ChemPhotoChem最新文献

Front Cover: (ChemPhotoChem 3/2025)

IF 3 4区化学

ChemPhotoChem Pub Date : 2025-03-11 DOI: 10.1002/cptc.202580301

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Front Cover: Covalent Organic Framework (COF) Based Catalysts for Photocatalytic Cross-Dehydrogenative Coupling Reactions (ChemPhotoChem 2/2025)

IF 3 4区化学

ChemPhotoChem Pub Date : 2025-02-10 DOI: 10.1002/cptc.202580201

Jing Zhang, Bin Guo, Zhuo-Lin Tong, David J. Young, Hong-Xi Li

{"title":"Front Cover: Covalent Organic Framework (COF) Based Catalysts for Photocatalytic Cross-Dehydrogenative Coupling Reactions (ChemPhotoChem 2/2025)","authors":"Jing Zhang, Bin Guo, Zhuo-Lin Tong, David J. Young, Hong-Xi Li","doi":"10.1002/cptc.202580201","DOIUrl":"https://doi.org/10.1002/cptc.202580201","url":null,"abstract":"The Front Cover illustrates the micro-environments associated with photocatalytic cross-dehydrogenative coupling (CDC) reactions, wherein covalent organic frameworks (COFs) function as heterogeneous catalysts. COFs exhibit favorable photocatalytic activity in diverse chemical transformations, owing to their remarkable high crystallinity, excellent stability, and convenient recyclability. The CDC reactions represent an efficient and clean methodology for the formation of C-Nu (Nu = nucleophilic reagent) bonds through activation of C-H and Nu-H bonds, respectively. As expected, the robust COFs offer a highly versatile platform for heterogeneous photocatalytic CDC reactions. More information can be found in the Concept article by Bin Guo, David J. Young, Hong-Xi Li, and co-workers (DOI: 10.1002/cptc.202400274).\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture>\u0000 </div>\u0000 </figure>\u0000 ","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"9 2","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cptc.202580201","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143380292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Front Cover: Organohalogenochromism: Toward Colorimetric Detection of Volatile Organic Halogen Compounds (ChemPhotoChem 1/2025)

IF 3 4区化学

ChemPhotoChem Pub Date : 2025-01-10 DOI: 10.1002/cptc.202580101

Kumpei Kozuka, Keiichi Imato, Yousuke Ooyama

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Purple Bacteria Reaction Center Based Solid State Bio-Solar Cell With a Large Open Circuit Voltage

IF 3 4区化学

ChemPhotoChem Pub Date : 2024-12-23 DOI: 10.1002/cptc.202400303

Dr. Tulus Tulus, Dr. Vincent Morris Friebe, Andreas Peukert, Dr. Loreta A. Muscarella, Prof. Michael R. Jones, Dr. Raoul N. Frese, Prof. Elizabeth von Hauff

{"title":"Purple Bacteria Reaction Center Based Solid State Bio-Solar Cell With a Large Open Circuit Voltage","authors":"Dr. Tulus Tulus, Dr. Vincent Morris Friebe, Andreas Peukert, Dr. Loreta A. Muscarella, Prof. Michael R. Jones, Dr. Raoul N. Frese, Prof. Elizabeth von Hauff","doi":"10.1002/cptc.202400303","DOIUrl":"https://doi.org/10.1002/cptc.202400303","url":null,"abstract":"A novel solid state bio-solar cell is demonstrated based on a purple bacterial reaction center-light harvesting 1 complex (RC-LH1) that exhibits high quantum efficiency and long carrier lifetimes. We demonstrate that careful choice of transport layers enables a high open circuit voltage of up to 0.3 V in these solid state biophotovoltaic devices. Electronic processes were investigated with impedance spectroscopy. Equivalent circuit modelling of impedance spectra obtained under illumination at DC offset voltages between open circuit and short circuit conditions revealed two relaxations on microsecond and millisecond time scales that are attributed to the charge transit time and carrier recombination processes, respectively. The operational stability of the solar cells was examined under constant illumination for over 3 hours and a burn-in time of several minutes was observed, after which operational parameters stabilized. This work is the largest voltage reported for RC-LH1 based solid state biophotovoltaic devices to date.","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"9 3","pages":""},"PeriodicalIF":3.0,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143595690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Photocatalytic Activity and Stability of Carbon Nitride-Pyrite Composites

IF 3 4区化学

ChemPhotoChem Pub Date : 2024-12-23 DOI: 10.1002/cptc.202400343

Julian Kaulbersch, Scott McGuigan, Jana Timm, Paul Maggard, Roland Marschall

{"title":"Photocatalytic Activity and Stability of Carbon Nitride-Pyrite Composites","authors":"Julian Kaulbersch, Scott McGuigan, Jana Timm, Paul Maggard, Roland Marschall","doi":"10.1002/cptc.202400343","DOIUrl":"https://doi.org/10.1002/cptc.202400343","url":null,"abstract":"In photocatalysis, the photoabsorber plays a crucial role in the reaction. The most important parameters are stability, cost and optical band gap. In this work, a prominent class of absorbers, namely carbon nitrides (CN), has been investigated. In the literature, CN is most often described as stable, although photodegradation has been observed. In order to retain the beneficial properties of CN while improving stability, a crystalline phase poly(triazine imide) (PTI) of carbon nitride was investigated and compared to polymeric CN in photocatalytic hydrogen generation experiments. In order to improve the charge separation for the photoinduced hydrogen evolution reaction, pyrite (FeS2) was used as a surface co-catalyst with a loading of 1, 5 and 10 wt %. At the same time, any photodegradation products in solution were investigated by ion chromatography. Interestingly, PTI shows hardly any photocorrosion compared to defective carbon nitride, indicating its higher photostability in hydrogen evolution experiments. However, FeS2 produces ammonium as a degradation product when synthesised from nitrogen-containing precursors. When made from nitrogen-free precursors, FeS2 together with photostable PTI releases little ammonia, making it a photostable, earth-abundant composite for photocatalytic hydrogen generation.","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"9 3","pages":""},"PeriodicalIF":3.0,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cptc.202400343","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143595691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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BODIPY-Based Small-Molecule Photoacoustic Probes for Biomedical Imaging

