Article
Engineering, Environmental
Chang Xu, Zehua Jin, Jun Yang, Fan Guo, Pan Wang, He Meng, Guirong Bao, Zhi Li, Chen Chen, Fenrong Liu, Ruisheng Hu
Summary: A series of LaFeO3/WO3 photocatalysts with different mass fractions were prepared by citric acid assisted hydrothermal method and analyzed for their structure, surface morphology, photometrics, and charge transfer. The establishment of a direct Z-scheme enhanced photocatalytic performance significantly, with the 15% LaFeO3/WO3 photocatalyst showing the best performance. The physically more feasible migration of photogenerated carriers was key to the excellent photocatalytic activity.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Long Cheng, Yang Zhang, Weikang Fan, Yuanhui Ji
Summary: This study synthesized a novel biochar/2Zn(3)In(2)S(6)/WO3 photocatalyst, which exhibited synergistic effects of adsorption and photocatalysis, leading to efficient degradation of pollutants in wastewater. The mechanism and pathways of adsorption and degradation were also investigated.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Chemical
Rui Ji, Jiadi Liu, Tingyu Zhang, Yang Peng, Youyong Li, Dongyun Chen, Qingfeng Xu, Jianmei Lu
Summary: A ternary nanoflower, In2S3@Au@P3HT, doped with gold nanoparticles and covered with a nanolayer P3HT, was prepared for efficient photocatalytic degradation of the organic pollutant phenol. The synergistic benefits of the gold nanoparticles and P3HT layer contribute to the high performance of the ternary Z-type heterojunction photocatalyst, showing rapid degradation of phenol in water remediation applications. This new strategy for preparing the highly-efficient photocatalyst provides potential for further environmental remediation solutions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Jiaxin Liu, Haiou Liang, Chunping Li, Jie Bai
Summary: This paper reports a Fe2O3/CN composite photocatalyst with a nanotubular morphology, where Fe2O3 is evenly distributed on the inner wall of CN. The catalyst exhibits Z-scheme heterojunctions, accelerating the migration of carriers between the two phases and significantly enhancing photocatalytic performance.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Chemistry, Multidisciplinary
J. C. Murillo-Sierra, A. Hernandez-Ramirez, D. A. Pino-Sandoval, E. Ruiz-Ruiz, A. Martinez-Hernandez
Summary: This study evaluated the application of the WO3/ZnS Z-scheme-heterojunction photocatalyst in the photocatalytic reduction of CO2. The quantity of WO3 was found to significantly affect the growth of ZnS crystallite size, conduction band potential modulation, and production of light hydrocarbons. The highest hydrocarbon production rate was achieved using a 5 wt% WO3 photocatalyst with respect to ZnS, with propane and propylene as the main products.
JOURNAL OF CO2 UTILIZATION
(2022)
Article
Chemistry, Physical
Kai Zhao, Yalan Feng, Zisheng Zhang, Hong Li, Xin Gao, Shuanglong Lin
Summary: Enhancing spatial charge separation is an efficient strategy for improving photocatalytic performance. In this study, a ternary GO/MoS2/Ag3PO4 Z-scheme heterostructure photocatalytic system was proposed to promote spatial charge separation at the surface and interface. The ternary photocatalyst exhibited enlarged surface area and improved N-2 photo-fixation efficiency under visible light irradiation, thanks to the decent properties of GO. The synergistic effect of electron transportation on GO and the efficient separation of electron-hole pairs on the heterojunction enabled the transportation and separation of photo-generated charges, leading to better harvest and utilization of light illumination.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Materials Science, Multidisciplinary
Weizhe Wang, Haowei Huang, Xi Ke, Xiao Liu, Shuhui Yang, Kunqiang Wang, Le Huang, Chen Tu, Zhaoqiang Zheng, Dongxiang Luo, Menglong Zhang
Summary: In this work, Z-scheme heterojunction photocatalysts composed of FAPbBr(3) nanocrystals and WO3 were prepared and showed excellent performance in the photocatalytic oxidation of benzyl alcohol to benzaldehyde or benzoic acid. Manipulation of the size of FAPbBr(3) nanocrystals altered the product selectivity.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
Qing Wang, Xuan-Xuan Cao, Tao Liu, Kang-Jie Wu, Juan Deng, Jing-Sheng Chen, Yue-Ji Cai, Meng-Qi Shen, Chao Yu, Wei-Kang Wang
Summary: The photocatalytic performance of WO3/MoS2 heterojunction composites prepared in a microfluidic system was studied, and characterized using XPS, M-S analysis and GC-MS. In the reduction of nitrobenzene, the photogenerated hole (h(+)) oxidation of formic acid provided the hydrogen source, and the deposited Pd nanoparticles enriched with photogenerated electrons improved the transfer hydrogenation efficiency. The microfluidic-prepared tandem photocatalyst provides meaningful guidance for the design and synthesis of heterojunction catalysts, promising for energy maximizing control systems.
