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Development of Fourier Transform Ultraviolet. Visible. Near-Infrared Raman Spectroscopy and its Application to Structural Chemistry

傅里叶变换紫外线的发展。

基本信息

批准号：
01430004
负责人：
TASUMI Mitsuo
金额：
$ 11.52万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (A)
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1990
项目状态：
已结题

项目摘要

Fourier transform (FT) Raman spectrophotometer with 1064 nm excitation is constructed. Resonance Raman spectra of conducting polymers and photosynthetic pigments are studied.(1) Construction of 1064 nm excited FT-Raman spectrophotometerAn FT-Raman spectrophotometer consists mainly of FT-NIR spectrophotometer (JEOL JIR-5500) with an InGaAs detector, continuous-wave Nd : YAG laser (CVI YAGMAX C-92), optics for collecting scattered light, filters for rejection of Rayleigh scattering, etc.(2) Conducting polymersResonance Raman spectra of trans-polyacetylene (PA) films doped with iodine or Na and poly (para-phenylenevinylene) (PPV) films doped with H_2SO_4 or Na are obtained with 1064 nm excitation. As Na content of Na-doped PA increases, two spectral changes corresponding to the increase of electrical conductivity and the appearance of Pauli susceptibility are observed. Raman spectra of Na-doped PPV are ascribed to negative bipolarons on the basis of the data of the divalent anion of an appropriate oligomer.(3) Photosynthetic pigmentsThe 1064 nm excited Raman spectra of bacteriochlorophyll a (BChl a) in various solid films and in chromatophores from a blue-green mutant of Rhodobacter sphaeroides are obtained. Molecular interactions and arrangements of Bchla are discussed on the basis of the C=O stretching wavenumber and CC stretches which are marker bands of the coordination number of central Mg.

研制了1064 nm激发的傅里叶变换（FT）拉曼光谱仪。研究了导电高分子和光合色素的共振拉曼光谱。(1)1064 nm激发的FT-拉曼光谱仪的构建FT-拉曼光谱仪主要由带有InGaAs检测器的FT-NIR分光光度计（JEOL JIR-5500）、连续波Nd：YAG激光器（CVI YAGMAX C-92）、用于收集散射光的光学器件、用于抑制瑞利散射的滤光片等组成。(2)在1064 nm激发下，获得了掺碘、钠的反式聚乙炔（PA）薄膜和掺硫酸、钠的聚对苯撑乙烯（PPV）薄膜的共振拉曼光谱。随着Na掺杂PA中Na含量的增加，观察到两种光谱变化，对应于电导率的增加和泡利磁化率的出现。根据适当低聚物的二价阴离子的数据，将Na掺杂PPV的拉曼光谱归因于负双极化子。(3)光合色素获得了球形红细菌（Rhodobacter sphaeroides）蓝绿突变株的细菌叶绿素a（BChl a）在不同固体膜和色素体中的1064 nm激发拉曼光谱。根据C=O伸缩波数和CC伸缩波数这两个表征中心Mg配位数的标记带，讨论了Bchla分子的相互作用和排列。