Article
Chemistry, Multidisciplinary
Martin Dracinsky, Carina Santos Hurtado, Eric Masson, Jiri Kaleta
Summary: Solvent-free mechanochemical synthesis was used to prepare inclusion complexes with cucurbit[7]uril and four model guest molecules. Confirmation of successful formation of individual inclusions was independently confirmed by solid-state NMR techniques and differential scanning calorimetry. Mechanochemical synthesis is an alternative route towards new types of cucurbit[n]uril-guest inclusion complexes.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Organic
Xiaodong Zhang, Tao Sun, Xin-Long Ni
Summary: This study explores the host-guest interactions of cucurbit[8]uril with pi-conjugated bispyridinium guests in aqueous solution, resulting in a series of dynamic assemblies distinguishable by naked-eye observation and quantitative fluorescence emissions. The dissociation and control of host-stabilized charge-transfer interactions by N-substituted alkyl chains on cationic guests led to the discovery of new possible binding modes for the cucurbit[8]uril host.
ORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Organic
Khaleel Assaf
Summary: The supramolecular complexation of doxepin with cucurbit[7]uril was investigated in aqueous solution, and a host-guest complex was formed. The partial encapsulation of doxepin led to the development of a supramolecular assembly at low concentration.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2022)
Article
Chemistry, Organic
Tianci He, Xianchen Hu, Simin Liu
Summary: An iminium dication 1 was designed as an easily removable guest for CB[7], showing high affinity (K-a > 10(11) M-1) due to optimized ion-dipole interactions and packing coefficient. Under alkaline conditions, 1 in CB[7]center dot 1 is hydrolyzed into 2,6-adamantanedione and pyrrolidine, which can be fully removed by further extraction, enabling the recycling of CB[7] materials.
Article
Chemistry, Multidisciplinary
Miriam Colaco, Patricia Maximo, A. Jorge Parola, Nuno Basilio
Summary: The study focuses on the kinetics of a water-soluble host-guest system based on cucurbit[8]uril and two DTE photoswitches, demonstrating a method to control the binding kinetics in supramolecular systems using external stimuli. By modifying the structure of the DTE guest molecule, it is possible to significantly slow down the formation/dissociation rates of pseudorotaxane structures, leading to the emergence of a competitive metastable product with important impact on the overall binding kinetics. Additionally, the dissociation kinetics of the host-guest system can be controlled by approximately 100-fold by switching between closed and open DTE isomers.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Chemistry, Physical
Valya Nikolova, Anita Velinova, Stefan Dobrev, Nikoleta Kircheva, Silvia Angelova, Todor Dudev
Summary: The interactions between neutral/protonated mitoxantrone and cucurbit[n]uril (n = 7, 8) host systems were analyzed using density functional theory calculations. It was found that stable inclusion complexes can form between doubly and quadruply charged mitoxantrone molecules and CB[7] or CB[8] in a water solvent. Both CB[7] and CB[8] show properties that are useful for drug delivery.
JOURNAL OF PHYSICAL CHEMISTRY A
(2021)
Article
Biochemical Research Methods
Valya Nikolova, Stefan Dobrev, Nikoleta Kircheva, Victoria Yordanova, Todor Dudev, Silvia Angelova
Summary: Cucurbiturils are beneficial excipients in eye drop formulations due to their ability to improve drug solubility, absorption, stability, and reduce irritation. Understanding the interactions between the host-guest molecules (CBs and antimuscarinic drugs) can enhance current treatments and develop new therapies for eye conditions. This study focuses on factors such as guest position, drug ionization, medium dielectric constant, and pore size, providing atomic-level insights into the recognition mechanism between CBs and the drugs.
JOURNAL OF MOLECULAR GRAPHICS & MODELLING
(2023)
Article
Chemistry, Medicinal
Zhaoxi Sun, Zhe Huai, Qiaole He, Zhirong Liu
Summary: Describing, understanding, and designing complex interaction networks within macromolecular systems remain challenging in modern chemical research. Host-guest systems, despite their relative simplicity in both the structural feature and interaction patterns, still pose problems in theoretical modeling. The barrel-shaped supramolecular container cucurbit[8]uril (CB8) shows promising functionalities in various areas.
