The change in electric dipole moment and molecular polarizability of indocarbocyanine (ICC) in Langmuir-Blodgett films upon excitation into Sj is estimated to be 5.3 Γ 10 -32 C m (0.016 D) and 3.5 x 10 -40 J-~ C 2 m 2 (3.1 in units of 4'rre o A~). respectively, based on the electroabsorption spectra
External electric field effects on fluorescence intensity and decay of pyrimidine vapor
β Scribed by Nobuhiro Ohta; Takeshi Takemura
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 487 KB
- Volume
- 169
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
β¦ Synopsis
Fluorescence quenching by an external electric field (E) is observed in pyrimidine vapor on excitation into S, under the collision-free conditions. Fluorescence decay is also found to be affected by E. The electric field effects both on intensity and decay are interpreted in terms of a field-induced mixing among rovibrational levels in the triplet manifold.
π SIMILAR VOLUMES
Dynamics following photoexcitation into S 1 of chromophoric thiacyanine (TC) in mixed Langmuir-Blodgett films is affected by an applied electric field, and fluorescence quantum yield of TC is changed by an external electric field. The field dependence of fluorescence is more enhanced in an associate
## Abstract A positive change ΞΞ»/Ξ» of the decay constant of ^99^Tc^m^ has been observed on the application of an external electric field in K~2~TcX~6~ (X = F, Cl, Br, I). For its investigation the Tcβcomplexes were embedded as small conglomerates or more or less as isolated single molecules in a po
Fluorescence-excitation and quantum-yield spectra were measured along the rotational contours of the O-O and lOa: bands of pyrazme and the O-O band of pyrimidme in the vapor phase at low pressure. A marked variation in quantum yield was observed. The yield spectra for the O-O bands exhiiit a very sh
ReceIvcd 6 Aprd 1982 QuanIum beats and fluorescence decays oT the viirmonlsss Sr s1m ofpioolcd pymmc hare been studled JS a iunclion oimagnelic field. Founer analysa of the modulated portions ol' these dccsys has yIelded results which arc cons~stcnt wIIh Rsc and secondarder Zeemzr effects occurrmg m