Article
Polymer Science
Marina Matsuda, Mineto Uchiyama, Yuki Itabashi, Kei Ohkubo, Masami Kamigaito
Summary: Acridinium salts with high excited-state oxidative power, in combination with thioesters, enable controlled cationic polymerization of alkyl vinyl ethers under visible light. The photoexcited acridinium salts generate cationic species from sulfur compounds, accelerating the polymerization. Temporal control of polymerization can be achieved by light switching, facilitating the synthesis of block copolymers of alkyl vinyl ethers.
Article
Chemistry, Physical
Giuseppe Trusiano, Alessandra Vitale, Jason Pulfer, Josiah Newton, Christine Joly-Duhamel, Chadron M. Friesen, Roberta Bongiovanni
Summary: Several difunctional oligomers were synthesized by functionalizing perfluoropolyalkylether (PFPAE) chains with different vinyl ethers and epoxides end-groups. Despite low yield and average functionality, the functionalized PFPAE oligomers showed success in photo-induced cationic polymerization processes, producing transparent and soft films. The influences of fluorinated chains, various end-groups on photopolymerization process, as well as their chemical stability, thermal degradation, and surface properties were investigated.
COLLOID AND POLYMER SCIENCE
(2021)
Article
Polymer Science
Filip Petko, Andrzej Swiezy, Magdalena Jankowska, Pawel Stalmach, Joanna Ortyl
Summary: In this article, a new group of cationic photoinitiators is introduced and their photophysical properties and photoinitiating activity are analyzed with respect to the arrangement of electron-donating substituents in the coumarin chromophore. The authors observed two patterns of D-pi-A structure in the five new coumarin-based iodonium salts, which differ in the strength of the push-pull effect that determines their properties. These photoinitiators show excellent activity at 365 nm, 405 nm, and 415 nm and exhibit increased activity at elevated temperatures due to thermal reactions with monomers. This photo-thermal initiating activity makes them excellent photoinitiators for nanocomposite DLP 3D-VAT printing, overcoming scattering and shadowing problems.
Article
Chemistry, Multidisciplinary
Ceren Kutahya, Yingxiang Zhai, Shujun Li, Shouxin Liu, Jian Li, Veronika Strehmel, Zhijun Chen, Bernd Strehmel
Summary: Carbon nanodots (CDs) from different biomass show varying activities in sensitizing photo-induced reactions, and also demonstrate efficiency in free radical polymerization processes. The time-resolved fluorescence measurements revealed the presence of multiple emitting species contributing to the reactivity of excited states.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Polymer Science
Lorand Bonda, Daniel J. J. Valles, Tillmann L. L. Wigger, Jan Meisner, Adam B. B. Braunschweig, Laura Hartmann
Summary: Controlled radical polymerizations (CRPs) are an important method for obtaining uniform and defined molecular weight polymers with complex composition and architecture. A new controlled and light-initiated radical polymerization using thiol initiators and an Ir-photocatalyst is introduced. Different reaction parameters are studied for their importance in achieving controlled characteristics of polymerization, such as low dispersity and control of molecular weights, and the ability to access block copolymers easily. The proposed mechanism for thiol-induced, light-activated, controlled radical polymerization (TIRP) involves the formation of dormant species and their equilibrium with the active polymer chain end, which is dependent on light and catalyst. TIRP expands the range of controlled and light-initiated polymerization methods by its mild conditions and the ability to grow polymers from a variety of readily available thiols.
Article
Chemistry, Multidisciplinary
Junjun Wang, Yize Zhang, Zhi-Peng Yu, Houshi Huang, Lei Chen, Xiaojiao Zhu, Jie Zhang, Lianke Wang, Jianhua Yu, Hongping Zhou
Summary: A theranostic nanoagent based on single-molecule FRET was designed for efficient cancer treatment and imaging, converting harvested photo-energy into multiple forms and demonstrating superior tumor targeting ability and synergistic therapeutic effects.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Applied
Francesco Ruighi, Eduardo Fabiano, Lorenzo Franco, Alessandro Agostini, Samuel Zatta, Giuseppina Anna Corrente, Amerigo Beneduci, Antonio Cardone, Gianluca Accorsi, Agostina Lina Capodilupo
Summary: Three arylamino-dibenzothiophene derivatives (Ary2-DBT, Ary2-DBTSO and Ary2-DBTSO2) based on a D-π-D molecular architecture were synthesized and studied. The effects of neutral and radical species on the photophysical properties were investigated through various techniques including cyclic voltammetry, UV/Vis-NIR and fluorescence spectroscopy, TDDFT calculation, and EPR spectroscopy measurements. Spectroelectrochemical measurements showed the ability of these molecular systems to change their color output by adjusting the applied voltage. Electrochromic devices were fabricated to demonstrate the functionality of these dyes as anodic components.
