Journal of Photochemistry and Photobiology A-chemistry最新文献

{"title":"Boosting the photocatalytic performance for oxidative coupling of amines to imines by fabricating the Zn0.1Cd0.9S/In2O3 heterojunction","authors":"Chengxin Du,&nbsp;Ailin Luo,&nbsp;Shipeng Ye,&nbsp;Qing Wang,&nbsp;Yu Song,&nbsp;Yafen Zhou,&nbsp;Limei Zhou","doi":"10.1016/j.jphotochem.2025.116615","DOIUrl":"10.1016/j.jphotochem.2025.116615","url":null,"abstract":"<div><div>A series of Zn_0.1Cd_0.9S/In₂O₃ (ZCS/IO) direct <em>Z</em>-scheme heterojunction composites enriched with oxygen vacancies were prepared by a facile hydrothermal method. The obtained ZCS/IO composites exhibited a remarkable improved activity for the photocatalytic oxidation of benzylamine (BA) to N-benzylidene benzylamine (N-BDBA) under visible light illumination and ambient air as compared to pure Zn_0.1Cd_0.9S and In₂O₃. Especially, the ZCS/IO composite with a In₂O₃ mass ratio of 10 %, denoted as ZCS/IO-10, showed the best photocatalytic performance, offering 99.6 % conversion of benzylamine with high selectivity (&gt;99.0 %) to N-BDBA within 1 h of irradiation. The significant improvement in photocatalytic activity was attributed to the construction of a direct <em>Z</em>-scheme heterojunction between Zn_0.1Cd_0.9S and In₂O₃, and the great increase in oxygen vacancies (OVs) concentration. As a result, the light absorption ability of the ZCS/IO composite was enhanced and the separation and migration of the photogenerated electrons and holes were accelerated, meanwhile the high redox ability of the composite was maintained, and thus resulting in the boosting of it's photocatalytic activity for amine oxidation. In addition, the high activity of ZCS/IO-10 composite was maintained during the four consecutive cycles, suggesting its good stability and reusability. Besides, the substituted benzylamines and heterocyclic amines can also be transformed to their corresponding imines phtocatalyzed by the ZCS/IO-10 composite, manifesting the good versatility of the composite catalyst</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"470 ","pages":"Article 116615"},"PeriodicalIF":4.1,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144632973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Achieving enhanced, tunable and broadened NIR-II emission in Ni2+ doped Li₂Mg₃TiO₆ via cationic substitution strategy","authors":"Xijie Liang ,&nbsp;Yuting Chen ,&nbsp;Tianzheng Ouyang ,&nbsp;Fugen Wu ,&nbsp;Qi Zhang ,&nbsp;Yun Teng ,&nbsp;Xiaozhu Xie ,&nbsp;Huafeng Dong ,&nbsp;Zhongfei Mu","doi":"10.1016/j.jphotochem.2025.116605","DOIUrl":"10.1016/j.jphotochem.2025.116605","url":null,"abstract":"<div><div>Near-infrared (NIR) light has been extensively utilized in biometric identification, food safety inspection, and biomedical imaging. To meet the spectral requirements for NIR detection, phosphors used in the current emerging phosphor-converted light-emitting diodes (Pc-LEDs) must exhibit broadband emission and high photoluminescence quantum yield (PLQY). Enhancing the luminescence efficiency and broadening emission bandwidth of existing NIR emitting phosphors, particularly in NIR-II spectral region (1000–1700 nm), have become critical and urgent research tasks. Inspired by the tunable crystal structure of Li₂Mg₃TiO₆ (LMT), we designed a series of Ni²⁺ doped broadband NIR-II emitting phosphors, Li₂Mg₃Ti_1-<em>x</em>Sn_<em>x</em>O₆: 0.007Ni²⁺ (<em>x</em> = 0–1.0), through Sn⁴⁺ substitution for Ti⁴⁺ in the LMT host, aiming to precisely modulate the crystal field environment around Ni²⁺. Experimental results demonstrate that the dominant emission peak red-shifts from 1355 to 1474 nm, while the FWHM broadens from 284.97 to 382.53 nm (Δ_FWHM = 98 nm) with increasing Sn⁴⁺ concentration. Concurrently, the PLQY is significantly improved from 17.3 % to 30.2 %. The phosphors exhibit superior performance in bio-penetrating imaging and spectral detection through cation substitution strategy of NIR emission band broadening and quantum efficiency enhancement. These results present important guiding significance for the development of efficient broadband NIR-II emitting phosphors used in rapidly developing NIR Pc-LEDs.