JOURNAL OF CHEMICAL INFORMATION AND MODELING
(2021)
Article
Chemistry, Multidisciplinary
Sebastian Almendras, Ana Maria Zarate, Luis Dinamarca-Villarroel, Daniel Guerra, Denis Fuentealba, Jose M. Eltit, Margarita E. Aliaga, Angelica Fierro, Edwin G. Perez
Summary: This study investigated the supramolecular binding behavior of APP(+) and CB[7] in aqueous solution, as well as their cytotoxic effects on HEK293 cells. The results demonstrate that CB[7] can protect cells from the cytotoxicity of APP(+) by forming a complex that reduces the harmful impact of APP(+) on the cells.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Yang Luo, Wei Zhang, Xi Nan Yang, Mao Xia Yang, Wen Min, Zhu Tao, Xin Xiao
Summary: In this study, a novel orthogonal supramolecular polymer was successfully constructed with excellent fluorescence properties, demonstrating good recognition and classification abilities towards various acidic compounds and iodide ions.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Suresh Moorthy, Alvaro Castillo Bonillo, Hugues Lambert, Elina Kalenius, Tung-Chun Lee
Summary: A new supramolecular approach has been reported to selectively deactivate the electrophilic alpha-carbon of phenyl diazonium ion through host-guest complexation, thus avoiding undesirable side reactions. This method holds great potential for the reactive chemistry of organic molecules in aqueous media.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Jackson J. Alcazar, Niklas Geue, Veronica Valladares, Alvaro Canete, Edwin G. Perez, Luis Garcia-Rio, Jose G. Santos, Margarita E. Aliaga
Summary: In this study, a series of aromatic Schiff bases containing 7-diethylamino-coumarin with different substituents on an adjacent phenyl ring were synthesized and characterized. The stability of these dyes in acidic medium was assessed by studying their hydrolysis reactions both in the absence and presence of the macrocycle CB[7]. The results revealed supramolecular control of CB[7] on the reactivity and stability of 7-diethylaminocoumarin Schiff bases, with CB[7] exhibiting both catalytic and inhibitory effects on the hydrolysis reactions.
Article
Chemistry, Multidisciplinary
Xin Huang, Hang Zhou, Rong Jiao, Hanrui Liu, Changfu Qin, Lixin Xu, Yueyue Chen
Summary: Supramolecular chemotherapy is an effective strategy to improve the therapeutic efficacy of traditional chemotherapy. The study showed that a supramolecular platform based on cucurbit[7]uril and heptaplatin had higher antitumor activity against colorectal tumors with lower cytotoxicity to normal cells. These findings are expected to advance supramolecular chemotherapy in clinical development.
Article
Chemistry, Physical
Hugues Lambert, Alvaro Castillo Bonillo, Qiang Zhu, Yong-Wei Zhang, Tung-Chun Lee
Summary: This study computationally explores the modulation of the release kinetics of a guest molecule from the CB7 cavity by ligands binding to the host portal. A correlation between ligand-binding affinity with CB7 and guest residence time is uncovered, allowing for rapid prediction of release kinetics. The study also designs cap-shaped ligand molecules with large binding affinities to significantly boost guest residence times. Notably, halogenated aromatic compounds emerge as top-ranking ligands, and their binding to CB7 is supported by experimental evidence.
NPJ COMPUTATIONAL MATERIALS
(2022)
Article
Biochemical Research Methods
Carlos Redondo-Gomez, Soraya Padilla-Lopategui, Alvaro Mata, Helena S. Azevedo
Summary: The host-guest-mediated PA hydrogelation method relies on the formation of a host-guest homoternary complex with CB[8] and aromatic amino-acid-bearing PA nanofibers, resulting in hierarchical morphologies and increased stiffness compared to ion-based equivalents. This alternative cross-linking method can upgrade the design of PA materials and extend their biomedical applications, while maintaining similar biocompatibilities between the new and conventional hydrogels.
BIOCONJUGATE CHEMISTRY
(2022)
Article
Chemistry, Applied
Tugce Gunay Semerci, Arianna Melillo, Yasemin Cimen Mutlu, Hermenegildo Garcia
Summary: Simulated sunlight driven overall water splitting was achieved using porphyrin-based PCN-222 metalorganic frameworks with various transition metals. PCN-222(Zn) exhibited the highest H2 evolution reaction (HER) efficiency, surpassing porphyrinic MOFs with Pt. In addition, oxygen evolution was detected in a quasi stoichiometric ratio to H2. Transient absorption spectroscopy measurements provided evidence for charge separation and oxidation of H2O by positive holes. This study offers insights for the development of noble metal-free photocatalysts for water splitting and future experiments for uphill reactions.