Article
Chemistry, Physical
Amal Abd Elhakim, Maged El-Kemary, Mohamed M. Ibrahim, Ibrahim M. El-Mehasseb, Hamdy S. El-Sheshtawy
Summary: The research demonstrates the synergistic effect between adsorption and photocatalytic activity in heterocatalysis, improving the efficiency of removing organic and inorganic pollutants. The use of Ag NPs decorated WO3/GO composite enhances the catalytic and photocatalytic performance, especially in the removal of water pollutants under visible light irradiation.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Mope E. Malefane, Potlako J. Mafa, Muthumuni Managa, Thabo T. I. Nkambule, Alex T. Kuvarega
Summary: In the past seven years, dual Z-scheme hetero-junctions have emerged as favorable approaches for enhancing charge carrier separation through direct or indirect charge transfer. Understanding the dynamics of charge transfer is crucial for comprehending their photoactivity and stability, and a universal charge transfer-based classification of dual Z-schemes is proposed for different energy and pollution remediation strategies. Additionally, the existence of dual Z-schemes is confirmed using methods for determining charge transfer, and a new macroscopic N-scheme and triple Z-scheme heterostructures composed of four semiconductors are suggested for generating both oxidatively and reductively empowered systems, with potential applications in solar-driven chemical reactions.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Mope E. Malefane, Alex T. Kuvarega, Potlako J. Mafa, Muthumuni Managa, Thabo T. I. Nkambule
Summary: In the past seven years, dual Z-scheme hetero-junctions have emerged as favorable approaches for enhanced charge carrier separation. The understanding of charge transfer dynamics plays a major role in evaluating their photoactivity and stability. This article proposes a universal charge transfer-based classification for dual Z-schemes and outlines methods for determining the charge transfer as proof of their existence. Additionally, the article introduces new macroscopic N-scheme and triple Z-scheme systems that can be adopted for various applications.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Engineering, Chemical
Xueyan Zhang, Xinyue Wang, Jiaqi Meng, Yunqing Liu, Miao Ren, Yihang Guo, Yuxin Yang
Summary: Z-scheme g-C3N4/WO3 heterojunction photocatalysts with controlled morphology of WO3 are easily fabricated and applied in photocatalytic degradation of phenolic pollutants under simulated sunlight. The enhanced photocatalytic activity of g-C3N4/WO3 is attributed to the Z-scheme band alignment, impact of WO3 ratio and morphology, and intimate interfacial contact between WO3 and g-C3N4. Active species generated during the process can oxidize target pollutants to harmless inorganic compounds.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Physical
Wenjie Lu, Tong Qin, Bowei Wang, Jiayi Li, Hongqi Zhu, Guoyi Bai, Yang Li, Ligong Chen, Xilong Yan
Summary: According to reports, Z-scheme heterojunction can significantly improve the photocatalytic performance of semiconductor materials. In this study, a ternary photocatalyst (alpha-Fe2O3/g-C3N4/COF) with double Z-scheme heterojunctions was successfully designed and constructed. Characterization results showed that the material exhibited superior photoelectric properties and achieved excellent separation of photo-generated carriers. The proposed double Z-scheme heterojunction strategy provides a promising approach for constructing high-efficiency photocatalysts.
