Results 31 to 40 of about 28,761 (191)

High efficient room temperature phosphorescent materials constructed with methylene molecular configuration

Frontiers in Chemistry, 2022
In this work, we have investigated several pure organic room temperature phosphorescent materials with donor-methylene acceptor configurations with relatively different quantum efficiency.
Jian Wang
doaj   +1 more source

Effect of temperature on rate of the spin-forbidden transition in uracil and thymine [PDF]

Journal of the Serbian Chemical Society, 2013
The intersystem crossing rates of uracil and thymine molecules in interaction with the heat bath were studied by means of the ab initio methods. The rates were calculated employing the time-dependent approach based on the correlation function.
Etinski Mihajlo
doaj   +1 more source

Towards Prediction of Non-Radiative Decay Pathways in Organic Compounds I: The Case of Naphthalene Quantum Yields [PDF]

, 2019
Many emerging technologies depend on human’s ability to control and manipulate the excited-state properties of molecular systems. These technologies include fluorescent labeling in biomedical imaging, light harvesting in photovoltaics, and ...
Kohn, Alexander, Lin, Zhou, Van Voorhis, Troy   +2 more
core   +3 more sources

Mechanism of the Zn(II)Phthalocyanines’ Photochemical Reactions Depending on the Number of Substituents and Geometry

Molecules, 2016
In this work, the synthesis and the nonlinear absorption and population dynamics investigation of a series of zinc phthalocyanines (ZnPcs) dissolved in chloroform are reported.
Leandro Henrique Zucolotto Cocca, Mehmet Menaf Ayhan, Ayşe Gül Gürek, Vefa Ahsen, Yann Bretonnière, Jonathas de Paula Siqueira, Fernando Gotardo, Cleber Renato Mendonça, Catherine Hirel, Leonardo De Boni   +9 more
doaj   +1 more source

Ultralong phosphorescence cellulose with excellent anti-bacterial, water-resistant and ease-to-process performance

Nature Communications, 2022
Organic room-temperature phosphorescence (RTP) materials often suffer from poor processability because of their crystalline or cross-linked nature.
Xin Zhang, Yaohui Cheng, Jingxuan You, Jinming Zhang, Chunchun Yin, Jun Zhang   +5 more
doaj   +1 more source

Singlet Fission, Polaron Generation and Intersystem Crossing in Hexaphenyl Film

Molecules, 2022
The ultrafast dynamics of triplet excitons and polarons in hexaphenyl film was investigated by time-resolved fluorescence and femtosecond transient absorption techniques under various excitation photon energies. Two distinct pathways of triplet formation
Wenjun Ni, Tianjiao Li, Christian Kloc, Licheng Sun, Gagik G. Gurzadyan   +4 more
doaj   +1 more source

Intersystem crossing in the exit channel

Nature Chemistry, 2018
Intersystem crossing plays an important role in photochemistry. It is understood to be efficient when heavy atoms are present due to strong spin-orbit coupling, or when strongly bound long-lived complexes are formed that increase the chance of finding the singlet-triplet intersection seam.
Hongwei Li, Alexander Kamasah, Spiridoula Matsika, Arthur G. Suits   +3 more
openaire   +3 more sources

Internal Conversion vs. Intersystem Crossing – What Drives the Dynamics of Cyclic α,β-Enones?

EPJ Web of Conferences, 2013
The origin of ultrafast intersystem crossing and its competitiveness with singlet pathways was studied in cyclic α,β-enones by transient absorption, time-resolved photoelectron spectroscopy and ab initio calculations.
Riedle E., Bradler M., Wu G., Schuurman M. S., Lang P., Schalk O., Stolow A.   +6 more
doaj   +1 more source

Unveiling the photophysics of thiourea from CASPT2/CASSCF potential energy surfaces and singlet/triplet excited state molecular dynamics simulations

, 2019
This work describes the decay mechanism of photoexcited thiourea, both in gas phase and in solution, from the information inferred from the topography of the excited and ground state potential energy surfaces and mixed singlet/triplet quantum classical ...
Corral, Ines, Granucci, Giovanni, Munoz-Muriedas, Jordi, Porta, Neus Aguilera   +3 more
core   +1 more source

Confining donor conformation distributions for efficient thermally activated delayed fluorescence with fast spin-flipping

Nature Communications, 2023
Fast spin-flipping is the key to exploit the triplet excitons in thermally activated delayed fluorescence based organic light-emitting diodes toward high efficiency, low efficiency roll-off and long operating lifetime.
Weidong Qiu, Denghui Liu, Mengke Li, Xinyi Cai, Zijian Chen, Yanmei He, Baoyan Liang, Xiaomei Peng, Zhenyang Qiao, Jiting Chen, Wei Li, Junrong Pu, Wentao Xie, Zhiheng Wang, Deli Li, Yiyang Gan, Yihang Jiao, Qing Gu, Shi-Jian Su   +18 more
doaj   +1 more source