Review
Chemistry, Multidisciplinary
Yong Peng, Soheila Sanati, Ali Morsali, Hermenegildo Garcia
Summary: Transition metal complexes are well-known as homogeneous electrocatalysts, and metal-organic frameworks (MOFs) can be considered as ordered ensembles of these complexes. MOFs have additional positive features for electrocatalysis, such as large surface area, high porosity, and high content of accessible transition metal with exchangeable coordination positions. This review focuses on the use of MOFs as electrocatalysts, both as hosts for electroactive guests and for their direct electrocatalytic activity, with a special emphasis on bimetallic MOFs. Strategies to overcome their poor electrical conductivity and limited stability are also discussed.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Alberto Garcia-Baldovi, Raquel Del Angel, Georges Mouchaham, Shanping Liu, Dong Fan, Guillaume Maurin, Sergio Navalon, Christian Serre, Hermenegildo Garcia
Summary: This study reports a new paradigm in MOF photocatalysis using a microporous titanium oxocluster based metal-organic framework (Ti-MOF) with formate-imprinted active sites, MIP-177-LT, as a highly efficient photocatalyst for H-2 release from formic acid without the need for neutralization of acidity or the use of sacrificial agents or noble metals. Notably, a quantum efficiency of 22% has been determined for the photocatalytic H-2 release, which is highly remarkable for a non-toxic noble metal-free photocatalyst.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Physical
Soheila Sanati, Ali Morsali, Hermenegildo Garcia
Summary: This study introduces a new core-shell-structured bifunctional electrocatalyst, NU-1000/CuCo2S4, for oxygen evolution reaction (OER), hydrogen evolution reaction (HER), and overall water splitting. The nanocomposite exhibits rich porosity, high electrical conductivity, high stability, and a higher density of active sites. It achieves water electrolysis in a 1 M KOH solution with overpotentials of 335 mV for OER and 93 mV for HER at a current density of 10 mAcm-2. The long-term stability test shows significant stability in a 72 h run. Additionally, it requires 1.55 V to deliver 10 mA cm-2 current density in overall water splitting. Consequently, this electrocatalyst holds potential for producing oxygen and hydrogen from water.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Review
Chemistry, Applied
Kayhaneh Berijani, Ali Morsali, Hermenegildo Garcia
Summary: Metal-organic frameworks (MOFs) are a type of porous materials with diverse applications. Recently, there has been increasing interest in synthesizing MOFs with multimodal pores, which can enhance the performance of MOFs in different applications.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Sara Oudi, Ali Reza Oveisi, Saba Daliran, Mostafa Khajeh, Amarajothi Dhakshinamoorthy, Hermenegildo Garcia
Summary: Researchers designed and synthesized a porphyrin-based covalent organic framework (COF) called Porph-UOZ-COF. The COF exhibited outstanding catalytic performance under visible-light, without the need for additives or metals, and could be reused. This study demonstrates the potential of COFs as metal-free catalysts for tandem reactions.
Article
Chemistry, Physical
Pablo Salcedo-Abraira, Ruben Serrano-Nieto, Catalina Biglione, Maria Cabrero-Antonino, Sergio M. F. Vilela, Artem A. Babaryk, David Tilve-Martinez, Antonio Rodriguez-Dieguez, Sergio Navalon, Hermenegildo Garcia, Patricia Horcajada
Summary: Two three-dimensional metal-organic frameworks (MOFs) called IEF-8 and IEF-9, based on the pyrene tetraphosphonate ligand and copper, have been successfully synthesized and characterized. These MOFs exhibit good thermal and chemical stability, as well as photoresponse suitable for photocatalysis. Specifically, IEF-8 showed higher catalytic efficiency than the benchmarked Ti carboxylate photocatalyst MIL-125-(Ti)-NH2, producing 1800 mu mol center dot g(-1) of hydrogen after 22 hours of UV-vis irradiation without any co-catalyst.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Ruben Ramirez, Arianna Melillo, Silvio Osella, Abdullah M. Asiri, Hermenegildo Garcia, Ana Primo
Summary: A general method is reported to prepare MXene quantum dots (MxQDs) with yields over 20% by liquid-phase laser ablation of the MAX phase. Mechanical and thermal shock by 532 nm laser pulses produces MAX etching and exfoliation to form MXene QDs, avoiding the use of HF. The method is applied to various MAX phases and the MXene size reduction to the nanometric scale allows for control of the band gap. The MXene QDs show high photocatalytic activity for hydrogen evolution.