Article
Chemistry, Multidisciplinary
Zilong Wu, Wenbo Fang, Chenyu Wu, Nathaniel Corrigan, Tong Zhang, Sihao Xu, Cyrille Boyer
Summary: In this study, we report an aqueous and near-infrared light mediated photoinduced reversible addition-fragmentation chain transfer polymerization system. With the high catalytic efficiency and excellent oxygen tolerance, this system allows fast synthesis of well-controlled polymers, even in the presence of non-transparent barriers. We further demonstrate the synthesis of polymeric nanoparticles with consistent morphologies through thick barriers, utilizing the advantages of NIR wavelengths.
Article
Chemistry, Applied
Tanlong Xue, Liqun Tang, Ruifen Tang, Yang Li, Jun Nie, Xiaoqun Zhu
Summary: A new pyrrole-based ketone derivative (C3PY) was synthesized and characterized for its color evolution in photopolymerization. It was found that C3PY could initiate acrylate polymerization as a photoinitiator, with enhanced monomer conversion when triethanolamine was added, while combination with iodonium salt resulted in colored polymer formation. Various experiments and calculations were conducted to study the chromatic mechanism of C3PY in different formulations, revealing potential compounds responsible for the deep color in acrylate polymer. Overall, this work sheds light on the color change of pyrrole-based ketone dye in radical photopolymerization and its implications for understanding the chromatic behaviors of other dyes in such processes.
Article
Polymer Science
Christine Elian, Vlasta Brezova, Pauline Sautrot-Ba, Martin Breza, Davy-Louis Versace
Summary: Two new photopolymerizable vinyl (HNQA) and epoxy (HNQE) photoinitiators derived from lawsone were designed in this study. These photoinitiators can be used as one-component systems for free-radical polymerization without the addition of any co-initiators, and the introduction of iodonium salt as a co-initiator has shown enhanced polymerization rates. Additionally, thiol-ene reaction and cationic photopolymerizations can be concomitantly achieved with the HNQA/Iod photoinitiating system.
Article
Polymer Science
Wiktoria Tomal, Tomasz Swiergosz, Maciej Pilch, Wiktor Kasprzyk, Joanna Ortyl
Summary: This study investigates the application of citric acid-based carbon dots as efficient photosensitizers for initiating light-induced cationic polymerization, showing their potential in various polymerization reactions, including 3D printing. Carbon dots are found to be intriguing nano-photoinitiating catalysts with extraordinary properties under visible light.
Article
Polymer Science
Xiaoguang Qiao, Liang Qiao, Mengjie Zhou, Xi Zhang, Ge Shi, Yanjie He, Elodie Bourgeat-Lami, Xinchang Pang
Summary: This study demonstrates the efficient utilization of carbon quantum dots as a green photocatalyst in miniemulsion atom transfer radical polymerization. The heterogeneous photocatalytic system shows high reaction rates and excellent temporal control, and can be extended to other aqueous dispersion RDRP systems.
Article
Polymer Science
Paulina Bednarczyk, Izabela Irska, Konrad Gziut, Paula Ossowicz-Rupniewska
Summary: A series of novel multifunctional epoxy (meth)acrylate resins have been synthesized in this work, which have both epoxides and carbon-carbon double bonds and can be crosslinked through different mechanisms. The structure and properties of the synthesized resins were studied to formulate photocurable coating compositions.
