Singlet Fission from Upper Excited Electronic States of Cofacial Perylene Dimer

Singlet fission directly from the upper excited vibrational and electronic states of cofacial perylene dimers, bypassing the relaxed state S , was detected within 50 fs. This process competes well with vibrational cooling in S (4.7-7.0 ps) and S → S internal conversion (380 fs). The singlet fission...

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Podrobná bibliografia
Vydané v:	The journal of physical chemistry letters Ročník 10; číslo 10; s. 2428
Hlavní autori:	Ni, Wenjun, Gurzadyan, Gagik G, Zhao, Jianzhang, Che, Yuanyuan, Li, Xiaoxin, Sun, Licheng
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	United States 16.05.2019
ISSN:	1948-7185, 1948-7185
On-line prístup:	Zistit podrobnosti o prístupe
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Popis
Shrnutí:	Singlet fission directly from the upper excited vibrational and electronic states of cofacial perylene dimers, bypassing the relaxed state S , was detected within 50 fs. This process competes well with vibrational cooling in S (4.7-7.0 ps) and S → S internal conversion (380 fs). The singlet fission has the energy threshold E = 3.06 eV. Other competitive relaxation processes are excimer and dimer cation formation on an ultrafast time scale. Excitation to higher energy levels (4.96 eV) leads to a higher efficiency of singlet fission.
Bibliografia:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1948-7185 1948-7185
DOI:	10.1021/acs.jpclett.9b00717