ChemPhotoChem最新文献_第4页

Fast and Efficient Red-Absorbing Photoswitching Proteins Based on Flavin–Ligand Charge Transfer Complexes 基于黄素配体电荷转移配合物的快速高效吸红光开关蛋白

IF 3 4区化学

ChemPhotoChem Pub Date : 2025-02-11 DOI: 10.1002/cptc.202500012

Bo Zhuang, Ursula Liebl, Marten H. Vos, Michel Sliwa

{"title":"Fast and Efficient Red-Absorbing Photoswitching Proteins Based on Flavin–Ligand Charge Transfer Complexes","authors":"Bo Zhuang, Ursula Liebl, Marten H. Vos, Michel Sliwa","doi":"10.1002/cptc.202500012","DOIUrl":"https://doi.org/10.1002/cptc.202500012","url":null,"abstract":"Recently a novel class of reversible protein photoswitches has been discovered that is based on a charge transfer (CT) complex composed of the flavin cofactor and a substrate-analogue inhibitor molecule in the family of sarcosine oxidase flavoproteins. Here, excitation of the CT band results in barrierless dissociation of the CT complex on the femtosecond timescale followed by its thermally activated reformation, on the timescale of a few nanoseconds at ambient temperature. The photoreaction is thought to involve a well-defined isomerization of the inhibitor without its dissociation from the protein. This reaction occurs with an unusually high quantum yield (~80 %), is initiated by absorption in the red part of the visible absorption spectrum, and leads to a photoproduct absorbing in the blue spectral region (negative photochromism). Therefore, this class of photoswitches can be considered a promising template for developing a new class of fast negative photochromic compounds for Life Science applications provided the lifetime of the photoproducts (‘light state’) can be prolonged. Potential future developments will be discussed.","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"9 6","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144273481","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}

引用次数: 0

Simultaneous Optimization of Both Electrocyclization and Cycloreversion Reactions of Diarylethene Photoswitches for Solar-Energy Storage 太阳能储能用二芳烯光开关电环化和环还原反应的同时优化

IF 3 4区化学

ChemPhotoChem Pub Date : 2025-02-11 DOI: 10.1002/cptc.202400418

Dr. Jun Wang, Thillaiarasi Sukumar, Dr. D. Sravanakumar Perumalla, Dr. Baswanth Oruganti, Prof. Bo Durbeej

{"title":"Simultaneous Optimization of Both Electrocyclization and Cycloreversion Reactions of Diarylethene Photoswitches for Solar-Energy Storage","authors":"Dr. Jun Wang, Thillaiarasi Sukumar, Dr. D. Sravanakumar Perumalla, Dr. Baswanth Oruganti, Prof. Bo Durbeej","doi":"10.1002/cptc.202400418","DOIUrl":"https://doi.org/10.1002/cptc.202400418","url":null,"abstract":"A popular approach to developing molecular solutions for solar-energy storage is based on exploiting the reactions of molecular photoswitches. However, given that the reactions in question are usually the reverse of one another, it becomes imperative to handle conflicting performance criteria when optimizing the reactions. Here, studying diarylethene switches operated by electrocyclization (for storing the solar energy) and cycloreversion (for releasing the solar energy) reactions, we show that these processes can be made to simultaneously exhibit the desired characteristics by introducing a tricyclic rather than monocyclic π-linker as the bridge between the two aryl units. Specifically, we perform quantum chemical calculations to demonstrate that such a scenario is realizable by tailoring, using aromaticity, certain parts of the tricyclic structure for electrocyclization and other parts for cycloreversion. Furthermore, employing this strategy, we identify several diarylethene switches, each with their own unique tricyclic π-linker, that concurrently meet key performance criteria like large energy-storage densities and long energy-storage times. Accordingly, we conclude that there appears to be considerable structural flexibility in implementing the ideas for efficient diarylethene-based solar-energy storage put forth in this work.","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"9 6","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cptc.202400418","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144273137","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}

引用次数: 0

Environment-Dependent Ultrafast Photodynamics of Aurone Derivatives for the Photoprotection of Agrochemicals 用于农药光防护的紫外光酮衍生物的环境依赖超快光动力学

IF 3 4区化学

ChemPhotoChem Pub Date : 2025-02-11 DOI: 10.1002/cptc.202400402

Michael Hymas, Jack Dalton, Dr. Benjamin Rioux, Dr. Amandine L. Flourat, Prof. Florent Allais, Dr. Reza Omidyan, Prof. Vasilios G. Stavros

