Triplet-state photoexcitations and triplet-energy transfer in poly(3-alkylthiophene)/C/sub 60/ solutions

1994 ◽  
Author(s):  
R.A.J. Lanssen ◽  
N.S. Sariciftci ◽  
A.J. Heeger
Keyword(s):  
Energy Transfer ◽  
Triplet State ◽  
Triplet Energy ◽  
Triplet Energy Transfer

Triplet–Triplet Energy Transfer as a Reason for Quenching by Thionine of the Triplet State of Eosin in Complexes with Cucurbit[7, 8]urils in Water

2019 ◽  
Vol 53 (1) ◽  
pp. 22-25 ◽  
Author(s):  
T. V. Fedotova ◽  
V. N. Gutrov ◽  
G. V. Zakharova ◽  
A. K. Chibisov ◽  
M. V. Alfimov
Keyword(s):  
Energy Transfer ◽  
Triplet State ◽  
Triplet Energy ◽  
Triplet Energy Transfer

Intramolecular photosensitization of the pinene–ocimene rearrangement

2003 ◽  
Vol 81 (6) ◽  
pp. 669-672 ◽  
Author(s):  
Kevin McMahon ◽  
Peter J Wagner
Keyword(s):  
Energy Transfer ◽  
Triplet State ◽  
Uv Irradiation ◽  
Ring Opening ◽  
Para Position ◽  
Intramolecular Energy Transfer ◽  
Triplet Energy ◽  
Triplet Energy Transfer ◽  
Methylene Group

Bonding of nopol to the para position of acetophenone produces 5,5-dimethyl-2-(2-(p-acetylphenoxy)ethyl)bicyclo[3.1.1]hept-2-ene 1, which contains two chromophores: a para-alkoxyacetophenone and an α-pinene, connected by a single methylene group. UV irradiation of 1 in both benzene and methanol produces none of the intramolecular [2 + 2] cycloaddition that most para-(3-buten-1-oxy)acetophenones undergo. Instead, the pinene unit rearranges to a triene skeleton identical to that of ocimene, a known photoproduct of pinene. At modest conversion the diene portion of the triene is cis but gradually is converted to a 52:48 trans:cis ratio. It is concluded that intramolecular triplet energy transfer from the excited ketone chromophore forms the 1,2-biradical triplet state of the pinene moiety, which then undergoes cyclobutylcarbinyl ring opening to a 1,4-biradical that cleaves to the 1,3,6-triene structure of ocimene. This mechanism is suggested to be responsible for the earlier reported intermolecularly sensitized rearrangement of α-pinene to the ocimene isomers.Key words: intramolecular energy transfer, triplet pinene, cyclobutylcarbinyl ring opening, photosensitization.

scholarly journals Intra-molecular triplet energy transfer is a general approach to improve organic fluorophore photostability

2016 ◽  
Vol 15 (2) ◽  
pp. 196-203 ◽  
Author(s):  
Qinsi Zheng ◽  
Steffen Jockusch ◽  
Gabriel G. Rodríguez-Calero ◽  
Zhou Zhou ◽  
Hong Zhao ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Triplet State ◽  
Triplet Energy ◽  
Triplet Energy Transfer ◽  
Organic Fluorophore

The performance of structurally distinct fluorophores can be dramatically enhanced by intra-molecular triplet state quenching.

scholarly journals Triplet state formation and quenching dynamics of 2-mercaptobenzothiazole in solution

2016 ◽  
Vol 18 (37) ◽  
pp. 26224-26235 ◽  
Author(s):  
Daisuke Koyama ◽  
Andrew J. Orr-Ewing
Keyword(s):  
Energy Transfer ◽  
Triplet State ◽  
State Formation ◽  
Absorption Spectroscopy ◽  
Triplet Energy ◽  
Time Resolved ◽  
Vibrational Absorption ◽  
Triplet Energy Transfer

An adduct-mediated triplet energy transfer from a triplet thione to an alkene is observed with time-resolved vibrational absorption spectroscopy.

Intramolecular triplet–triplet energy transfer enhanced triplet–triplet annihilation upconversion with a short-lived triplet state platinum(ii) terpyridyl acetylide photosensitizer

RSC Advances ◽  
2015 ◽  
Vol 5 (86) ◽  
pp. 70640-70648 ◽  
Author(s):  
Shuai Yu ◽  
Yi Zeng ◽  
Jinping Chen ◽  
Tianjun Yu ◽  
Xiaohui Zhang ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Triplet State ◽  
Triplet Energy ◽  
Triplet Energy Transfer ◽  
Triplet Triplet Annihilation

A triplet–triplet annihilation upconversion system with a short-lived triplet state photosensitizer was constructed and enhanced by the design of intramolecular triplet–triplet energy transfer.

Sign in / Sign up

Export Citation Format

Share Document