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"470 ","pages":"Article 116605"},"PeriodicalIF":4.1,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144614591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hetero-metal MOF derivatives anchored on porous carbonized wood as photo-Fenton catalysts for ultrafast organic pollutant removal","authors":"Kaiqian Li ,&nbsp;Xupeng Zhang ,&nbsp;Jing Wang ,&nbsp;Longxin Guo ,&nbsp;Shuduan Deng ,&nbsp;Tian Xie ,&nbsp;Jialei Wang ,&nbsp;Gang Zhu","doi":"10.1016/j.jphotochem.2025.116616","DOIUrl":"10.1016/j.jphotochem.2025.116616","url":null,"abstract":"<div><div>Hetero-metal organic framework (HMOF) derivatives have emerged as promising photo-Fenton catalysts for removing hazardous organic pollutants from wastewater. However, most proposed catalysts suffer from low photocatalytic activity due to self-aggregation, structural instability, and limited active sites, which hinder their industrial feasibility. Herein, we report a highly efficient Cu–Fe/WPC catalyst (WPC denotes wood-converted porous carbon) featuring HMOF-derived Cu-Fe bimetallic nanoparticles embedded in the WPC skeleton. Under optimal conditions, the Cu-Fe/WPC/H₂O₂/UV system exhibits exceptional degradation performance for methylene blue (MB) and sulfamethoxazole (SMX), with rapid pseudo-first-order rate constants of 1.397 and 1.489 min⁻¹, respectively. Notably, this hybrid photocatalyst achieves complete degradation of MB and SMX within 5 min. The synergistic catalysis between Fe and Cu dual active sites plays a crucial role in enhancing photo-Fenton activity. This synergy boosts the electron-transfer capacity during the valence-state evolution of copper and accelerates the Fe (III)/Fe (II) redox cycle in the Fenton reaction. Additionally, the conversion of Fe species in the Cu-Fe/WPC/H₂O₂ system dominates H₂O₂ activation, generating abundant hydroxyl radicals (·OH) that subsequently participate in the degradation of organic pollutants. This study presents innovative strategies for synthesizing wood-based porous carbon-supported HMOF derivative catalysts designed for ultra-fast photo-Fenton degradation of emerging organic pollutants.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"470 ","pages":"Article 116616"},"PeriodicalIF":4.1,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144633104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis and luminescent properties of novel cyan-green-emitting phosphors Na3YSi2O7: Eu2+ for full-spectrum lighting","authors":"Y.Q. Lin ,&nbsp;F.B. Xiong ,&nbsp;H.L. Li ,&nbsp;Y.P. Wang ,&nbsp;H.M. Zhu ,&nbsp;Q.Q. Zhuang ,&nbsp;Z.J. Cheng","doi":"10.1016/j.jphotochem.2025.116614","DOIUrl":"10.1016/j.jphotochem.2025.116614","url":null,"abstract":"<div><div>The discovery of novel high-efficiency cyan-green-emitting phosphors is great meaningful for the achievement of full-spectrum white LED, but still a challenge due to the strict crystal field limitation. Herein, we present a novel cyan-green-emitting phosphor Na₃YSi₂O₇:Eu²⁺ synthesized by high-temperature solid-state reaction. The crystal structure, photoluminescence (PL) properties, PL spectra at low temperature, decay lifetime and thermal stability of these phosphors are investigated on detailed. The Eu²⁺ ions occupy the Na(2)⁺ crystallographic sites and Y³⁺ sites. The emission spectra of those phosphors consist of a cyan-green emission bands around 475-650 nm with a full width at half maximum (FWHM) of 71 nm upon the excitation at 365 nm. Two different Eu²⁺ cyan-green-emitting centers are identified by the PL spectra. The interesting red emission of Eu²⁺ ions in Na₃YSi₂O₇: Eu²⁺ phosphor at 665 nm is observed at 8 K and disappeared at room temperature. The concentration quenching mechanism of Eu²⁺ in Na₃YSi₂O₇ is determined. The fluorescence lifetimes of the as-prepared Na₃YSi₂O₇: <em>x</em>Eu²⁺ (<em>x =</em> 0.005–0.025) samples are several hundred nanoseconds and the temperature-dependent luminescence indicated Na₃YSi₂O₇: Eu²⁺ is poor thermal-stable. High-quality neutral-white light (CRI = 89, CCT = 4049 K) were emitted from the LED fabricated by this cyan-green Na₃YSi₂O₇: Eu², commercial red phosphors and 365 nm violet chips. Our results indicate that novel cyan-green-emitting Na₃YSi₂O₇: Eu²⁺ phosphors are expected to have potential application in the field of full-spectrum white LED.