Results 41 to 50 of about 14,125 (198)

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

Pitfalls of quantifying intersystem crossing rates in singlet-fission chromophore solutions

, 2022
Singlet fission (SF), a process that produces two triplet excitons from one singlet exciton, has attracted recent interest for its potential to circumvent the detailed-balance efficiency limit of single-junction solar cells. For the potential of SF to be
Alexandra, Stuart, Patrick, Tapping, David, Huang, Tak, Kee   +3 more
core   +1 more source

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
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Unveiling the concentration dependent direct triplet formation via singlet fission in a tetracene derivative [PDF]

EPJ Web of Conferences, 2019
Singlet fission is slowed down on diffusional timescales in highly concentrated solutions compared to thin films for a tetracene-like molecule. The underlying mechanism suggests competing intersystem crossing and singlet fission, where in the latter ...
Wollscheid Nikolaus, Alagna Nicolo, Perez Lustres J. Luis, Buckup Tiago, Hahn Sebastian, Bunz Uwe H. F., Motzkus Marcus   +6 more
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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
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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
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Spin statistics for triplet-triplet annihilation upconversion: exchange coupling, intermolecular orientation and reverse intersystem crossing

, 2021
Triplet-triplet annihilation upconversion (TTA-UC) has great potential for significantly improving the light harvesting capabilities of photovoltaic cells, as well as being sought after for biomedical applications.
Nobuhiro , Yanai, David, Bossanyi, Yoichi, Sasaki, Nobuo, Kimizuka, Jenny, Clark, Dimitri, Chekulaev   +5 more
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Intersystem Crossing as Vibronically-Induced Phonon Emission and Absorption Processes: A Unified View of Nonradiative Transitions in a Molecule

, 2023
An analytical expression for the nonradiative rate constant is derived based on Fermi\u27s golden rule within the mixed-spin crude adiabatic (CA) approximation.
Tohru, Sato, Wataru, Ota, Motoyuki, Uejima, Naoki, Haruta   +3 more
core   +1 more source

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
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Ballistic ΔS=2 Intersystem Crossing in a Cobalt Cubane Following Ligand-Field Excitation Probed by Extreme Ultraviolet Spectroscopy

, 2021
Femtosecond M2,3-edge X-ray absorption near-edge structure (XANES) spectroscopy is used to probe the excited-state dynamics of the cobalt cubane [CoIII4O4](OAc)4(py)4 (OAc = acetate, py = pyridine), a model for water oxidation catalysts.
Josh, Vura-Weis, Yusef, Shari\u27ati
core   +1 more source