{"title":"Polarity-Insensitive Triphenylmethyl-Type Luminescent Organic Radicals with Simple Benzene Derivative Substitution","authors":"Zhuoyang Hu, Mehrigul Abdulahat, Zhaoze Ding, Fudong Ma, Xuanwan Li, Ayixiemuguli Tuersun, Ablikim Obolda, Haoqing Guo","doi":"10.1002/cptc.202500105","DOIUrl":"10.1002/cptc.202500105","url":null,"abstract":"<p>This study focuses on the impact of alternant phenyl substituents on the photophysical properties of tris-(2,4,6-trichlorophenyl)methyl (TTM)-type radicals. Most donor–acceptor-type luminescent systems show solvent-polarity sensitivity, which limits their applications. Herein, three alternate π-conjugated biphenyl/terphenyl substituents are attached to the TTM unit. Results reveal that connection modes and types of benzene ring derivatives lead to distinct charge transfer (CT) and locally excited state hybrid emitters due to the differences in conjugation degree. All three radicals exhibit polarity-insensitive red emission (626–690 nm), and their photoluminescence quantum yields (PLQYs) increase with solvent polarity. Specifically, linear-conjugated TTM-DPh has higher photostability but lower PLQY, while nonlinear-conjugated TTM-3DPh and TTM-TPh have nearly 10-fold higher PLQYs. The photophysical studies suggest that the conjugation degree and hybridization level between CT and ground states account for these properties.</p>","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"9 8","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144870035","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}
{"title":"Mechanistic and Physicochemical Insights into the Photoactivation Pathways of a Charge Transfer ATRP Photoinitiator","authors":"Bénédicte Grebille, Lhoussain Khrouz, Jean-Christophe Mulatier, Christophe Bucher, Emmanuel Lacôte, Magalie Schoumacker, Elodie Bourgeat-Lami, Muriel Lansalot, Philippe Fioux, Hanine Kalout, Jacques Lalevée, Akos Banyasz, Cyrille Monnereau, Chantal Andraud","doi":"10.1002/cptc.202500074","DOIUrl":"10.1002/cptc.202500074","url":null,"abstract":"<p>Photochemistry has revolutionized the chemical industry by introducing sustainable and energy-efficient processes that are vital for the manufacture of advanced materials which align with Industry 4.0 standards. Among photochemical techniques, photopolymerization stands out as a rapid, controlled, and eco-friendly approach, making it particularly suitable for applications like 3D printing. This research in two-photon-induced photopolymerization for 3D microfabrication led to groundbreaking performance, thanks to the use of custom <i>π-</i>extended molecular architectures as photoinitiators. Building on these results, a photoactivable initiation system for photoinduced-atom transfer radical polymerization (photoATRP) is now reported using a similar <i>π</i>-extended photoinitiator. Through comprehensive optimization, we successfully created a functional multicomponent photoinitiating system, with its detailed mechanism thoroughly established in solution. By covalently attaching alkyl halides to glass surfaces, we were able to implement the surface-induced photo-ATRP technique to create customized brush polymer architectures. This work not only advances the understanding of photoATRP mechanisms but also introduces new strategies for functional surface engineering, with potential applications in two-photon-induced surface modification of 3D/4D structures via photoATRP.</p>","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"9 8","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/cptc.202500074","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144870043","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}
ChemPhotoChemPub Date : 2025-05-21DOI: 10.1002/cptc.202500093
Xiaoyuan Liu, Xiaobei Shi, Ziyan Zhang, Jiang Jiang, Qiangbin Wang