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"470 ","pages":"Article 116614"},"PeriodicalIF":4.1,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144632752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrigendum to “Fluorescent tetrazolylpyrene unnatural nucleoside in sensing BSA protein” [J. Photochem. Photobiol. A: Chem. 463 (2025) 116290]","authors":"Subhendu Sekhar Bag ,&nbsp;Hiranya Gogoi ,&nbsp;Sujata Roy ,&nbsp;Manoj Kumar Pradhan ,&nbsp;Sangita Talukdar","doi":"10.1016/j.jphotochem.2025.116599","DOIUrl":"10.1016/j.jphotochem.2025.116599","url":null,"abstract":"","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"469 ","pages":"Article 116599"},"PeriodicalIF":4.1,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144633393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Three-dimensional CNTs/TiO2 self-supporting hybrid fabrics constructed via atomic layer deposition for visible-light-enhanced catalytic activity","authors":"Jianhua Feng,&nbsp;Tianlin Ma,&nbsp;Jing Yang,&nbsp;Gangling Chen","doi":"10.1016/j.jphotochem.2025.116617","DOIUrl":"10.1016/j.jphotochem.2025.116617","url":null,"abstract":"<div><div>The contamination caused by synthetic dyes represents a global challenge that requires immediate and effective solutions. Photocatalysis provides an effective solution to this challenge, and carbon nanotubes (CNTs) represent a promising material for the development of advanced composite photocatalysts. However, the pronounced hydrophobic characteristics significantly hinder its applicability in water-based environments. In this research, the freestanding CNT substrates were modified <em>via</em> the deposition of titanium dioxide (TiO₂) using atomic layer deposition (ALD). The loadings of oxide in CNT fabrics were examined by controlling ALD deposition and subsequent calcination conditions. The morphological characteristics, crystalline structure, wettability, and photocatalytic performance of the deposited CNT fabrics were also systematically investigated in detail. The hydrophilicity of CNT fabrics is promoted <em>via</em> ALD of TiO₂ on one hand, and the functionalized fabrics exhibit excellent photocatalytic degradation performance on the other. Compared with pristine CNT fabric, the TiO₂-CNT composite fabric exhibits excellent photocatalytic degradation performance and stable reusability. After calcination, the integration of CNTs with anatase TiO₂ significantly enhances electron transfer efficiency and markedly reduces the recombination probability occurring between photogenerated electrons and holes.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"470 ","pages":"Article 116617"},"PeriodicalIF":4.1,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144614661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structure, IR spectrum and UV-induced photochemistry of a pyridyl-substituted 1,3,4-oxadiazole-thione in Ar matrix and intermolecular interactions in the neat crystalline phase","authors":"İsa Sıdır ,&nbsp;Susy Lopes ,&nbsp;José António Paixão ,&nbsp;Timur Nikitin ,&nbsp;António Jorge Lopes Jesus ,&nbsp;Rui Fausto","doi":"10.1016/j.jphotochem.2025.116610","DOIUrl":"10.1016/j.jphotochem.2025.116610","url":null,"abstract":"<div><div>The structure, infrared (IR) spectrum and UV-induced (<em>λ &gt;</em> 235 nm) photochemistry of 5-(4-pyridyl)-1,3,4-oxadiazole-2(3<em>H</em>)-thione (abbreviated as <strong>POT</strong>) isolated in a low-temperature argon matrix, at 15 K, were thoroughly investigated. Interpretation of the experimental spectrum was assisted by theoretical calculations