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Front Cover: Recent Advances in Luminescence of Platinum Complexes in the Near Infrared Second Window (ChemPhotoChem 6/2025) 封面:铂配合物在近红外第二窗口的发光研究进展(ChemPhotoChem 6/2025)
IF 3 4区 化学
ChemPhotoChem Pub Date : 2025-06-13 DOI: 10.1002/cptc.202580601
Shingo Hattori, Kazuteru Shinozaki
{"title":"Front Cover: Recent Advances in Luminescence of Platinum Complexes in the Near Infrared Second Window (ChemPhotoChem 6/2025)","authors":"Shingo Hattori,&nbsp;Kazuteru Shinozaki","doi":"10.1002/cptc.202580601","DOIUrl":"https://doi.org/10.1002/cptc.202580601","url":null,"abstract":"<p><b>The Front Cover</b> illustrates the light emission of the Pt(II) complex aggregate in a biological environment upon irradiation with near infrared (NIR) II laser light. The laser light can reach the deep tissue though the NIR II optical window, where the light scattering and absorption by water molecules and hemoglobin are suppressed, and directly excite the Pt(II) complex aggregate to operate as a photosensitizer in phototherapy and as a luminophore to play a role of a photoimaging agent. More information can be found in the Review Article by Shingo Hattori and Kazuteru Shinozaki (DOI: 10.1002/cptc.202500041).\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"9 6","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cptc.202580601","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144273409","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
Front Cover: Formation of a Hemispherical Droplet in a Temperature Responsive Ionic Liquid by Optical Tweezers (ChemPhotoChem 5/2025) 封面:用光镊在温度响应离子液体中形成半球形液滴(ChemPhotoChem 5/2025)
IF 3 4区 化学
ChemPhotoChem Pub Date : 2025-05-12 DOI: 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,&nbsp;Prof. Dr. Yasuyuki Tsuboi,&nbsp;Dr. Ken-ichi Yuyama","doi":"10.1002/cptc.202580501","DOIUrl":"https://doi.org/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}
引用次数: 0
Enhanced Performance of NiO-Based Dye-Sensitized Solar Cells Using a Covalent Porphyrin-C60 Dyad 用共价卟啉- c60复合物增强镍基染料敏化太阳能电池性能
IF 3 4区 化学
ChemPhotoChem Pub Date : 2025-05-12 DOI: 10.1002/cptc.202500075
Asterios Charisiadis, Vasilis Nikolaou, Aurélien Planchat, Yann Pellegrin, Georgios Charalambidis, Fabrice Odobel, Athanassios G. Coutsolelos
{"title":"Enhanced Performance of NiO-Based Dye-Sensitized Solar Cells Using a Covalent Porphyrin-C60 Dyad","authors":"Asterios Charisiadis,&nbsp;Vasilis Nikolaou,&nbsp;Aurélien Planchat,&nbsp;Yann Pellegrin,&nbsp;Georgios Charalambidis,&nbsp;Fabrice Odobel,&nbsp;Athanassios G. Coutsolelos","doi":"10.1002/cptc.202500075","DOIUrl":"https://doi.org/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}
引用次数: 0
Chiral Intelligence: The Artificial Intelligence-Driven Future of Chiroptical Properties 手性智能:手性的人工智能驱动的未来
IF 3 4区 化学
ChemPhotoChem Pub Date : 2025-05-01 DOI: 10.1002/cptc.202500079
Rafael G. Uceda, Alfonso Gijón, Sandra Míguez-Lago, Carlos M. Cruz, Luis Álvarez de Cienfuegos, Antonio J. Mota, Delia Miguel, Juan M. Cuerva
{"title":"Chiral Intelligence: The Artificial Intelligence-Driven Future of Chiroptical Properties","authors":"Rafael G. Uceda,&nbsp;Alfonso Gijón,&nbsp;Sandra Míguez-Lago,&nbsp;Carlos M. Cruz,&nbsp;Luis Álvarez de Cienfuegos,&nbsp;Antonio J. Mota,&nbsp;Delia Miguel,&nbsp;Juan M. Cuerva","doi":"10.1002/cptc.202500079","DOIUrl":"https://doi.org/10.1002/cptc.202500079","url":null,"abstract":"<p>Chirality plays a fundamental role in molecular sciences, with chiroptical properties offering valuable insights into the interaction between chiral molecules and polarized light. Designing chiral materials with enhanced properties requires a deep understanding of underlying physical principles, often revealed only through large datasets. In this context, artificial intelligence (AI) emerges as a powerful tool for accelerating discovery and optimization, efficiently exploring vast chemical spaces. This work explores the synergy between AI and chiroptical properties, highlighting recent advances in data-driven approaches for circular dichroism and circularly polarized luminescence. AI has demonstrated its ability to predict these phenomena accurately while uncovering structure–property relationships that can remain hidden under traditional methods. Various strategies are examined for integrating AI into chiroptical properties and the challenges and future directions of this field are discussed. In conclusion, combining chemical intuition with AI offers great potential for the rational design of next-generation chiral materials. This integration not only promises to unlock novel compounds with enhanced chiroptical properties but also provides new opportunities to deepen our understanding of chiroptical phenomena.