Review
Chemistry, Multidisciplinary
Amarajothi Dhakshinamoorthy, Sergio Navalon, Ana Primo, Hermenegildo Garcia
Summary: This article provides a brief summary of the advantages of metal-organic frameworks (MOFs) as catalysts in liquid-phase and gas-phase reactions, particularly in the selective CO2 hydrogenation to CH3OH. It highlights the temperature compatibility window for MOFs in the CO2 hydrogenation process and organizes the existing literature based on the role of MOFs as active sites or support for metal nanoparticles. The flexibility in design and synthesis of MOFs to enhance catalytic activity, as well as the influence of structural defects and material crystallinity, are emphasized.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Chemistry, Inorganic & Nuclear
Kuan-Guan Liu, Fahime Bigdeli, Akram Panjehpour, Afsanehsadat Larimi, Ali Morsali, Amarajothi Dhakshinamoorthy, Hermenegildo Garcia
Summary: Global warming is a major environmental threat caused by greenhouse gases, and technologies that convert CO2 into valuable and environmentally friendly fuels and chemicals are highly important. Metal organic frameworks (MOFs) with embedded functional sites or guests have shown excellent potential for such conversion, especially in MOF composites. This review discusses the use of MOF composites as catalysts for CO2 reduction, converting it into various value-added and environmentally friendly chemicals. Four major approaches for CO2 reduction are covered, along with the design and development of appropriate MOF composites. The future outlook on the use of MOF composites in CO2 reduction is also provided.
COORDINATION CHEMISTRY REVIEWS
(2023)
Article
Chemistry, Physical
Jokotadeola A. Odutola, Horatiu Szalad, Josep Albero, Hermenegildo Garcia, Nikolai V. Tkachenko
Summary: New insights into the improved photo(electro)catalytic activity of graphene by heteroatom doping were explored. N-doped graphene exhibited stronger absorption signals, longer response lifetime, and different dielectric function spectra compared to undoped graphene, which was attributed to electron trapping at doping centers.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Shan Dai, Eva Montero-Lanzuela, Antoine Tissot, Herme G. G. Baldovi, Hermenegildo Garcia, Sergio Navalon, Christian Serre
Summary: In this study, the researchers reported for the first time the efficient synthesis of highly redox active Ce(iv)-MOFs through room temperature synthesis. These Ce(iv)-MOFs showed excellent photocatalytic activities in hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), and Ce-UiO-66-NH2 combined with supported Pt NPs exhibited the highest activity in overall water splitting under simulated sunlight irradiation due to efficient photoinduced charge separation.
Article
Materials Science, Multidisciplinary
Marco Serra, Nikolas Antonatos, Jan Luxa, Luc Lajaunie, Josep Albero, Agata Sabik, Wojciech M. Linhart, Hermenegildo Garcia, Robert Kudrawiec, David Sedmidubsky, Zdenek Sofer
Summary: A NiGa2S4 photodetector was prepared and its photoresponse behavior in different electrolyte solutions was investigated. The results showed that ethanol, as an electron donor, significantly improved the performance of the photodetector and expanded its spectral response range. The dynamics of photogenerated electrons and holes were studied, and the stability of the fueled PEC photodetector was evaluated through long-term tests. This work provides fundamental insight into PEC semiconductor-based photodetectors and offers an extendable strategy for engineering high-performance PEC devices.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Physical
Parisa Alamdari, Farhad Sharif, Saeedeh Mazinani, German Sastre, Hermenegildo Garcia
Summary: Graphene research focuses on altering the structure to improve performance and induce new properties. This study specifically investigates the conversion between hexagon and non-hexagon rings as a tool to control the electronic structure of graphene. The study also explores the possibility of converting pentagon-octagon-pentagon rings to pentagon-heptagon pair rings and examines the influence of heteroatom doping on these transformations.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Christian Mark Pelicano, Jiaxin Li, Maria Cabrero-Antonino, Ingrid F. Silva, Lu Peng, Nadezda V. Tarakina, Sergio Navalon, Hermenegildo Garcia, Markus Antonietti
