COMPARATIVE UV-VISIBLE LUMINESCENCE STUDY OF 1,1'-BINAPHTHYL AND 2,2'-BINAPHTHYL

被引：4

作者：

FADOUACH, M ^{[1
]}

BENALI, B ^{[1
]}

KADIRI, A ^{[1
]}

CAZEAUDUBROCA, C ^{[1
]}

NOUCHI, G ^{[1
]}

机构：

[1] UNIV BORDEAUX 1,CTR PHYS MOLEC OPT & HERTZIENNE,F-33405 TALENCE,FRANCE

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 1992年 / 48卷 / 10期

关键词：

D O I：

10.1016/0584-8539(92)80156-Q

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

The modifications of emission spectra obtained in fluid and rigid media as a function of temperature show a conformation change for 1,1'-binaphthyl in the excited state. This change is facilitated in fluid medium by the rotation of the two naphthyl groups around the C1-C1, bond. The molecular twisting in this excited state explains the original results for 1,1'-binaphthyl where the intensity ratio of phosphorescence to fluorescence (I(ph)/I(fluo)) varies with excitation wavelength. This result agrees with the charge transfer (CT) character obtained by the excited state S2* due to the twist of this molecule. The emission spectra of 2,2'-binaphthyl, a molecule which is practically identical in its electronic structure to 1,1'-binaphthyl, do not undergo significant modification with effects of temperature variation, and as a function of the excitation wavelength. These different effects for 1,1'-binaphthyl and 2,2'-binaphthyl agree with the difference of twist for the naphthyl rings around the single bond between these rings.

引用

页码：1491 / 1500

页数：10

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