</p>","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"9 7","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cptc.202500079","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144673010","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
Red-to-Near-Infrared Electroluminescence and Low-Threshold Amplified Spontaneous Emission from Solution-Processable Fluorescent Diketopyrrolopyrrole Derivatives 溶液处理荧光双酮吡咯衍生物的红-近红外电致发光和低阈值放大自发发光
IF 3 4区 化学
ChemPhotoChem Pub Date : 2025-05-01 DOI: 10.1002/cptc.202500039
Anthony D’ Aléo, Virginie Placide, Hao Ye, Matteo Fornasarig, Danillo Valverde, Eunyoung Choi, Gabriel Canard, Jeong Weon Wu, Yoann Olivier, Chihaya Adachi, Jean-Charles Ribierre
{"title":"Red-to-Near-Infrared Electroluminescence and Low-Threshold Amplified Spontaneous Emission from Solution-Processable Fluorescent Diketopyrrolopyrrole Derivatives","authors":"Anthony D’ Aléo,&nbsp;Virginie Placide,&nbsp;Hao Ye,&nbsp;Matteo Fornasarig,&nbsp;Danillo Valverde,&nbsp;Eunyoung Choi,&nbsp;Gabriel Canard,&nbsp;Jeong Weon Wu,&nbsp;Yoann Olivier,&nbsp;Chihaya Adachi,&nbsp;Jean-Charles Ribierre","doi":"10.1002/cptc.202500039","DOIUrl":"https://doi.org/10.1002/cptc.202500039","url":null,"abstract":"<p>A detailed investigation of the photophysical, electroluminescence, and amplified spontaneous emission (ASE) properties of two solution-processable fluorescent diketopyrrolopyrrole derivatives is reported. Photophysical measurements are carried out in solution and blend films containing a 4,4′-bis(<i>N</i>-carbazolyl)-1,10-biphenyl (CBP) or a poly[(9,9-di-<i>n</i>-octylfluorenyl-2,7-diyl)-alt-(benzo[2,1,3]thiadiazol-4,8-diyl)] host, to gain important insights into the excited state behavior of these dyes. Quantum chemical calculations are also carried out to support the experimental findings. An optimization of the doping concentration in the CBP blends is necessary to reduce the strong aggregation. This optimization led for both near-infrared-emitting dyes to a substantial increase of the photoluminescence quantum yield, which can reach values as high as 60%. It is also found that the blend films show excellent ASE properties with a threshold as low as 3.5–4.5 μJ cm<sup>−2</sup> for peak wavelengths of 739 and 727 nm. In addition, the electroluminescence properties of the two organic laser dyes are examined in organic light-emitting diodes (OLEDs). The best OLED device shows a maximum external quantum efficiency value of around 2%. Overall, this study demonstrates the excellent potential of diketopyrrolopyrrole derivatives for high-performance near-infrared organic semiconductor lasers and provides useful information for the design of new efficient near-infrared emitters for optoelectronic applications.</p>","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"9 7","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cptc.202500039","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144673011","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
Recent Advances in Luminescence of Platinum Complexes in the Near Infrared Second Window 铂配合物近红外第二窗口发光研究进展
IF 3 4区 化学
ChemPhotoChem Pub Date : 2025-05-01 DOI: 10.1002/cptc.202500041
Shingo Hattori, Kazuteru Shinozaki