Summary: We have successfully designed carbon/potassium poly(heptazine imide) heterostructures via a one-step salt-melt assisted condensation method for efficient photocatalysis. By hybridizing adenine-derived carbonaceous material (Ad-carbon) with KPHI, the photocatalytic activity for H-2 evolution and H2O2 production significantly improved. We found that Ad-carbon acts as both an electron acceptor and a photosensitizer, and the intimate heterojunction between Ad-carbon and KPHI promotes charge separation and extends carrier lifetime. Electrocatalysis experiments confirmed that coupling Ad-carbon with KPHI enhances surface reaction kinetics for H-2 evolution and O-2 reduction reactions. The visual evidence of superior charge transport in the hybrid photocatalyst is demonstrated by the uniform distribution of smaller Pt nanoparticles on the carbon regions, which contributes to the increased catalytic activity.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Wiem Bouali, Muejgan Yaman, Nurgul Seferogu, Zeynel Seferogu
Summary: Novel chemosensors, including coumarin hydrazide, were synthesized and demonstrated the ability to detect cyanide ions through absorption and fluorescence turn-off response. The reaction mechanism between the sensors and the ions was determined through experimental and theoretical studies. The sensors exhibited high detection ability and effectiveness.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
Parinaz Abdollahian, Hassan Heidari, Soheila Hassanzadeh, Mohammad Hasanzadeh
Summary: This study successfully synthesized various types of thiolated-graphene quantum dots (GQDs) and utilized them in a one-droplet microfluidic paper-based analytical device for the simultaneous multi-sensing of heavy metal ions. The GQDs were functionalized and stabilized on the surface of hydrophobic fiber-glass, enabling colorimetric chemosensing of ions including iron, copper, cobalt, mercury, chrome, manganese, and nickel. The results were confirmed using fluorescence spectrometry, and the platform showed potential for facile metal ion detection in human urine models and environmental fluids.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
S. L. Barrett, C. Meyer, E. Cwiklik, V Fieglein, M. Burns, J. Guerrero, W. J. Brittain
Summary: Laboratory illumination is strong enough to create a photostationary state (PSS) of amphiphilic azo-benzene compounds in water. The [cis]PSS/[trans]PSS ratios were observed to be 0.33-1.2 in D2O and 0.37-3.8 in dimethyl sulfoxide-d6. ortho-Fluoroazobenzene amphiphiles show higher cis-isomer concentration at equilibrium compared to non-fluorinated compounds due to differences in optical absorption profiles. The kinetics of isomerization were measured using UV-Vis spectroscopy and the ratio of trans-to-cis rates does not directly correlate with the observed PSS. The half-life for PSS formation is 40 minutes for fluorinated compounds and 80 minutes for non-fluorinated compounds.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
Jalil Khodayari, Karim Zare, Omid Moradi, Mohammadreza Kalaee, Niyaz Mohammad Mahmoodi
Summary: In this study, an eco-friendly biocomposite (CMC/MIL/CuO) was synthesized and characterized, and its ability to decolorize Acid Blue 92 dye was investigated. The results showed that CMC/MIL/CuO can be used as a suitable photocatalyst for dye decolorization.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
Bo Ma, Qian Xu, Huajun Yao, Yalin Chen, Yiyang Wang, Yunfei Yang, Hongfang Shen, Youjun Lu
Summary: This study designed an integrated structure of Cu2O@Au/Cu2O heterostructure particles, which achieved significantly enhanced photocatalytic performance by simultaneously considering the integrated structural characteristics and localized surface plasmon resonance (LSPR) effect. Experimental characterization and theoretical simulation confirmed the three-in-one synergy of the integrated heterostructure, including the LSPR effect of Au nanoparticles, the light scattering based on core-shell heterostructure, and the effective charge separation based on inter-embedded heterostructure. The concept of integrated heterostructure cooperated with LSPR effect provides a new strategy for designing future catalysts.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
Robert G. H. Marks, Sarah P. Rockel, Klaus Kerpen, Holger Somnitz, Philipp R. Martin, Maik A. Jochmann, Torsten C. Schmidt
Summary: This study investigated the pH-dependent photolysis of phosphonates in aqueous solutions and analyzed the transformation products. The results showed that the photolysis rate of phosphonates was influenced by pH and light conditions. Furthermore, the carbon kinetic isotope effects varied for different types of phosphonates.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
T. M. Naren Vidaarth, S. Surendhiran, K. S. G. Jagan, S. Savitha, K. S. Balu, A. Karthik, B. Kalpana
Summary: In this study, magnesium oxide nanoparticles were synthesized using plant seed extracts, which exhibited excellent performance in removing dyes from textile water bodies. These nanoparticles also showed strong antibacterial and antioxidant properties.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
Mikhail Yu. Ovchinnikov, Vyacheslav A. Antipin, Sergey L. Khursan
