Transient absorption spectroscopy detection of sensitized delayed fluorescence in chiral benzophenone/naphthalene systems

被引：6

作者：

Bonancia, Paula ^{[1
]}

Consuelo Jimenez, M. ^{[1
]}

Miranda, Miguel A. ^{[1
]}

机构：

[1] Univ Politecn Valencia, Dept Quim, Inst Tecnol Quim, CSIC, E-46071 Valencia, Spain

来源：

CHEMICAL PHYSICS LETTERS | 2011年 / 515卷 / 1-3期

关键词：

TRIPLET EXCIPLEXES; DEACTIVATION; MOLECULES; SPECTRA; ENERGY; OXYGEN; STATE;

D O I：

10.1016/j.cplett.2011.08.096

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Transient absorption spectroscopy has proven to be a powerful tool to investigate the formation and decay of excited singlet states upon triplet-triplet annihilation, following T-T energy transfer from a selectively excited sensitizer. Thus, upon selective excitation of benzophenone (BZP) by laser flash photolysis (LFP) at lambda = 355 nm in the presence of naphthalene (NPT), a negative band centered at 340 nm has been detected, with growth and decay in the microsecond timescale. It has been assigned to the P-type NPT delayed-fluorescence. In the case of chiral BZP/NPT systems, stereodifferentiation has been observed in the kinetics of the involved photophysical processes. (C) 2011 Elsevier B. V. All rights reserved.

引用

页码：194 / 196

页数：3

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