{"title":"Recent Advances in Luminescence of Platinum Complexes in the Near Infrared Second Window","authors":"Shingo Hattori,&nbsp;Kazuteru Shinozaki","doi":"10.1002/cptc.202500041","DOIUrl":"https://doi.org/10.1002/cptc.202500041","url":null,"abstract":"<p>The near infrared (NIR) optical window enables to observe biological tissue noninvasively through photoimaging using luminophores. Particularly, the light in the NIR II region of 1000–1400 nm between strong absorption bands of H<sub>2</sub>O and tissue chromophores is advantageous for photoimaging and phototherapies of deep tissue. Pt complexes possessing the high emission ability and the luminescence tunability are expected to be luminophores for deep imaging and photosensitizers of photodynamic therapy. Herein, the NIR II emission from Pt complexes designed by the strategy of the extension of ligand π conjugation and the aggregation by the Pt–Pt interaction from recent works is reviewed.</p>","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"9 6","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144273167","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
Luminescent Dinuclear Chromium(III) Complexes with Ferromagnetic Exchange Interactions 具有铁磁交换作用的发光双核铬配合物
IF 3 4区 化学
ChemPhotoChem Pub Date : 2025-04-27 DOI: 10.1002/cptc.202500094
Dennis Fritzler, Cui Wang
{"title":"Luminescent Dinuclear Chromium(III) Complexes with Ferromagnetic Exchange Interactions","authors":"Dennis Fritzler,&nbsp;Cui Wang","doi":"10.1002/cptc.202500094","DOIUrl":"https://doi.org/10.1002/cptc.202500094","url":null,"abstract":"<p>Recent advances with luminescent mononuclear chromium(III) complexes have provided important molecular design guidelines for enhancing their photoluminescence properties. Applying these modern aspects of coordination chemistry to dinuclear Cr<sup>III</sup> complexes, which are mostly not luminescent but show interesting magnetic properties, seems attractive for exploring functional coordination compounds with magnetic exchange interactions and light-induced activity. In this concept, the key structural requirements for dinuclear Cr<sup>III</sup> complexes with ferromagnetic exchange interactions and with photoluminescence properties, respectively, are analyzed. Rational merger of these key magneto-optical–structural correlations leads to new types of dinuclear Cr<sup>III</sup> complexes with ferromagnetic coupling and room temperature luminescence, and their photophysical properties make them promising photosensitizers for energy transfer. These design concepts open the door of exploring novel dinuclear Cr<sup>III</sup> complexes, which can allow the crosstalk of photophysics, photochemistry, and magnetic exchange interactions.</p>","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"9 7","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cptc.202500094","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144671960","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
Excitation-Dependent Luminescent Properties with Wide Range of Color Changes Using a Liquescent Cationic Gold(I) Complex 利用液态阳离子金(I)配合物研究具有大范围颜色变化的激发依赖性发光特性
IF 3 4区 化学
ChemPhotoChem Pub Date : 2025-04-24 DOI: 10.1002/cptc.202500035
Shuichi Suzuki, Daiki Hishikawa, Naoki Ando, Soichiro Kawamorita, Takeshi Naota
{"title":"Excitation-Dependent Luminescent Properties with Wide Range of Color Changes Using a Liquescent Cationic Gold(I) Complex","authors":"Shuichi Suzuki,&nbsp;Daiki Hishikawa,&nbsp;Naoki Ando,&nbsp;Soichiro Kawamorita,&nbsp;Takeshi Naota","doi":"10.1002/cptc.202500035","DOIUrl":"https://doi.org/10.1002/cptc.202500035","url":null,"abstract":"<p>The solid form of a bis(trifluoromethanesulfonyl)imide ion salt of a cationic gold(I) complex ligated with cyclohexylisocyanide and an <i>N</i>-heterocyclic carbene is found to exhibit excitation-dependent luminescent properties. The solid form, prepared by maintaining the liquid phase of the complex at 90 °C for 7 days followed by cooling to 25 °C, displays bluish-purple, purple, orange, and red emissions under excitations at 340, 360, 370, and 380 nm, respectively. Excitation-dependent emission spectra reveal that the observed color changes result from varying intensity ratios of two emission bands centered at 430 and 652 nm. Control experiments suggest that these excitation-dependent luminescent properties originate from the coexistence of gold(I)–π aggregates and gold(I)–gold(I)-interacted oligomers, which exhibit higher and lower bandgap energies, respectively.</p>","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"9 7","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144673098","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
