EFFECTS OF GEOMETRY AND HYDROGEN-BONDING ON THE EXCITED TRIPLET-STATES OF 4-NITROPYRIDINE N-OXIDE AND DERIVATIVES

被引：9

作者：

EHARA, T ^{[1
]}

AKIYAMA, K ^{[1
]}

IKOMA, T ^{[1
]}

IKEGAMI, Y ^{[1
]}

TEROKUBOTA, S ^{[1
]}

机构：

[1] TOHOKU UNIV,INST CHEM REACT SCI,AOBA KU,SENDAI,MIYAGI 980,JAPAN

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1995年 / 99卷 / 08期

关键词：

D O I：

10.1021/j100008a009

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：

Time-resolved EPR and phosphorescence spectra have been observed for the lowest excited triplet states of 4-nitropyridine N-oxide and its alkyl derivatives. It has been shown that the ratio of the zero-field-splitting (zfs) parameters reflects the molecular geometry: the \E/D\ value decreases with increasing the twisting angle of the nitro group from the molecular plane. Protic solvents induce significant changes in the zfs parameters and the population ratio of the triplet sublevels. The results are discussed in terms of formation of the hydrogen bonding complex at the N-oxide oxygen atom.

引用

页码：2292 / 2295

页数：4

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