Conjugation-Length Dependence of the T1Lifetimes of Carotenoids Free in Solution and Incorporated into the LH2, LH1, RC, and RC-LH1 Complexes:  Possible Mechanisms of Triplet-Energy Dissipation†

Biochemistry ◽  
2007 ◽  
Vol 46 (8) ◽  
pp. 2181-2197 ◽  
Author(s):  
Yoshinori Kakitani ◽  
Junji Akahane ◽  
Hidekazu Ishii ◽  
Hiroshi Sogabe ◽  
Hiroyoshi Nagae ◽  
...  
Keyword(s):  
Energy Dissipation ◽  
Conjugation Length ◽  
Triplet Energy ◽  
Length Dependence

scholarly journals Conjugation-Length Dependence of the T1Lifetimes of Carotenoids Free in Solution and Incorporated into the LH2, LH1, RC, and RC-LH1 Complexes:  Possible Mechanisms of Triplet-Energy Dissipation

Biochemistry ◽  
2007 ◽  
Vol 46 (51) ◽  
pp. 15208-15208
Author(s):  
Yoshinori Kakitani ◽  
Junji Akahane ◽  
Hidekazu Ishii ◽  
Hiroshi Sogabe ◽  
Hiroyoshi Nagae ◽  
...  
Keyword(s):  
Energy Dissipation ◽  
Conjugation Length ◽  
Triplet Energy ◽  
Length Dependence

scholarly journals Triplet energies and excimer formation in meta - and para -linked carbazolebiphenyl matrix materials

2015 ◽  
Vol 373 (2044) ◽  
pp. 20140446 ◽  
Author(s):  
Sergey A. Bagnich ◽  
Alexander Rudnick ◽  
Pamela Schroegel ◽  
Peter Strohriegl ◽  
Anna Köhler
Keyword(s):  
Excited State ◽  
Triplet State ◽  
Spectroscopic Investigation ◽  
Triplet Excited State ◽  
Conjugation Length ◽  
Triplet Energy ◽  
Excimer Formation

We present a spectroscopic investigation on the effect of changing the position where carbazole is attached to biphenyl in carbazolebiphenyl (CBP) on the triplet state energies and the propensity to excimer formation. For this, two CBP derivatives have been prepared with the carbazole moieties attached at the ( para ) 4- and 4 ′ -positions ( p CBP) and at the ( meta ) 3- and 3 ′ -positions ( m CBP) of the biphenyls. These compounds are compared to analogous m CDBP and p CDBP, i.e. two highly twisted carbazoledimethylbiphenyls, which have a high triplet energy at about 3.0 eV and tend to form triplet excimers in a neat film. This torsion in the structure is associated with localization of the excited state onto the carbazole moieties. We find that in m CBP and p CBP, excimer formation is prevented by localization of the triplet excited state onto the central moiety. As conjugation can continue from the central biphenyls into the nitrogen of the carbazole in the para -connected p CBP, emission involves mainly the benzidine. By contrast, the meta -linkage in m CBP limits conjugation to the central biphenyl. The associated shorter conjugation length is the reason for the higher triplet energy of 2.8 eV in m CBP compared with the 2.65 eV in p CBP.

scholarly journals Second-order polarizability of donor—acceptor substituted oligothiophenes: substituent variation and conjugation length dependence

1993 ◽  
Vol 173 (2) ◽  
pp. 305-314 ◽  
Author(s):  
Frank Würthner ◽  
Franz Effenberger ◽  
Rüdiger Wortmann ◽  
Peter Krämer
Keyword(s):  
Second Order ◽  
Conjugation Length ◽  
Length Dependence ◽  
Donor Acceptor

scholarly journals Energy dissipative photoprotective mechanism of carotenoid spheroidene from the photoreaction center of purple bacteria Rhodobacter sphaeroides

2015 ◽  
Vol 17 (36) ◽  
pp. 23468-23480 ◽  
Author(s):  
Sundaram Arulmozhiraja ◽  
Naoki Nakatani ◽  
Akira Nakayama ◽  
Jun-ya Hasegawa
Keyword(s):  
Energy Dissipation ◽  
Rhodobacter Sphaeroides ◽  
Purple Bacteria ◽  
Minimum Energy ◽  
Intersystem Crossing ◽  
Triplet Energy ◽  
Energy Dissipation Mechanism ◽  
Dissipation Mechanism ◽  
Crossing Point

Triplet energy dissipation mechanism of a carotenoid: just bond twisting and stretching lead to minimum energy intersystem crossing point.

.chi.(3)Dispersion measurements of the conjugation length dependence of carotenoid derivatives

1993 ◽  
Vol 97 (34) ◽  
pp. 8675-8677 ◽  
Author(s):  
K. H. Haas ◽  
A. Ticktin ◽  
A. Esser ◽  
H. Fisch ◽  
J. Paust ◽  
...  
Keyword(s):  
Conjugation Length ◽  
Length Dependence

Conjugation Length Dependence of Internal Conversion in Carotenoids: Role of the Intermediate State

2004 ◽  
Vol 93 (16) ◽  
Author(s):  
D. Polli ◽  
G. Cerullo ◽  
G. Lanzani ◽  
S. De Silvestri ◽  
K. Yanagi ◽  
...  
Keyword(s):  
Intermediate State ◽  
Internal Conversion ◽  
Conjugation Length ◽  
Length Dependence

Triplet energy transfer of the intramolecular system having benzophenone and dibenz[b,f]azepine at the chain ends: chain length dependence

1991 ◽  
Vol 95 (9) ◽  
pp. 3480-3486 ◽  
Author(s):  
Hideaki Katayama ◽  
Shogo Maruyama ◽  
Shinzaburo Ito ◽  
Yoshinobu Tsujii ◽  
Akira Tsuchida ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Chain Length ◽  
Triplet Energy ◽  
Length Dependence ◽  
Triplet Energy Transfer

Chain-length dependence of the third-order polarizability of disubstituted polyenes: effects of end groups and conjugation length

1993 ◽  
Vol 97 (37) ◽  
pp. 9385-9391 ◽  
Author(s):  
Germain Puccetti ◽  
Mireille Blanchard-Desce ◽  
Isabelle Ledoux ◽  
Jean Marie Lehn ◽  
Joseph Zyss
Keyword(s):  
Chain Length ◽  
Conjugation Length ◽  
Third Order ◽  
The Third ◽  
Length Dependence ◽  
End Groups

Triplet Energy Dissipation in Methylenecyclopropane Rearrangement

2007 ◽  
Vol 72 (21) ◽  
pp. 7930-7938 ◽  
Author(s):  
Xavier Creary ◽  
Andrea Losch ◽  
William Sullivan
Keyword(s):  
Energy Dissipation ◽  
Triplet Energy
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