{"title":"Photothermally Enhanced Photocatalytic Glycerol Oxidation on AuPt/MnO2-Mn3O4","authors":"Xiaoyuan Liu, Xiaobei Shi, Ziyan Zhang, Jiang Jiang, Qiangbin Wang","doi":"10.1002/cptc.202500093","DOIUrl":"10.1002/cptc.202500093","url":null,"abstract":"<p>Photocatalytic valorization of glycerol to value-added chemicals under ambient conditions is a promising approach for economically feasible and environmentally friendly biomass utilization. Herein, the successful synthesis of ≈2.6 nm AuPt alloy nanoparticles supported on MnO<sub>2</sub>-Mn<sub>3</sub>O<sub>4</sub> heterostructures via in situ transformation of α-MnO<sub>2</sub> is reported. Selective aerobic photocatalytic glycerol oxidation toward value-added C3 products has been achieved with AM 1.5G light irradiation under ambient conditions on these as synthesized 1 wt% AuPt/MnO<sub>2</sub>-Mn<sub>3</sub>O<sub>4</sub>, which displays 2.3 and 6.5 times enhancement compared to that of AuPt/Mn<sub>3</sub>O<sub>4</sub> and AuPt/MnO<sub>2</sub>. A 74% overall C3 product selectivity (60% in terms of glyceric acid) has been achieved at 75% glycerol conversion after 4 h of photocatalytic reaction. Investigation results reveal that the formation of MnO<sub>2</sub>-Mn<sub>3</sub>O<sub>4</sub> heterostructures combines the local photothermal heating (primarily on MnO<sub>2</sub>) synergistically with the photochemical catalysis (on Mn<sub>3</sub>O<sub>4</sub>), thus achieving enhanced photocatalytic glycerol oxidation. This study may provide guidance for future catalyst design, where photon-driven photocatalysis with phonon-driven photothermal effect can be seamlessly integrated to achieve maximal solar energy utilization and high photocatalytic efficiency.</p>","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"9 8","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144870034","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}
ChemPhotoChemPub Date : 2025-05-20DOI: 10.1002/cptc.202500072
Xihu Wang, Tianwei Jin, Zhi Lu, Junjie Gao, Xiaona Chai, Chaoyang Tu, Jun li, Jinyu Hu
{"title":"A NaGdGeO: Tm3+, Dy3+ Phosphor with Anomalous Thermal Quenching for Use in WLEDs","authors":"Xihu Wang, Tianwei Jin, Zhi Lu, Junjie Gao, Xiaona Chai, Chaoyang Tu, Jun li, Jinyu Hu","doi":"10.1002/cptc.202500072","DOIUrl":"10.1002/cptc.202500072","url":null,"abstract":"<p>A series of novel NaGdGeO<sub>4</sub>: Tm<sup>3+</sup>, Dy<sup>3+</sup> phosphors are prepared by a facile high-temperature solid-state method. By continuously adjusting the Dy/Tm ion concentrations, the white light emission with adjustable color temperature and color coordinate is achieved excited by the wavelength of 354 nm. The energy transfer mechanism between sensitized ions and activated ions is discussed with the help of fluorescence spectra and decay curve in details. Notably, different from other phosphors based on this host material, these prepared phosphors exhibit typical anomalous thermal quenching. It is very favorable for the devices working at high temperature. And this phenomenon may benefit from the high energy transfer efficiency at higher temperatures. The tunable white light and anomalous thermal quenching indicate that the studied material is a promising solid-state emitting phosphor for the white light-emitting diodes.</p>","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"9 8","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144869915","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}
{"title":"Trifluoroacetylated Trimethine, Pentamethine, and Heptamethine Cyanine Dyes: Syntheses, Structures, and Photochemical Properties","authors":"Yuya Yamada, Ayumi Okamoto, Shota Mizuno, Taro Udagawa, Tomohiro Agou, Yasuhiro Kubota, Toshiyasu Inuzuka, Kazumasa Funabiki","doi":"10.1002/cptc.202500006","DOIUrl":"10.1002/cptc.202500006","url":null,"abstract":"<p>Polymethine cyanine dyes have a heterocyclic structure containing nitrogen at both ends of the polymethine chain. They have been extensively investigated in material sciences for numerous applications. The synthesis of cyanine dyes with various functional groups on the methine chain has attracted significant attention because it significantly alters the properties of the dye. However, few synthetic methods have been reported for directly introducing groups onto the methine chains of cyanine dyes. Ketone functional groups are essential in synthetic organic chemistry, biochemistry, and materials chemistry. However, there are no reports on the direct introduction of ketone groups into cyanine dyes. Trifluoroacetylation is performed on the methine chains of polymethine cyanine dyes. This is achieved by directly using anhydrous trifluoroacetic acid to synthesize trifluoroacetylated trimethine, pentamethine, and heptamethine cyanine dyes in good yields. Single-crystal X-ray structural analysis is performed to determine the substitution positions in the synthesized dyes. The results reveal that trifluoroacetylation of the methine chain shortens the maximum absorption wavelength and decreases the molar absorption coefficient in dichloromethane solution and poly(methyl methacrylate) film compared to an unsubstituted cyanine dye, and decreases the fluorescence quantum yield. This study highlights the unique properties of trifluoroacetylated polymethine cyanine dyes.</p>","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"9 8","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/cptc.202500006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144869916","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}
