REMPI spectroscopy of cytosine

被引：148

作者：

Nir, E ^{[1
]}

Müller, M ^{[1
]}

Grace, LI ^{[1
]}

de Vries, MS ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, Dept Chem & Biochem, Santa Barbara, CA 93106 USA

来源：

CHEMICAL PHYSICS LETTERS | 2002年 / 355卷 / 1-2期

基金：

以色列科学基金会;

关键词：

D O I：

10.1016/S0009-2614(02)00180-X

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：

We report resonant two-photon ionization spectra of laser desorbed. jet cooled. cytosine, 1-methyl cytosine, 5-methyl cytosine, and dimers of these. Unlike other pyrimidine bases, cytosine exhibits vibronic spectra with sharp features in two spectral regions, separated by about 5000 cm(-1). We interpret these as being due to two tautomeric forms, one keto and one enol. The dimers absorb at wavelengths that are intermediate between those of the two monomer forms. By UV-UV hole burning we determined the numbers of isomers contributing to each spectrum and by delayed two color ionization we determined triplet lifetimes. We observed hydrogen transfer between bases both in collisions between monomers and after photo-excitation in clusters. (C) 2002 Published by Elsevier Science B.V.

引用

页码：59 / 64

页数：6

共 27 条

[1] THE ELECTRONIC-SPECTRA OF THE PYRIMIDINE-BASES URACIL AND THYMINE IN A SUPERSONIC MOLECULAR-BEAM [J].

BRADY, BB ;

PETEANU, LA ;

LEVY, DH .

CHEMICAL PHYSICS LETTERS, 1988, 147 (06) :538-543

[2] A theoretical investigation of the physical reason for the very different luminescence properties of the two isomers adenine and 2-aminopurine [J].

Broo, A .

JOURNAL OF PHYSICAL CHEMISTRY A, 1998, 102 (03) :526-531

[3] TAUTOMERS OF CYTOSINE BY MICROWAVE SPECTROSCOPY [J].

BROWN, RD ;

GODFREY, PD ;

MCNAUGHTON, D ;

PIERLOT, AP .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1989, 111 (06) :2308-2310

[4] Hydrogen bonding and stacking interactions of nucleic acid base pairs: A density-functional-theory based treatment [J].

Elstner, M ;

Hobza, P ;

Frauenheim, T ;

Suhai, S ;

Kaxiras, E .

JOURNAL OF CHEMICAL PHYSICS, 2001, 114 (12) :5149-5155

[5] The infrared spectroscopy of hydrogen-bonded bridges:: 2-pyridone-(water)n and 2-hydroxypyridine-(water)n clusters, n=1,2 [J].

Florio, GM ;

Gruenloh, CJ ;

Quimpo, RC ;

Zwier, TS .

JOURNAL OF CHEMICAL PHYSICS, 2000, 113 (24) :11143-11153

[6] A NEW THEORETICAL PREDICTION OF THE INFRARED-SPECTRA OF CYTOSINE TAUTOMERS [J].

GOULD, IR ;

VINCENT, MA ;

HILLIER, IH ;

LAPINSKI, L ;

NOWAK, MJ .

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, 1992, 48 (06) :811-818

[7] TAUTOMERISM IN URACIL, CYTOSINE AND GUANINE - A COMPARISON OF ELECTRON CORRELATION PREDICTED BY AB-INITIO AND DENSITY-FUNCTIONAL THEORY METHODS [J].

GOULD, IR ;

BURTON, NA ;

HALL, RJ ;

HILLIER, IH .

JOURNAL OF MOLECULAR STRUCTURE-THEOCHEM, 1995, 331 (1-2) :147-154

[8] HYDROGEN-BONDING IN WATER COMPLEXES - STRUCTURES OF 2-PYRIDONE-H2O AND 2-PYRIDONE-(H2O)2 IN THEIR S0 AND S1 ELECTRONIC STATES [J].

HELD, A ;

PRATT, DW .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1993, 115 (21) :9708-9717

[9] INERTIAL AXIS REORIENTATION IN THE S1[-S0 ELECTRONIC-TRANSITION OF 2-PYRIDONE - A ROTATIONAL DUSCHINSKY EFFECT - STRUCTURAL AND DYNAMIC CONSEQUENCES [J].

HELD, A ;

CHAMPAGNE, BB ;

PRATT, DW .

JOURNAL OF CHEMICAL PHYSICS, 1991, 95 (12) :8732-8743

[10] HYDROGEN-BONDING IN THE SYMMETRY-EQUIVALENT C2H DIMER OF 2-PYRIDONE IN ITS S0 AND S2 ELECTRONIC STATES - EFFECT OF DEUTERIUM SUBSTITUTION [J].

HELD, A ;

PRATT, DW .

JOURNAL OF CHEMICAL PHYSICS, 1992, 96 (07) :4869-4876

← 1 2 3 →