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ChemPhotoChem Pub Date : 2024-12-17 DOI: 10.1002/cptc.202400335

Kaixuan Song, Hu Gao, Xiaoqing Wang, Zhipeng Liu

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Photoelectrochemical Investigation of Hole Scavengers for Photocatalytic Hydrogen Evolution Reaction on Perovskite-Type Niobate Nanosheets

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ChemPhotoChem Pub Date : 2024-12-16 DOI: 10.1002/cptc.202400297

Bengisu Yilmaz, Uğur Ünal

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Advances in Artificial Photosynthesis: The Role of Chalcogenides and Chalcogenide-Based Heterostructures 人工光合作用的进展：卤化铝和卤化铝基异质结构的作用

IF 3 4区化学

ChemPhotoChem Pub Date : 2024-12-11 DOI: 10.1002/cptc.202400234

Ashmalina Rahman, Shaikh Parwaiz, Youngku Sohn, Mohammad Mansoob Khan

{"title":"Advances in Artificial Photosynthesis: The Role of Chalcogenides and Chalcogenide-Based Heterostructures","authors":"Ashmalina Rahman, Shaikh Parwaiz, Youngku Sohn, Mohammad Mansoob Khan","doi":"10.1002/cptc.202400234","DOIUrl":"https://doi.org/10.1002/cptc.202400234","url":null,"abstract":"Artificial photosynthesis, encompassing the photocatalytic generation of H2 and CO2 reduction innovations, seems to be a highly promising approach. This is due to its ability to efficiently transform CO2 into hydrocarbon fuel and valuable chemical products using solar energy as a direct energy source. This will simultaneously help to mitigate global warming and energy shortage issues. Chalcogenide-based semiconductors have recently gotten a lot of attention as an important area of research for photocatalytic H2 production and CO2 conversion, owing to their low band gap energy, suitable band structures, and a great photoresponsivity spectrum. Modifying chalcogenides into their heterostructures could be a great way to solve problems like photo corrosion and carrier recombination. Therefore, this review summarized a series of different modifications of chalcogenides and recent developments in their photocatalytic and photo electrocatalytic performance, particularly in H2 production and CO2 conversion. Lastly, we discussed the challenges, limitations, areas for development, and future prospects of chalcogenides and their heterostructures capable of utilizing visible light to produce H2 gas and reduce CO2.","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"9 3","pages":""},"PeriodicalIF":3.0,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143595060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Charge State Tuning and Photochemical Stability of Au25(SR)18 Nanoclusters

IF 3 4区化学

ChemPhotoChem Pub Date : 2024-12-10 DOI: 10.1002/cptc.202400236

Johanna A. de Jong, Mark S. Workentin, Mahdi Hesari

{"title":"Charge State Tuning and Photochemical Stability of Au25(SR)18 Nanoclusters","authors":"Johanna A. de Jong, Mark S. Workentin, Mahdi Hesari","doi":"10.1002/cptc.202400236","DOIUrl":"https://doi.org/10.1002/cptc.202400236","url":null,"abstract":"The photolysis of the gold nanoclusters Au25(SR)18z (R=C2H4Ph and C12H25, z=1−, 0 and 1+) NCs in halogenated solvents such as dichloromethane leads to changes in the charged states of the Au25(SR)18z observed using UV-Visible and 1H NMR spectroscopic techniques. Matrix-assisted laser desorption/ionization mass spectrometry results proved that during charge transformation from anion to neutral and eventually cation forms, the size of nanoclusters remains intact. Electrochemistry of Au25(SR)18 has enabled the monitoring of these changes by cyclic voltammetry, indicating decay in the redox peak current upon irradiation. In the absence of light and/or in a non-halogenated solvent, e. g., tetrahydrofuran, no substantial change in the photophysical signatures of Au25 nanoclusters was observed. These observations highlight the importance of selecting appropriate solvent(s) in the synthesis and photochemical studies of atomically precise metal nanoclusters and the possibility of using photochemistry in halogenated solvents to synthesize different charge states of atomically precise metal nanoclusters. Thus, other monodispersed molecule-like nanoclusters, with various sizes and charges, can be achieved via this photosynthetic protocol under controlled conditions, e. g., solvent, light, and photolysis duration.","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"9 3","pages":""},"PeriodicalIF":3.0,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143594909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Front Cover: Fluorene vs. Spirobifluorene: Effect of the π-System on TADF Properties (ChemPhotoChem 12/2024) 封面：芴与螺比芴：π-体系对TADF性能的影响（ChemPhotoChem 12/2024）

IF 3 4区化学

ChemPhotoChem Pub Date : 2024-12-10 DOI: 10.1002/cptc.202481201

Tim Silies, Nikos L. Doltsinis, Constantin G. Daniliuc, Fabio Rizzo

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