undertaken at the DFT(B3LYP)/6–311++G(d,p) level of theory. In the gas phase (and in the cryogenic matrix) the molecule of the compound was found to adopt the thione-amine tautomeric form, where NH is vicinal to C<img>S, i.e., the same tautomeric form previously observed in the neat crystalline form of the compound. Upon sublimation and subsequent deposition into the argon matrix, the compound underwent minor, yet detectable, conversion into other species. These photoproducts were identical to those formed upon in situ broadband UV irradiation (λ &gt; 235 nm) of the matrix-isolated compound. Two different reaction pathways were identified: the first (minor) being the C<img>O open-ring reaction leading to the formation of an isocyanate derivative, and the second (major) corresponding to the OCS extrusion generating allenic and propargylic type bond-shift isomeric nitrilimines. The carbodiimide and cyanamide resulting from subsequent rearrangement of the nitrilimines were also observed both in the as-deposited matrix (as a result of the thermally-induced chemistry taking place during sublimation of the compound) and after in situ UV-irradiation of the matrix. The nitrilimines were only captured during the photolysis experiments and were not observed in the spectra of the initially deposited matrix, because they quickly converted to the more stable carbodiimide and cyanamide isomeric forms during matrix deposition. Coupled-cluster calculations with single and double excitations [CCSD/6–311++G(d,p)] were also performed to further characterize the nitrilimines, revealing that the allenic form is slightly more stable than the propargylic one, in agreement with the spectroscopic data. The IR and Raman spectra of the neat crystalline compound were also analyzed in the temperature range of −140 to 220 °C, and the dominant intermolecular interactions in the crystal were elucidated using CrystalExplorer-based analysis of Hirshfeld surfaces and interaction energies. Overall, this study contributes to understanding of the structure, spectroscopy and chemical reactivity of oxadiazoles.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"470 ","pages":"Article 116610"},"PeriodicalIF":4.1,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144614590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tunable Cr3+-Cr3+ ion pair luminescence properties of MgGa2O4:Cr3+ NIR phosphors via alkaline-earth metal co-doping","authors":"Liying Ren ,&nbsp;Dandan Wang ,&nbsp;Daming Yang ,&nbsp;Guiru Sun ,&nbsp;Hang Xu ,&nbsp;Jinnan Xuan ,&nbsp;Boxu Jiang ,&nbsp;Bin Huang ,&nbsp;Tairui Li ,&nbsp;Ming Feng ,&nbsp;Liangliang Zhang","doi":"10.1016/j.jphotochem.2025.116612","DOIUrl":"10.1016/j.jphotochem.2025.116612","url":null,"abstract":"<div><div>The Cr³⁺-Cr³⁺ ion pair has emerged as a highly efficient near-infrared (NIR) luminescence center with improved thermal stability and broader short-wave-infrared (SWIR) bandwidth compared to isolated Cr³⁺ ions. However, its formation typically requires high Cr³⁺ concentrations, which may induce concentration quenching. Herein, we propose an atomic substitution strategy to regulate Cr³⁺-Cr³⁺ pair formation without relying on excessive Cr³⁺ doping. Using MgGa₂O₄: Cr³⁺ as a model system, density functional theory (DFT) calculations combined with experimental analysis reveal that substituting tetrahedral Mg sites with alkaline earth metals influences Cr³⁺-Cr³⁺ ion pair formation. A larger ionic radius at the Mg site facilitates easier formation of Cr³⁺-Cr³⁺ ion pairs. By introducing Be, Ca, Sr, or Ba, we successfully controlled the population of Cr³⁺-Cr³⁺ pair centers, tuning SWIR emission intensity between 800 and 1200 nm. This work deepens understanding of Cr³⁺-Cr³⁺ ion center formation and offers a new route to tailor SWIR luminescence.