Article
Chemistry, Multidisciplinary
Xiaxin Gao, Jin Li, Tiantian Li, Zhilong Su, Xiaodong Ma, Jie Yin, Xuesong Jiang
Summary: Hierarchical patterns on surfaces can be created using a strategy involving a fluorinated copolymer, UV irradiation, and control over monomer proportions, fluorinated copolymer content, and film thickness. This method offers a rapid and universal way to fabricate such patterns, with potential applications in LED chip encapsulation and anti-counterfeiting measures.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Yasuhiro Hashimoto, Genki Horiguchi, Hidehiro Kamiya, Yohei Okada
Summary: The design of photocatalytic processes, especially the electron transfer-based [2+2] cycloaddition reaction, plays a crucial role in organic synthesis. Electron transfer is essential for reaction design and occurs not only between the substrate and the photocatalyst but also within and between molecules. The photocatalyst generates radical cations that are trapped by alkenes, leading to the formation of cyclobutyl radical cations. These radical cations are then reduced by aryl rings via intramolecular electron transfer, resulting in the formation of cyclobutane rings. The outcome of the reaction is influenced by the substitution of the aryl ring and the linker connecting the aryl ring to the enol ether. Carefully designed substrates exhibit high efficacy in photocatalytic cycloaddition.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Applied
Radoslaw Podsiadly, Aleksandra Grzelakowska, Julia Modrzejewska, Przemyslaw Siarkiewicz, Daniel Slowinski, Marcin Szala, Malgorzata Swierczynska
Article
Biochemistry & Molecular Biology
Gang Cheng, Jing Pan, Radoslaw Podsiadly, Jacek Zielonka, Alexander M. Garces, Luiz Gabriel Dias Duarte Machado, Brian Bennett, Donna McAllister, Michael B. Dwinell, Ming You, Balaraman Kalyanaraman
FREE RADICAL BIOLOGY AND MEDICINE
(2020)
Review
Chemistry, Multidisciplinary
Adam Sikora, Jacek Zielonka, Karolina Debowska, Radoslaw Michalski, Renata Smulik-Izydorczyk, Jakub Pieta, Radoslaw Podsiadly, Angelika Artelska, Karolina Pierzchala, Balaraman Kalyanaraman
FRONTIERS IN CHEMISTRY
(2020)
Article
Chemistry, Applied
Marcin Szala, Aleksandra Grzelakowska, Julia Modrzejewska, Przemyslaw Siarkiewicz, Daniel Slowinski, Malgorzata Swierczynska, Jacek Zielonka, Radoslaw Podsiadly
Article
Chemistry, Applied
Malgorzata Swierczynska, Daniel Slowinski, Aleksandra Grzelakowska, Marcin Szala, Jaroslaw Romanski, Karolina Pierzchala, Przemyslaw Siarkiewicz, Radoslaw Michalski, Radoslaw Podsiadly
Summary: A new selective probe containing the thiomorpholine unit was synthesized for the fluorescence-based detection of hypochlorous acid. The probe can effectively detect HOCl generated by myeloperoxidase and may lead to the development of novel fluorescent and luminogenic probes for HOCl imaging.
Article
Chemistry, Applied
Przemyslaw Siarkiewicz, Radoslaw Michalski, Adam Sikora, Renata Smulik-Izydorczyk, Marcin Szala, Aleksandra Grzelakowska, Julia Modrzejewska, Asha Bailey, Jacek E. Nycz, Balaraman Kalyanaraman, Jan Grzegorz Malecki, Jacek Zielonka, Radoslaw Podsiadly
Summary: Recent research focuses on the development of redox probes for in vivo applications, particularly near-infrared fluorescent sensors and tricyanofuran-based fluorophores. The tricyanofuran-based boronate probe forms an adduct with glutathione, decreasing its reactivity towards oxidants, while a modified probe derived from 1-naphthalene boronic acid reacts similarly with peroxynitrite but is not influenced by glutathione, making it suitable for real-time monitoring of peroxynitrite formation.
Article
Biochemistry & Molecular Biology
Aleksandra Grzelakowska, Monika Zielonka, Karolina Debowska, Julia Modrzejewska, Marcin Szala, Adam Sikora, Jacek Zielonka, Radoslaw Podsiadly
Summary: A new naphthalene-based boronate probe, NAB-BE, was developed for detecting inflammatory oxidants, with the ability to be used in both fluorimetry and two-photon fluorescence microscopy. The probe was able to detect both NAB-OH and NAB-NO2 products in cell extracts, providing a comprehensive characterization of oxidants in biological systems.
FREE RADICAL BIOLOGY AND MEDICINE
(2021)
Article
Chemistry, Applied
Daniel Slowinski, Malgorzata Swierczynska, Aleksandra Grzelakowska, Marcin Szala, Jolanta Kolinska, Jaroslaw Romanski, Radoslaw Podsiadly
Summary: This study presents a simple fluorescence and colorimetry dual-mode assay based on hymecromone and naphthoquinone for selective detection of hydrogen sulfide. The probes showed submicromolar detection limits of 130 nM and 150 nM in buffer, demonstrating their efficacy as quantitative detection tools for H2S.
