Results 121 to 130 of about 19,091 (291)

Double Thionation of 4‐Dimethylaminophthalimide Leads to the Development of a Highly Effective Photosensitizer

Chemistry – A European Journal, EarlyView.
We report on the photophysical properties and electronic relaxation mechanisms of 4‐dimethylaminophthalimide (DMAP) and thio‐4‐dimethylaminophthalimide (SDMAP). While DMAP is fluorescent, SDMAP shows negligible fluorescence due to ultrafast intersystem crossing to a long‐lived triplet state that decays in 3.4 ± 0.05 µs.
Chris Acquah, Eric Lee, Sourav Kanti Seth, Reshma Mathew, Rubej R. Khan, Steffen Jockusch, Shudan Yang, Han Xiao, Carlos E. Crespo‐Hernández   +8 more
wiley   +1 more source

Solvent Effects in Room Temperature Phosphorescence

, 1988
Room temperature phosphorescence (R TP) analysis is a technique in which solutions containing organic phosphors are applied to filter paper and dried in the absence of oxygen.
Haustein, Catherine, Helsenbeck, Shane J.   +1 more
core  

N‐Aryl Acridone Derivatives as Effective Catalysts for Energy Transfer Reactions

Chemistry – A European Journal, EarlyView.
Acridones derivatives have high triplet energy, are simple accessible, and could be used in challenging [2+2] ENT reactions. ABSTRACT Organic photocatalysts capable of promoting high‐energy triplet energy transfer (EnT) remain limited, particularly for demanding [2+2] photocycloaddition reactions.
Francesco Calogero, Gaetano D'Onghia, Federica Fina, Zakaria Ziani, Luca Sensoli, Andrea Gualandi, Andrea Fermi, Paola Ceroni, Pier Giorgio Cozzi   +8 more
wiley   +1 more source

3D-Printable Room Temperature Phosphorescence Polymer Materials with On-Demand Modulation for Modulus Visualization and Anticounterfeiting Applications

Chem & Bio Engineering
Conventional room temperature phosphorescence (RTP) polymer materials lack a dynamic structural change mechanism for on-demand phosphorescence emission, limiting their application in specific scenarios, such as smart devices.
Zhen Li, Chuanzhen Zhang, Wenhuan Huang, Chenhui Cui, Kexiang Chen, Zhiyuan He, Ting Xu, Haoqing Teng, Zhishen Ge, Xiaoqing Ming, Yanfeng Zhang   +10 more
doaj   +1 more source

Asymmetric Diphosphane Dioxides With A–π–A–π’–D Scaffolds for High‐Purity Deep‐Blue Luminescence

Chemistry – A European Journal, EarlyView.
Diphosphane dioxide‐based luminophores with donor–π–acceptor– π’–acceptor scaffold enable efficient deep‐blue emission from tunable charge‐transfer states affording high photoluminescence up to 95%. OLEDs reach EQE 4.9%, aided by triplet–triplet annihilation, highlighting a practical route to high‐performance blue emitters.
Eetu Hakkarainen, Zong‐Ying Liu, Jhon Sebastian Oviedo Ortiz, Nicolas Vanthuyne, Jeanne Crassous, Ondřej Mrózek, Fabien B. L. Cougnon, Wen‐Yi Hung, Pi‐Tai Chou, Igor O. Koshevoy, Andrey Belyaev   +10 more
wiley   +1 more source

Matrix‐Free Afterglow Carbon Dots: Synthetic Strategies, Luminescence Mechanisms, and Emerging Applications

Carbon Innovation, EarlyView.
This review systematically elucidates the luminescence mechanism, synthesis methods of matrix‐free afterglow carbon dots, and their application progress in information encryption, light‐emitting diodes, sensing, bioimaging, and tumor treatment, and finally, discusses the current challenges and future development directions. ABSTRACT Afterglow materials,
Yupeng Liu, Xiangxin Sun, Zhiqi Cai, Hanyi Zhang, Yiming Hao, Songnan Qu   +5 more
wiley   +1 more source

Twofold rigidity activates ultralong organic high-temperature phosphorescence

Nature Communications
A strategy is pioneered for achieving high-temperature phosphorescence using planar rigid molecules as guests and rigid polymers as host matrix. The planar rigid configuration can resist the thermal vibration of the guest at high temperatures, and the ...
Kaijun Chen, Yongfeng Zhang, Yunxiang Lei, Wenbo Dai, Miaochang Liu, Zhengxu Cai, Huayue Wu, Xiaobo Huang, Xiang Ma   +8 more
doaj   +1 more source

Gas–Solid Interface‐Assisted Growth of Organic Semiconductor Single Crystals: Dimensions, Structures, Mechanisms, and Applications

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Gas–solid interface‐assisted growth strategies have unlocked precise control over crystal structure, morphology, dimension, and molecular packing. The obtained organic semiconductor single crystals represent the ideal candidates for high‐performance organic optoelectronic devices.
Tingyi Yan, Qing Tian, Jinwen Wang, Ke Jiang, Yage Han, Yuanzhuang Ren, Lingyun Li, Xiujuan Zhang, Jiansheng Jie   +8 more
wiley   +1 more source

Photostimulated long-lasting phosphorescence in rare-earth-doped glasses

, 2003
Tb3+-doped glass sample emits bright and long-lasting phosphorescence after irradiation by an 800-nm femtosecond pulsed laser. Long-lasting phosphorescence is observed once again after further excitation by 365-nm UV light when the femtosecond laser ...
Chengyu Li, Zhu, CS, Jinhai Si, Li, CY, Hirao, K, Kazuyuki Hirao, Qiang Su, Qiu, JR, Jianrong Qiu, Si, JH, Xiongwei Jiang, Jiang, XW, Su, Q, Congshan Zhu   +13 more
core   +1 more source

Activation of Aryl Halides by Triplet–Triplet Annihilation Upconversion Enabling Coupling Processes Under an Open‐to‐Air Environment

European Journal of Organic Chemistry, EarlyView.
Triplet–triplet annihilation upconversion (TTA‐UC) performed inside supramolecular viscoelastic gels enables efficient CC and C–heteroatom coupling reactions under green LED irradiation in open‐air conditions. The gel network restricts oxygen diffusion, preserves triplet states, and allows aryl halide activation through upconverted excited states ...
Daniel Álvarez‐Gutiérrez, Paola Domínguez Domínguez, M. Consuelo Jiménez, David Díaz Díaz, Raúl Pérez‐Ruiz   +4 more
wiley   +1 more source