THE EFFECTS OF CONFORMATION AND COORDINATION TO ZINC(II) IONS ON THE LUMINESCENCE PROPERTIES OF 2,2'-BIPYRIDINE, METHYL-SUBSTITUTED 2,2'-BIPYRIDINES AND 2,2'-BIQUINOLINE

被引：16

作者：

YAGI, M ^{[1
]}

KANESHIMA, T ^{[1
]}

WADA, Y ^{[1
]}

TAKEMURA, K ^{[1
]}

YOKOYAMA, Y ^{[1
]}

机构：

[1] YOKOHAMA NATL UNIV,FAC ENGN,DEPT MAT CHEM,HODOGAYA KU,YOKOHAMA,KANAGAWA 240,JAPAN

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 1994年 / 84卷 / 01期

关键词：

D O I：

10.1016/1010-6030(94)03842-2

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：

Using a 2-propanol-water (i-PrOH-H2O) mixture as a host, luminescence and electron paramagnetic resonance spectra have been observed for the lowest excited states of the trans and metal-free cis conformers of 2,2'-bipyridine (bpy), 4-, 5- and 6-methyl-2,2'-bipyridine (4-,5- and 6-Mebpy), 4,4'-, 5,5'- and 6,6'-dimethyl-2,2'-bipyridine (4,4'- 5,5'- and 6,6'-Me2bpy) and 2,2'-biquinoline (bq) at 77 K. Both trans and cis conformers are non-fluorescent or very weakly fluorescent for bpy. The trans conformer is non-fluorescent or weakly fluorescent in i-PrOH, while the cis conformer is fluorescent in i-PrOH-H2O (33 wt.% i-PrOH) for Mebpys, Me2bpys and bq. The observed fluorescence properties are expected considering that the main character of the lowest excited singlet state changes from 1npi* trans-bq to 1pipi* in cis-bq, while it is 1npi* in both trans and cis conformers of bpy. The Zn2+ complexes with bpy, Mebpys, Me2bpys and bq are fluorescent.

引用

页码：27 / 32

页数：6

共 26 条

[1] STRUCTURE AND BARRIER TO INTERNAL-ROTATION OF BIPHENYL DERIVATIVES IN THE GASEOUS STATE .6. ON THE MOLECULAR-STRUCTURE AND INTERNAL-ROTATION OF 2,2'-BIPYRIDINE [J].