Article
Nanoscience & Nanotechnology
Biyun Lin, Zhihong Chen, Lingling Shui, Guofu Zhou, Xin Wang
Summary: A novel 2D/2D BiOBr/UMOFNs Z-scheme photocatalyst was successfully synthesized, showing high photocatalytic degradation efficiency and stability. Reactive OH and O-2(-) were found to play a major role in phenol degradation based on trapping experiment and electron paramagnetic resonance results. The excellent photocatalytic activity can be attributed to the efficient separation of photogenerated electron-hole pairs.
Article
Engineering, Environmental
Javier Fragoso, Davide Barreca, Lorenzo Bigiani, Alberto Gasparotto, Cinzia Sada, Oleg I. Lebedev, Evgeny Modin, Ivana Pavlovic, Luis Sanchez, Chiara Maccato
Summary: This study presents the use of heterostructures based on beta-Fe2O3 for De-NOx photocatalysis, fabricated by chemical vapor deposition of Fe2O3 and functionalized with CuO or WO3. The modulation of material performance by forming heterostructures enables efficient removal of nitrogen oxides. The improved photoactivity is attributed to matched band edges and increased oxygen defectivity in the target heterostructures.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Hanan H. Mohamed, Nuhad A. Alomair, Detlef W. Bahnemann
ARABIAN JOURNAL OF CHEMISTRY
(2019)
Article
Chemistry, Multidisciplinary
Hanan H. Mohamed, Aamerah A. Alsanea
ARABIAN JOURNAL OF CHEMISTRY
(2020)
Article
Environmental Sciences
Hanan H. Mohamed, Amerah A. Alsanea, Nuhad A. Alomair, Sultan Akhtar, Detlef W. Bahnemann
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2019)
Article
Chemistry, Physical
Hanan H. Mohamed, Nuhad A. Alomair, Sultan Alchtar, Tamer E. Youssef
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2019)
Article
Chemistry, Physical
Fatimah Al Qarni, Nuhad A. Alomair, Hanan H. Mohamed
Article
Materials Science, Multidisciplinary
Hanan H. Mohamed, Fatimah Al Qarni, Nuhad A. Alomair
Summary: Green and porous Ga3+ doped TiO2 nanostructures were successfully prepared using plant waste extract and ultrasonic irradiation, exhibiting enhanced photocatalytic activity. The incorporation of Ga3+ ions in TiO2 crystal was successful, with the best result obtained for 0.5 wt.% of Ga.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Materials Science, Ceramics
Dina H. A. Besisa, Emad M. M. Ewais, Hanan H. Mohamed
Summary: This work proposes a new high temperature composite material based on black Al2O3/CuO ceramics, which is produced with a simple and low-cost method. CuO is added to alumina to enhance its sinterability and properties for solar energy absorption. The study includes a detailed investigation of the material processing and evaluation of its phase composition, densification, and microstructural features. Thermal properties and mechanical durability are optimized to ensure the sustainability of the material. The results show that the addition of a small percentage of CuO to Al2O3 significantly enhances its densification, microstructure, thermal and mechanical properties. The composite with 10 wt% CuO exhibits the highest thermal conductivity, best thermal emissivity, lowest thermal expansion, outstanding thermal shock resistance, and mechanical durability. Therefore, Al2O3/CuO composites can be considered as a promising material for high temperature solar receivers.