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"470 ","pages":"Article 116612"},"PeriodicalIF":4.1,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"BODIPY conjugates with monoterpenoids for photodynamic diagnostics and therapy: Design, spectral properties, photostability and antifungal activity","authors":"Galina B. Guseva ,&nbsp;Yulya V. Eremeeva ,&nbsp;Ekaterina Yu. Belyakova ,&nbsp;Svetlana A. Lisovskaya ,&nbsp;Ilmir R. Gilfanov ,&nbsp;Liliya E. Nikitina ,&nbsp;Elena V. Antina","doi":"10.1016/j.jphotochem.2025.116611","DOIUrl":"10.1016/j.jphotochem.2025.116611","url":null,"abstract":"<div><div>The development of BODIPY-based theranostic agents for photodynamic inactivation (PDI) of pathogens is one of the rapidly developing areas. In this work, we present the results of the synthesis of the diiodo-BODIPY with methanol, (+)-myrtenol and thiotherpenoid conjugates. We performed a comparative analysis of the influence of the ester residue nature, iodination, and solvent properties on the spectral, generation characteristics and photostability of the alkyl- and diiodo-BODIPY conjugates, and their efficiency to penetrate and inhibit <em>Candida albicans</em> cells under light. Non-halogenated conjugates of BODIPY with methanol, (+)-myrtenol and thiotherpenoid show potential for fluorescence diagnostics due to their high fluorescence, photostability, and membranotropicity. Diiodo-substituted terpene-BODIPY conjugates have higher singlet oxygen generation efficiency and greater affinity for lipid biostructures compared to non-halogenated analogues. Furthermore, halogenation and conjugation of BODIPY to a monoterpenoid modify the preferred biotarget and contribute to the effective inhibition of <em>Candida albicans</em> viability. These results suggest that diiodo-substituted terpene-BODIPY conjugates may be promising antifungal agents for blocking fungal virulence.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"470 ","pages":"Article 116611"},"PeriodicalIF":4.1,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Alicycloimide substitution strategy for realizing solution-Processable small molecules material with thermally activated delayed fluorescence","authors":"Yubo Long ,&nbsp;Zhaokun Lu ,&nbsp;Yunfei Cao ,&nbsp;Jiantao Ru ,&nbsp;Haiyi Li ,&nbsp;Shengming Li","doi":"10.1016/j.jphotochem.2025.116608","DOIUrl":"10.1016/j.jphotochem.2025.116608","url":null,"abstract":"<div><div>Highly efficient solution-processable emitters, especially small molecules, are greatly desired to develop low-cost and low-energy-consumption organic light-emitting diodes (s-OLEDs). A recently developed class of potentially metal-free emitters, thermally activated delayed fluorescence (TADF) materials, are promising candidates, but solution-processable TADF materials are not well investigated. In this study, TADF molecules with or without HHPI unit were synthesized, named PTC-HDA and PTCP, respectively. All of them show TADF properties. The introduction of HHPI significantly enhanced thermo-stability and luminescence property with high photoluminescence quantum yield (<em>Φ</em>_PLQY) from 18.7 % to 48.3 %. Glass transition temperature (<em>T</em>_g) and decomposition temperature (<em>T</em>5% d) increased from 135 °C and 477 °C to 177 °C and 586 °C. PTCP show obvious double emission at 452 nm and 561 nm, while the emission at 452 nm is disappeared for PTC-HDA. HHPI unit enhance the film-forming properties of PTC-HDA with roughness of 0.302 compared with roughness of 0.524 for PTCP, even after one week stay the same as before. In the application to OLEDs preparing through spin-coating process, the high external quantum efficiency (<em>η</em>max EQE) of 11.90 % and low efficiency roll-off (1.7 % at 100 lm cm⁻² and 18.8 % at 1000 lm cm⁻²) for PTC-HDA were achieved. Which is significantly improved due to HHPI unit compared with PTCP (<em>η</em>max EQE = 7.85 %, efficiency off 7.2 % at 100 lm cm⁻² and 23.3 % at 1000 lm cm⁻²). This work demonstrates the validity of HHPI substitution and paves a pathway for straightforward realization of solution-processable efficient TADF emitters.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"470 ","pages":"Article 116608"},"PeriodicalIF":4.1,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}