Results 11 to 20 of about 28,761 (191)

Development of an Organic Emitter Exhibiting Reverse Intersystem Crossing Faster than Intersystem Crossing

Angewandte Chemie International Edition
AbstractIn thermally activated delayed fluorescence (TADF)‐based organic light‐emitting diodes (OLEDs), acceleration of reverse intersystem crossing (RISC) and suppression of intersystem crossing (ISC) are demanded to shorten a lifetime of triplet excitons. As a system realizing RISC faster than ISC, inverted singlet‐triplet excited states (iST) with a
Ryosuke Okumura, Hiroyuki Tanaka, Katsuyuki Shizu, Shohei Fukushima, Yuka Yasuda, Hironori Kaji   +5 more
exaly   +5 more sources

Spin-Vibronic Mechanism for Intersystem Crossing

Chemical Reviews, 2018
Intersystem crossing (ISC), formally forbidden within nonrelativistic quantum theory, is the mechanism by which a molecule changes its spin state. It plays an important role in the excited state decay dynamics of many molecular systems and not just those containing heavy elements.
Thomas J. Penfold, Etienne Gindensperger, Chantal Daniel, Christel M. Marian   +3 more
openaire   +6 more sources

Elucidating complex triplet-state dynamics in the model system isopropylthioxanthone

iScience, 2022
Summary: We introduce techniques for probing the dynamics of triplet states. We employ these tools, along with conventional techniques, to develop a detailed understanding of a complex chemical system: a negative-tone, radical photoresist for multiphoton
Nikolaos Liaros, Sandra A. Gutierrez Razo, Matthew D. Thum, Hannah M. Ogden, Andrea N. Zeppuhar, Steven Wolf, Tommaso Baldacchini, Matthew J. Kelley, John S. Petersen, Daniel E. Falvey, Amy S. Mullin, John T. Fourkas   +11 more
doaj   +1 more source

Visualizing excited state dynamics of conjugated molecules trough femtosecond stimulated Raman scattering [PDF]

EPJ Web of Conferences, 2019
The reaction pathway in the photoexcited model compound 2-methyl-5-phenylthiophene has been unravelled by Femtosecond Stimulated Raman Scattering and quantum chemical calculations.
Giovanni Batignani, Emanuele Pontecorvo, Carino Ferrante, Massimiliano Aschi, Christopher G. Elles, Tullio Scopigno   +5 more
doaj   +1 more source

Direct observation of structural dynamics upon photo-excitation in a spin crossover crystal with femtosecond electron diffraction [PDF]

EPJ Web of Conferences, 2019
Photoinduced spin transitions are studied by femtosecond electron diffraction to understand ultrafast structural dynamics associated with intersystem crossing.
Jiang Yifeng, Liu Lai Chung, Müller-Werkmeister Henrike M., Lu Cheng, Zhang Dongfang, Field Ryan L., Sarracini Antoine, Moriena Gustavo, Collet Eric, Miller R. J. Dwayne   +9 more
doaj   +1 more source

Optical properties of Ge-oxygen defect center embedded in silica films [PDF]

, 2007
The photo-luminescence features of Ge-oxygen defect centers in a 100nm thick Ge-doped silica film on a pure silica substrate were investigated by looking at the emission spectra and time decay detected under synchrotron radiation excitation in the 10-300
Agnello, Agnello, Amossov, Anedda, Bagratashvili, Cannizzo, Cannizzo, E. Quartarone, F. Messina, Leone, Leone, M. Cannas, Martini, Neusterv, R. Boscaino, S. Agnello, S. Grandi, Skuja, Skuja, Takahashi, Trukhin   +20 more
core   +1 more source

Intersystem Crossing in Diplatinum Complexes

The Journal of Physical Chemistry A, 2016
Intersystem crossing (ISC) in solid [(C4H9)4N]4[Pt2(μ-P2O5(BF2)2)4], abbreviated Pt(pop-BF2), is remarkably slow for a third-row transition metal complex, ranging from τISC ≈ 0.9 ns at 310 K to τISC ≈ 29 ns below 100 K. A classical model based on Boltzmann population of one temperature-independent and two thermally activated pathways was previously ...
Lam, Yan Choi, Gray, Harry B., Winkler, Jay R.   +2 more
openaire   +3 more sources

Intersystem crossing in thiobases proceeds by a dark intermediate state [PDF]

EPJ Web of Conferences, 2019
4-thiouracil (4TU) is studied by transient absorption spectroscopy employing sub-20 fs UV-pulses and hybrid QM(CASPT2) / MM(AMBER) computations (static and dynamic), evidencing that, along the photoexcited relaxation pathway, intersystem crossing ...
Teles-Ferreira Danielle Cristina, Borrego-Varillas Rocio, Ganzer Lucia, Nogueira Faria Barbara Elza, Manzoni Cristian, De Silvestri Sandro, Nenov Artur, Conti Irene, Garavelli Marco, Cerullo Giulio, de Paula Ana Maria   +10 more
doaj   +1 more source

Measurement of the intersystem crossing rate in aluminum tris(8-hydroxyquinoline) and its modulation by an applied magnetic field [PDF]

, 2009
Copyright 2009 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
Gillin, WP, Kreouzis, T, Song, JY, Zhang, SJ   +3 more
core   +1 more source

Intersystem Crossing Processes of Acridine [PDF]

Bulletin of the Chemical Society of Japan, 1977
Abstract The T1(π, π*)→T3(π, π*) absorption of acridine has first been observed at about 985 nm in ethanol. Temperature dependences of the fluorescence lifetime and the triplet yield of acridine were investigated in poly(vinyl alcohol) film, and it was found that the intersystem crossing from the first excited singlet state S1(π, π*) to ...
Koichi Kikuchi, Koji Uji-ie, Yoshikatsu Miyashita, Hiroshi Kokubun   +3 more
openaire   +1 more source