ChemPhotoChemPub Date : 2025-05-20DOI: 10.1002/cptc.202500002
Zhen Yang, Olof Ramström
{"title":"Design of Enaminitrile Switches with Enhanced Protofluorochromic Properties","authors":"Zhen Yang, Olof Ramström","doi":"10.1002/cptc.202500002","DOIUrl":"10.1002/cptc.202500002","url":null,"abstract":"<p>Functional switches exhibiting distinct functionalities responding to a specific stimulus are highly desirable for fabricating advanced devices with superior dynamic performances. Herein, a series of enaminitrile switches are explored as protofluorochromic entities by modulation of their structures, assisted by density functional theory calculations. The switches show high stabilities and exhibit reversible <i>E</i>/<i>Z</i> isomerization behavior, along with tunable fluorescence intensity in both protic and aprotic media. Switches based on 2-pyridyl- or 2-pyridylmethyl-containing <i>N</i>-components exhibit strong fluorescence in their protonated <i>Z</i>-configurations, compared to their phenyl/benzyl counterparts. This behavior can be attributed to variations in intramolecular charge transfer or excited-state intramolecular proton transfer effects. The <i>Z</i>-isomers are furthermore studied in their aggregated solid/film/dispersion states, resulting in notable aggregation-induced emission behavior.</p>","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"9 8","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/cptc.202500002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144869917","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}
{"title":"Anti-Kasha Emission in Organic Radicals: Mechanistic Insights and Experimental Caveats","authors":"Yujie Zhu, Zihao Zhu, Shengjie Wang, Zhiyuan Kuang, Qiming Peng, Alim Abdurahman","doi":"10.1002/cptc.202500118","DOIUrl":"10.1002/cptc.202500118","url":null,"abstract":"<p>Organic radicals have recently emerged as promising candidates for luminescent materials, often exhibiting emissions that challenge the traditional Kasha's rule. While a growing number of reports claim anti-Kasha emission from higher excited states in radicals, the photophysical origins of such emissions remain ambiguous. In this Concept, we critically assess the mechanistic underpinnings of anti-Kasha behavior in radical systems and highlight the experimental caveats that may lead to misinterpretation—including emission from closed-shell impurities, photodegradation byproducts, or incomplete radical formation. By revisiting key examples and providing a framework for rigorous spectral validation, this article aims to recalibrate the standards of evidence in radical photophysics and guide the development of reliable design strategies for high-energy emitters.</p>","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"9 8","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144869574","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}
ChemPhotoChemPub Date : 2025-05-13DOI: 10.1002/cptc.202500003
Nitin P. Prasad, Sven Schneider, Clément Maheu, Chuanmu Tian, Jan P. Hofmann, Emiel J. M. Hensen, Anja Bieberle-Hütter
{"title":"Enhancing Photocurrent of Bismuth Manganate Photoanodes with Nanoislands of Bismuth Oxide","authors":"Nitin P. Prasad, Sven Schneider, Clément Maheu, Chuanmu Tian, Jan P. Hofmann, Emiel J. M. Hensen, Anja Bieberle-Hütter","doi":"10.1002/cptc.202500003","DOIUrl":"10.1002/cptc.202500003","url":null,"abstract":"<p>Photoelectrochemical (PEC) water splitting is a promising method for the energy transition. However, it is still hampered because the performance of the electrodes is too low. Herein, bismuth manganate (BMO) is investigated as a photoanode absorber material for PEC. BMO thin films are prepared by a sol–gel method with and without a bismuth oxide (BO) overlayer. It is found that the BO overlayer forms BO nanoislands after annealing. Under visible light illumination, BMO with BO nanoislands results in a nearly tenfold increase of the current density compared to pristine BMO at the same applied potential. This increased performance is related to a decrease in the charge transfer resistance and in the amount of recombinations based on the formation of a favorable heterojunction between BMO and BO. The application of overlayers on electrode materials in combination with suitable band alignment is an effective strategy to improve the performance of PEC electrodes.