Article
Biochemistry & Molecular Biology
Aleksandra Grzelakowska, Julia Modrzejewska, Jolanta Kolinska, Marcin Szala, Monika Zielonka, Karolina Debowska, Malgorzata Zaklos-Szyda, Adam Sikora, Jacek Zielonka, Radoslaw Podsiadly
Summary: A new water-soluble and cationic boronate probe (CI-Bz-BA) based on a coumarin-imidazolium scaffold for the fluorescent detection of ONOO- in cells was developed. The probe reacts stoichiometrically with ONOO- to form major phenolic product CI-OH and minor nitrated product CI-Bz-NO2, which were not formed by other oxidants tested. Detection of endogenously produced ONOO- was demonstrated using the probe in RAW 264.7 cells through fluorescence measurements and liquid chromatography/mass spectrometry analyses.
FREE RADICAL BIOLOGY AND MEDICINE
(2022)
Article
Biochemistry & Molecular Biology
Julia Modrzejewska, Marcin Szala, Aleksandra Grzelakowska, Malgorzata Zaklos-Szyda, Jacek Zielonka, Radoslaw Podsiadly
Summary: This study reports on the synthesis and characterization of a coumarin derivative containing an oxidant-sensitive boronate group as a fluorescent probe for the detection of peroxynitrite. The probe showed high stability and a fast response time, with the ability to detect peroxynitrite and hypochlorite in biological settings. HPLC-based identification of oxidant-specific products complements the fluorescence measurements for accurate detection of the oxidants.
Article
Multidisciplinary Sciences
Karolina Pierzchala, Marlena Pieta, Monika Rola, Malgorzata Swierczynska, Angelika Artelska, Karolina Debowska, Radoslaw Podsiadly, Jakub Pieta, Jacek Zielonka, Adam Sikora, Andrzej Marcinek, Radoslaw Michalski
Summary: MPO-derived oxidants, such as HOCl, play a role in tissue damage and the development of inflammatory diseases. This study compared three classes of fluorescent probes for monitoring myeloperoxidase-derived HOCl and found that all three classes of probes are suitable. However, probes based on the coumarin fluorophore were not reliable indicators. The reaction rate constants between HOCl and the probes were also determined.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Applied
Marcin Szala, Julia Modrzejewska, Aleksandra Grzelakowska, Jolanta Kolinska, Radoslaw Michalski, Angelika Artelska, Adam Sikora, Radoslaw Podsiadly
Summary: Multiple studies have shown that reactive oxygen and nitrogen species (RONS) play a role in tumor formation through redox signaling. This study reports the synthesis of new luciferin-based probes for the detection of nitroxyl. The probes showed reactivity and selectivity towards nitroxyl, and can be used for bioluminescence imaging in luciferase-transfected cells.
Article
Biochemistry & Molecular Biology
Daniel Swoboda, Jacek E. Nycz, Nataliya Karaush-Karmazin, Boris Minaev, Maria Ksiazek, Joachim Kusz, Radoslaw Podsiadly
Summary: Two unique structures were isolated from the phosphorylation reaction of 10H-phenothiazine. One of the products is the N-phosphorylation compound, while the other is an unstable product derived from the N-phosphorylation compound. The influence of phosphorus and sulfur atoms on the structural characteristics of phenothiazine derivatives was compared.
Article
Biochemistry & Molecular Biology
Daniel Slowinski, Malgorzata Swierczynska, Jaroslaw Romanski, Radoslaw Podsiadly
Summary: A new probe has been synthesized for the detection of hydrogen sulfide and related biothiols. The probe releases fluorescence under specific conditions and can differentiate different biothiols based on color and retention time.
Article
Spectroscopy
Malgorzata Swierczynska, Daniel Slowinski, Radoslaw Michalski, Jaroslaw Romanski, Radoslaw Podsiadly
Summary: A simple thiomorpholine-based fluorescent probe was designed and synthesized for detecting hypochlorous acid (HOCl). The probe effectively quenches the fluorescence of the fluorophore through photoinduced electron transfer (PET) effect. It has high sensitivity and selectivity, reliable performance at physiological pH, and rapid fluorescence response, making it suitable for detecting HOCl produced by myeloperoxidase. The probe shows promise as a screening tool for MPO inhibitors due to its high reaction rate constant with HOCl.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(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)
