PHASE-MODULATION INFRARED-SPECTROSCOPY AND ITS APPLICATION TO MEASUREMENTS OF PHOTOINDUCED ABSORPTIONS FROM TRANSPOLYACETYLENE

被引：8

作者：

FURUKAWA, Y

机构：

[1] Department of Chemistry, School of Science, University of Tokyo, Bunkyo-ku

来源：

APPLIED SPECTROSCOPY | 1993年 / 47卷 / 09期

关键词：

FOURIER TRANSFORM INFRARED SPECTROSCOPY; PHASE-MODULATION INFRARED SPECTROSCOPY; CONDUCTING POLYMER; POLYACETYLENE; PHOTOEXCITATION;

D O I：

10.1366/0003702934067720

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The outline of phase-modulation infrared spectroscopy is described. The relationship between the frequency-domain response from phase-modulation experiments and the time-domain response from time-resolved experiments is derived. The microsecond dynamics following photoexcitation in trans-polyacetylene has been studied by phase-modulation infrared spectroscopy. The magnitude and phase (or in-phase and quadrature components) of the photo-induced infrared band at 1367 cm-1 have been measured at 78 K with modulation frequencies between 600 Hz and 10.5 kHz by using an experimental setup based on a continuous-scan Fourier transform infrared spectrophotometer. The magnitude of this band shows an approximate omega-0.5 dependence for frequencies below 9 kHz and a rapid decrease above 9 kHz. These results are inconsistent with a unimolecular decay, which should show a dependence of the form omega-1.

引用

页码：1405 / 1410

页数：6

共 28 条

[1] DIRECT OBSERVATIONS OF LIGAND DYNAMICS IN HEMOGLOBIN BY SUBPICOSECOND INFRARED-SPECTROSCOPY [J].