</p>","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"9 8","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/cptc.202500003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144869379","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}
ChemPhotoChemPub Date : 2025-05-12DOI: 10.1002/cptc.202580501
Rai Kobayashi, Prof. Dr. Yasuyuki Tsuboi, Dr. Ken-ichi Yuyama
{"title":"Front Cover: Formation of a Hemispherical Droplet in a Temperature Responsive Ionic Liquid by Optical Tweezers (ChemPhotoChem 5/2025)","authors":"Rai Kobayashi, Prof. Dr. Yasuyuki Tsuboi, Dr. Ken-ichi Yuyama","doi":"10.1002/cptc.202580501","DOIUrl":"10.1002/cptc.202580501","url":null,"abstract":"<p><b>The Front Cover</b> illustrates a microdroplet formed in a temperature responsive ionic liquid aqueous solution under the laser irradiation. Upon focusing a near-infrared laser beam onto the glass/solution interface, a single liquid droplet is formed due to optical trapping and a photothermal effect. The resultant droplet deposits on the substrate, exhibiting a hemispherical shape. The hemispherical droplet can extract and condense molecules due to high ionic liquid concentration, which is confirmed by Raman and fluorescence spectroscopic analysis. The current approach offers a new methodology with which to collect and perform microanalysis on tiny amounts of substances. More information can be found in the Research Article by Ken-ichi Yuyama and co-workers (DOI: 10.1002/cptc.202400394).\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure>\u0000 </p>","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"9 5","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cptc.202580501","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143939122","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}
{"title":"Enhanced Performance of NiO-Based Dye-Sensitized Solar Cells Using a Covalent Porphyrin-C60 Dyad","authors":"Asterios Charisiadis, Vasilis Nikolaou, Aurélien Planchat, Yann Pellegrin, Georgios Charalambidis, Fabrice Odobel, Athanassios G. Coutsolelos","doi":"10.1002/cptc.202500075","DOIUrl":"10.1002/cptc.202500075","url":null,"abstract":"<p>This study presents the synthesis and the characterization of a new covalent zinc porphyrin-fullerene (ZnP-C<sub>60</sub>) dyad, featuring a π-conjugated bridge to link the donor (ZnP) and the acceptor (C<sub>60</sub>). This system, along with a couple more reference compounds, namely <b>ZnP-3DoH-COOH</b> and <b>C</b><sub><b>60</b></sub><i><b>tr</b></i><b>ZnPCOOH</b>, is tested as photosensitizers in <i>p</i>-type dye-sensitized solar cells (<i>p</i>-DSSCs). Photophysical studies, including absorption and emission spectroscopy, reveal strong electronic communication between the porphyrin core and the fullerene unit, corroborated by theoretical calculations demonstrating efficient electron transfer from the donor to the acceptor. Electrochemical measurements, supported by theoretical insights, confirm that the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital(LUMO) energy levels of the <b>C</b><sub><b>60</b></sub><b>-3PV-ZnP-2DoH-COOH</b> dyad are well aligned for effective integration into NiO-based DSSCs. Notably, photovoltaic performance measurements show that solar cells sensitized with the covalent dyad exhibit significantly enhanced efficiencies compared with those using the reference compounds and other “ZnP-Acceptor” dyads. These findings highlight the potential of covalent ZnPor-C<sub>60</sub> assemblies in advancing the design of high-performance <i>p</i>-type DSSCs.</p>","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"9 7","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cptc.202500075","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144672863","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}