Summary: In this study, the recombination of separated ion-radical states (SIRS) in PAPh films was analyzed, and it was found that the contribution of X-SIRS recombination to total luminescence varies with different environments. It was also shown that the recombination of labile SIRS is independent of the nature of the atmosphere. The study theoretically substantiated that SIRS recombination can occur via the transfer of both positive and negative charges, and the efficiency of thermal activation of recombination processes depends on the ratio of radiant and conductive channels of energy transfer.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
Sumaira Naeem, Tayyaba Mubashir, Mudassir Hussain Tahir, Jawayria Najeeb, Ahmed Z. Dewidar, Hosam O. El-ansary, Silas Lagat, Anthony Pembere
Summary: This study presents an alternative methodology using machine learning for the selection of novel organic molecules to develop high-performance organic solar cell devices.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
D. Thirumoolan, S. Ragupathy, S. Renukadevi, P. Rajkumar, Rajakumar S. Rai, R. M. Saravana Kumar, Imran Hasan, Mani Durai, Young-Ho Ahn
Summary: In this study, the photodegradation of brilliant green dye was studied in relation to the comparative photocatalytic activity of pure ZnO and Ni-doped ZnO/CSAC. The Ni-doped ZnO/CSAC showed a higher photocatalytic degradation rate under visible light irradiation, suggesting its potential as an effective wastewater treatment material.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
Ajmal Khan, Zhidong Chang, Wenjun Li, Xiaohui Ma, Mei Dong, Liang Geng, Ghulam Yasin, Shuaib Khan, Hira Anwar
Summary: Due to its functional structure and tunable shape, 2D zeolitic imidazole framework (ZIFs) have gained significant interest in various fields. In this study, thin ZIF-8 sheets were prepared using a mixed solvent and then delaminated into single layers through physical sonication. These hexagonal sheets exhibited high stability and controlled morphology, and showed excellent performance in dye degradation compared to 3D ZIF-8 crystals.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
Vitaly A. Podshibyakin, Evgenii N. Shepelenko, Leonid D. Popov, Tatyana M. Valova, Anton O. Ayt, Lyudmila G. Kuzmina, Anton V. Lisovin, Oleg N. Burov, Mikhail E. Kletskii, Alexander D. Dubonosov, Vladimir A. Bren
Summary: Bifunctional hybrids containing photochromic indolyl(thienyl) diarylethenes and an ionochromic rhodamine moiety connected by a dimethylene spacer were synthesized. These hybrids exhibit absorption at 450-455 nm and fluorescence at 560 nm in toluene. UV light triggers ring-closed non-fluorescent diarylethene formation, which can be reversed under visible light or in the dark. In the presence of H+ cation, a naked eye effect is observed with the opening of the rhodamine-spirolactam ring and a pink-crimson coloration at 561 nm accompanied by intense long-wavelength emission at 586 nm. This process is reversible by exposure to triethylamine, as confirmed by NMR experiments. The light-induced isomerizations and proton-induced transformations were explained using computational methods. Reversible switching of fluorescent properties can be achieved by light irradiation and proton.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
Majid Sharifi-Rad, Hazem S. Elshafie, Pawel Pohl
Summary: The study investigated the synthesis of silver nanoparticles using Lallemantia royleana leaf extract, characterized their physico-chemical properties, and evaluated their biopharmaceutical and catalytic applications. The synthesized nanoparticles showed good stability and exhibited higher antioxidant, antimicrobial, anti-inflammatory, anti-arthritic, and cytotoxic activities compared to the leaf extract. These results provide a promising green synthesis route for silver nanoparticles with potential biomedical and catalytic applications.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
Meera Moydeen Abdul Hameed, Badr M. Thamer
Summary: Security encoding using photochromism is an effective method for creating authentication substrates. A unique photochromic ink has been developed that emits light continuously under UV rays and darkness. The ink is produced by dispersing lanthanidedoped aluminate nanoparticles in a polymer binder. The resulting composite ink can be used to create transparent films on paper, and the stamped patterns become visible under UV rays, changing from colorless to green.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)
Article
Chemistry, Physical
Monika Lamoria, Rita Kakkar, Marilyn Daisy Milton
Summary: Four novel water-soluble benzimidazolium and bis-benzimidazolium salts with a fluorophore-spacer-receptor design were synthesized and demonstrated to selectively detect Fe3+ ions with large Stokes shifts. The binding mechanism and detection performance were investigated through theoretical and experimental studies.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2024)