Photophysical and electron transfer studies of a stable carbocation

被引:37
作者
Dileesh, S [1 ]
Gopidas, KR [1 ]
机构
[1] CSIR, Reg Res Lab, Photochem Res Unit, Trivandrum 695019, Kerala, India
关键词
D O I
10.1016/S0009-2614(00)01091-5
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
Photophysical and electron transfer properties of the stable trioxatriangulenium carbocation (1) are reported. Photophysical studies include absorption, fluorescence and phosphorescence spectra, singlet and triplet state quantum yields and lifetimes. Both the singlet and triplet excited states of 1 can accept an electron from donor molecules leading to the formation of the donor radical cation and the radical of 1. In aqueous solution, 1 can photo-oxidize DNA nucleosides such as guanosine and adenosine indicating that 1 may have potential use as a DNA cleaving agent. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:397 / 402
页数:6
相关论文
共 31 条
[11]   Excited singlet state reactions of triphenylpyrylium ion with electron donors: Evidence for electron transfer and the observation of Marcus inverted region for the charge shift in the radical pair [J].
Jayanthi, SS ;
Ramamurthy, P .
JOURNAL OF PHYSICAL CHEMISTRY A, 1997, 101 (11) :2016-2022
[12]  
Johnson D. S., 1996, Comprehensive supramolecular chemistry, P73
[13]  
Lakowicz J. R., 2010, PRINCIPLES FLUORESCE
[14]   Structure and photoinduced electron transfer in exceptionally stable synthetic DNA hairpins with stilbenediether linkers [J].
Lewis, FD ;
Liu, XY ;
Wu, YS ;
Miller, SE ;
Wasielewski, MR ;
Letsinger, RL ;
Sanishvili, R ;
Joachimiak, A ;
Tereshko, V ;
Egli, M .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1999, 121 (42) :9905-9906
[15]   Distance-dependent electron transfer in DNA hairpins [J].
Lewis, FD ;
Wu, TF ;
Zhang, YF ;
Letsinger, RL ;
Greenfield, SR ;
Wasielewski, MR .
SCIENCE, 1997, 277 (5326) :673-676
[16]   EFFECTS OF SOLVENT AND SUBSTITUENTS ON ABSORPTION-SPECTRA OF TRIPLET ACETOPHENONE AND ACETOPHENONE KETYL RADICAL STUDIED BY NANOSECOND LASER PHOTOLYSIS [J].
LUTZ, H ;
BREHERET, E ;
LINDQVIS.L .
JOURNAL OF PHYSICAL CHEMISTRY, 1973, 77 (14) :1758-1762
[17]   Photophysical and electron transfer studies of a few 2,6-dimethyl-4-(alkylphenyl)pyrylium and thiopyrylium derivatives [J].
Manoj, N ;
Kumar, RA ;
Gopidas, KR .
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 1997, 109 (02) :109-118
[18]   FACTORS INFLUENCING BASICITIES OF TRIARYLCARBINOLS SYNTHESIS OF SESQUIXANTHYDROL [J].
MARTIN, JC ;
SMITH, RG .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1964, 86 (11) :2252-&
[19]  
MULLER E, 1967, TETRAHEDRON LETT, P3877
[20]   PHOTOPHYSICS OF 2'-DEOXYURIDINE (DU) NUCLEOSIDES COVALENTLY SUBSTITUTED WITH EITHER 1-PYRENYL OR 1-PYRENOYL - OBSERVATION OF PYRENE-TO-NUCLEOSIDE CHARGE-TRANSFER EMISSION IN 5-(1-PYRENYL)-DU [J].
NETZEL, TL ;
ZHAO, M ;
NAFISI, K ;
HEADRICK, J ;
SIGMAN, MS ;
EATON, BE .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1995, 117 (36) :9119-9128