Structure-Dependent Fluorescent Behavior of Heterotetraarylene-Quinolones: The Critical Role of Chemical Bond Linkages 异四芳烯-喹诺酮类化合物的结构依赖荧光行为:化学键键的关键作用
IF 3 4区 化学
ChemPhotoChem Pub Date : 2025-04-24 DOI: 10.1002/cptc.202500078
Siyuan Chen, Yan Zeng, Xuewen Wang, Qingyu Dou, Qianfu Luo
{"title":"Structure-Dependent Fluorescent Behavior of Heterotetraarylene-Quinolones: The Critical Role of Chemical Bond Linkages","authors":"Siyuan Chen,&nbsp;Yan Zeng,&nbsp;Xuewen Wang,&nbsp;Qingyu Dou,&nbsp;Qianfu Luo","doi":"10.1002/cptc.202500078","DOIUrl":"https://doi.org/10.1002/cptc.202500078","url":null,"abstract":"<p>Altering the manner in which groups are connected could offer a straightforward approach to achieving different functionality. Herein, heterotetraarylene molecules with varying bond-linked quinoline moieties are synthesized and designed to investigate their differential performances. The heterotetraarylene with carbon-carbon double bonded quinolines exhibits multifunctional properties: 1) all-visible light-induced photochromism, 2) acidochromism, and 3) acid–base gated photoswitch. Simultaneously, it achieves dual-mode fluorescence modulation through both photoexcitation and acid/base stimuli. However, the heterotetraarylene and quinoline connected by carbon carbon single bonds exhibit divergent properties, including light-induced emission enhancement and solvent-dependent fluorescence emission. This bond-selective functional divergence enables precise customization of stimulus-responsive fluorescence through simple connectivity control, establishing a novel design paradigm for smart molecular systems. Furthermore, the heterotetraarylene-linked quinolines with carbon carbon double bonds exhibit many properties, thus allowing for the construction of a new dual-responsive encryption system.</p>","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"9 7","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144673099","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
Photophysical Properties of Substituted Zinc Phthalocyanine-Dextran Systems 取代酞菁锌-右旋糖酐体系的光物理性质
IF 3 4区 化学
ChemPhotoChem Pub Date : 2025-04-17 DOI: 10.1002/cptc.202400385
Tamara Potlog, Ion Lungu, Anton Airinei, Radu Tigoianu
{"title":"Photophysical Properties of Substituted Zinc Phthalocyanine-Dextran Systems","authors":"Tamara Potlog,&nbsp;Ion Lungu,&nbsp;Anton Airinei,&nbsp;Radu Tigoianu","doi":"10.1002/cptc.202400385","DOIUrl":"https://doi.org/10.1002/cptc.202400385","url":null,"abstract":"<p>This study presents the synthesis of tetracarboxy ZnPc/dextran and octacarboxy ZnPc/dextran solutions and the investigation of their photophysical properties using UV–vis, transient absorption (TA), and emission spectroscopy. Nanosecond TA measurements are conducted using pump–probe techniques. ZnPc(COOH)<sub>4</sub> derivative exhibits efficient fluorescence, room-temperature phosphorescence in dimethyl sulfoxide/H<sub>2</sub>O solution, with a quantum efficiency of 14.8% and lifetimes of 1.18 and 8.89 μs. The addition of dextran to ZnPc(COOH)<sub>8</sub> broadens the splitting of the two subbands in the Q band, leading to a characteristically strong far-redshift in the UV–vis absorption spectrum compared to the ZnPc(COOH)<sub>4</sub>/dextran (DX) system. The triplet-state properties of ZnPc(COOH)<sub>4</sub>/DX and ZnPc(COOH)<sub>8</sub>/DX systems with an absorption region within the phototherapeutic window, the average lifetimes values of 4.86 and 5.17 μs, respectively, reveal them attractive as photosensitizing materials in photodynamic therapy. TA spectra of ZnPc(COOH)<sub>4</sub>/DX and ZnPc(COOH)<sub>8</sub>/DX conjugates measured at a pump pulse of 355 nm show positive and negative signals, indicating triplet–triplet (T–T) absorption and triplet–singlet (T–S) emission.</p>","PeriodicalId":10108,"journal":{"name":"ChemPhotoChem","volume":"9 7","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cptc.202400385","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144672022","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
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