{"title":"Environment-Dependent Ultrafast Photodynamics of Aurone Derivatives for the Photoprotection of Agrochemicals","authors":"Michael Hymas, Jack Dalton, Dr. Benjamin Rioux, Dr. Amandine L. Flourat, Prof. Florent Allais, Dr. Reza Omidyan, Prof. Vasilios G. Stavros","doi":"10.1002/cptc.202400402","DOIUrl":"https://doi.org/10.1002/cptc.202400402","url":null,"abstract":"Derivatised aurones, based on phytochemical flavonoids, were synthesised and studied using steady-state and ultrafast spectroscopy techniques. Aurones’ strong ultraviolet (UV) and visible absorption, in addition to being found in abundance in fruits, vegetables and flowers, makes them ideal photoprotection candidates for agrochemicals. Agrochemicals are well known to exhibit poor photostability, and the addition of photoprotectants to their formulations thus increases their longevity, and thereby environmental sustainability. The results presented here shed light on the complex ultrafast and long term photodynamics of five nature-inspired derivatives in solution and on a wax surface, the latter designed to mimic the cuticle of a plant leaf. This study finds markedly different relaxation mechanisms between these condensed phase environments, highlighting the importance of studying photoprotectants in their real-world environments. These findings inspire the development of safe and effective photoprotectants for agrochemicals.","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"9 6","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cptc.202400402","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144273136","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}

引用次数: 0

Reversing the Solvent Polarity Effect on Fluorescence Quantum Yields of a GFP Chromophore Analogue by Inhibiting the Polarity-Promoted Hula Twist 通过抑制极性促进的呼拉扭逆转溶剂极性对GFP发色团类似物荧光量子产率的影响

IF 3 4区化学

ChemPhotoChem Pub Date : 2025-02-10 DOI: 10.1002/cptc.202400400

Chun-Wei Chiu, Li-Ling Tsao, Hsuan-Yu Lin, Yi-Hung Liu, Marco Raabe, Ching-Wei Lin, Yuan-Chung Cheng, Jye-Shane Yang

{"title":"Reversing the Solvent Polarity Effect on Fluorescence Quantum Yields of a GFP Chromophore Analogue by Inhibiting the Polarity-Promoted Hula Twist","authors":"Chun-Wei Chiu, Li-Ling Tsao, Hsuan-Yu Lin, Yi-Hung Liu, Marco Raabe, Ching-Wei Lin, Yuan-Chung Cheng, Jye-Shane Yang","doi":"10.1002/cptc.202400400","DOIUrl":"https://doi.org/10.1002/cptc.202400400","url":null,"abstract":"Flexible solvatochromic fluorescent dyes (SFD) typically exhibit a decrease in fluorescence quantum yield (ΦF) and a red shift in fluorescence with increasing solvent polarity. In this study, we report a new E,Z-isomerization-active green fluorescence protein chromophore (GFPc) analogue (4), which uniquely demonstrates a reversed solvent polarity effect on ΦF and a record-high ΦF of 0.43 in the red (>600 nm) region. This is achieved by ring-bridging both the exocyclic C−C bond (the ϕ-bond) and the phenyl-amino C−N bond (the ω-bond) of a known meta-amino-substituted GFPc (1), which shows typical SFD behavior in aprotic solvents but fluorescence quenching in protic solvents. Based on the reference compounds 2 (ω-bridged) and 3 (ϕ-bridged), the reversed solvent effect is attributed to enhanced one-bond-flip (OBF) E,Z-isomerization in nonpolar solvents and the inhibition of hula twist (HT) pathway, which is accelerated in polar solvents. The drastic difference in fluorescence characteristics between 1 and 4 is further underscored by the superior performance of 4 in cell imaging. This work demonstrates the versatility of the GFP chromophore, whose properties could be drastically reshaped through specific structural editing at key positions.","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"9 6","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144273133","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}

引用次数: 0

Front Cover: Covalent Organic Framework (COF) Based Catalysts for Photocatalytic Cross-Dehydrogenative Coupling Reactions (ChemPhotoChem 2/2025) 封面：基于共价有机框架（COF）的光催化交叉脱氢偶联反应催化剂（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}

引用次数: 0

Formation of a Hemispherical Droplet in a Temperature Responsive Ionic Liquid by Optical Tweezers 光镊在温度响应离子液体中形成半球形液滴

IF 3 4区化学

ChemPhotoChem Pub Date : 2025-02-09 DOI: 10.1002/cptc.202400394

Rai Kobayashi, Prof. Dr. Yasuyuki Tsuboi, Dr. Ken-ichi Yuyama

引用次数: 0

Enhancing Spectral Coverage, Efficiency, and Photometric Accuracy in Ultrafast Fluorescence Upconversion Spectroscopy 在超快荧光上转换光谱中增强光谱覆盖、效率和光度准确性