CERAMICS INTERNATIONAL
(2022)
Article
Environmental Sciences
Dina H. A. Besisa, Hanan H. Mohamed, Emad M. M. Ewais, Yasser M. Z. Ahmed, Amira M. M. Amin
Summary: This study introduces new ceramics/glass composites made from industrial lead silicate glass (LSG) wastes. By adding chromia Cr2O3 and hematite Fe2O3 ceramics, the hazardous waste materials are converted into advanced optical materials with improved morphological properties and optical and magnetic behaviors. The results show that the composite with 30% of Cr2O3/Fe2O3 has the highest optical absorbance, the lowest band gap energy, the highest refractive index, and the best magnetic behavior.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Hanan H. Mohamed, Tamer E. Youssef
Summary: Au/TiO2 and Pt/TiO2 nanocomposites were synthesized using a green method. The Au and Pt nanoparticles were anchored on TiO2 nanorods by mixing their corresponding metal ions with a corn husk extract solution. The nanomaterials showed enhanced visible light harvesting capability and photocatalytic activity, especially for Au/TiO2 due to the surface plasmon resonance of Au nanoparticles. The nanocomposites also exhibited antimicrobial activity against Escherichia coli under solar light irradiation.
CANADIAN JOURNAL OF CHEMISTRY
(2022)
Article
Environmental Sciences
Hanan H. Mohamed, Dina H. A. Besisa
Summary: In this work, Ti-doped Fe2O3 with a hollow ellipsoidal capsules nanostructure was prepared using plant extract. The nanomaterial exhibited enhanced photocatalytic activity for the degradation of dyes and herbicides.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Hanan H. Mohamed, Ghaidaa Wazan, Dina H. A. Besisa
Summary: In this study, natural clay samples from Mecca province were prepared and characterized. The clay samples were found to be multi-metal oxides and doped with various elements. The results showed that the clay materials exhibited superior photocatalytic activity compared to pure TiO2, making them potential green standalone photocatalysts for environmental and energy applications.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Silviya Elanthikkal, Hanan H. Mohamed, Nuhad A. Alomair
Summary: There is a potential to extract pure silica nanoparticles from date palm biomass ash (DPBA) and use them in photocatalysis. The chemical sol-gel method or thermal combustion method can be employed for the extraction of silica. The chemically synthesized biosilica samples exhibited higher purity and surface area compared to the thermally prepared samples. These extracted biosilica samples showed efficient photodegradation of the bromophenol blue dye in water.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Applied
Hanan H. Mohamed, Tamer E. Youssef, Doaa Abdel Fadeel
Summary: In this study, ZnO, ZnO/CdO, and magnetic Ni-ZnO/CdO nanocomposites were synthesized using eco-friendly materials instead of hazardous chemicals. The anticancer drug, Doxorubicin, was loaded onto the biomimetic nanomaterials. The results showed that the Ni-ZnO/CdO nanocomposite exhibited slower and more sustained release of Dox compared to the other nanomaterials, leading to higher cytotoxicity against HEPG2 cancer cells. These findings suggest that the Ni-ZnO/CdO nanocarriers could be promising candidates for anticancer drug delivery systems.
BIOINTERFACE RESEARCH IN APPLIED CHEMISTRY
(2023)
Article
Multidisciplinary Sciences
Hanan H. Mohamed, Fatima Al Qarni, Nuhad A. Alomair, Sultan Akhtar
Summary: Indium-doped titanium oxide (In-TiO2) nanostructure with macro- and microporosity was synthesized using a green method, showing improved photocatalytic activity for degradation of organic pollutants and antibacterial activity against E-Coli. The enhancement in activity is attributed to the combined effect of doping for charge carrier separation and effective charge transfer due to macro-/microporosity.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2021)
Article
Pharmacology & Pharmacy
Asma M. Elsharif, Tamer E. Youssef, Suhailah S. Al-Jameel, Hanan H. Mohamed, Mohammad Azam Ansari, Suriya Rehman, Sultan Akhtar
ADVANCES IN PHARMACOLOGICAL SCIENCES
(2019)
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)