IF 3 4区化学

ChemPhotoChem Pub Date : 2025-02-03 DOI: 10.1002/cptc.202400398

Marco Kapitzke, Dr. Samuel Palato, Amar Raj, Dr. Tatu Kumpulainen, Prof. Dr. Julia Stähler

{"title":"Enhancing Spectral Coverage, Efficiency, and Photometric Accuracy in Ultrafast Fluorescence Upconversion Spectroscopy","authors":"Marco Kapitzke, Dr. Samuel Palato, Amar Raj, Dr. Tatu Kumpulainen, Prof. Dr. Julia Stähler","doi":"10.1002/cptc.202400398","DOIUrl":"https://doi.org/10.1002/cptc.202400398","url":null,"abstract":"Time-resolved fluorescence techniques are essential for studying the excited-state dynamics of molecules and materials, as well as their interactions with the surrounding media. Fluorescence upconversion provides femtosecond time resolution, but its limited spectral coverage often restricts its application. Broadband variants of fluorescence upconversion spectroscopy (FLUPS) offer improved spectral coverage but require balancing spectral bandwidth against signal strength. In this paper, we introduce a three-angle method (3-AM) for FLUPS designed to overcome these limitations. This method enhances spectral coverage, photometric accuracy, and signal-to-noise ratio by recording and averaging spectrally resolved upconversion signals at three distinct crystal angles. Unlike other techniques that rely on spectral reconstruction or continuous crystal rotation during acquisition, the 3-AM relies on fixed crystal positions, allowing for robust post-acquisition corrections. We validate the performance and reproducibility of the 3-AM by comparing it with the conventional fixed-angle approach, as well as through blind testing in two independent laboratories. Despite variations in experimental configuration, the 3-AM consistently produces reproducible spectral line shapes across the two setups. The enhanced performance and reliability demonstrate its practicality for laboratories with broadband FLUPS capabilities. Thus, the 3-AM is a valuable tool for investigating ultrafast radiative processes in previously inaccessible molecular and material systems.","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"9 5","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cptc.202400398","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143938804","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}

引用次数: 0

Self-Assembly of the Co-Catalysts of a Dual Photoredox/Hydrogen Atom Transfer Catalytic Process: Curiosity or Opportunity? 双光氧化还原/氢原子转移催化过程中共催化剂的自组装：好奇还是机遇？

IF 3 4区化学

ChemPhotoChem Pub Date : 2025-01-28 DOI: 10.1002/cptc.202400406

Victor Carré, Jean-Marc Vincent

引用次数: 0

Emissive Bovine Serum Albumin-Templated Osmium Nanoclusters: Synthesis and Optical Characterization 发射牛血清白蛋白模板纳米锇团簇：合成和光学表征

IF 3 4区化学

ChemPhotoChem Pub Date : 2025-01-27 DOI: 10.1002/cptc.202400412

Mohammad Tavakkoli Yaraki, Aarti, Muhammad A. Zenaidee, Dechao Chen, Chao Shen, Qin Li, Koushik Venkatesan, Yuling Wang

{"title":"Emissive Bovine Serum Albumin-Templated Osmium Nanoclusters: Synthesis and Optical Characterization","authors":"Mohammad Tavakkoli Yaraki,  Aarti, Muhammad A. Zenaidee, Dechao Chen, Chao Shen, Qin Li, Koushik Venkatesan, Yuling Wang","doi":"10.1002/cptc.202400412","DOIUrl":"https://doi.org/10.1002/cptc.202400412","url":null,"abstract":"Synthesis of new nanomaterials with unique optical properties is of great importance in different fields such as energy, material science, and biomedicine. Here, for the first time, we report the synthesis of the emissive osmium nanoclusters (OsNCs) using bovine serum albumin (BSA) as template and sodium borohydride as strong reducing agent. The as-synthesized emissive OsNCs had only 31 atoms, with deep-blue color emission with an emission maximum at 415 nm and a photoluminescence quantum yield (PLQY) of 2.5 %. The fluorescence emission of OsNCs could be attributed to the smaller number of atoms (31) in the as-synthesized OsNCs in this work. The optical characterization of the emissive OsNCs revealed that the fluorescence intensity was more sensitive to pH than with temperature of the solution. When pH was increased from 1–12, there was 6-fold increase in the emission intensity. We believe that the presented synthesis route as well as the results of this work could open new avenues to further investigate the OsNCs as new emissive nanomaterials and their potential applications in biomedical and energy fields.","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"9 5","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143939580","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}

引用次数: 0

The Multiple Facets of Oxalate Dianion in Photochemistry 草酸钠在光化学中的多面性

IF 3 4区化学

ChemPhotoChem Pub Date : 2025-01-27 DOI: 10.1002/cptc.202400407

Dr. Camilla Russo, Carmine Volpe, Dr. Mariateresa Giustiniano

引用次数: 0