A NOVEL FIBER-OPTIC-BASED PUMP-PROBE INSTRUMENT FOR THE ACQUISITION OF KINETIC INFORMATION

被引：2

作者：

CARROLL, MK ^{[1
]}

HIEFTJE, GM ^{[1
]}

机构：

[1] INDIANA UNIV,DEPT CHEM,BLOOMINGTON,IN 47405

来源：

APPLIED SPECTROSCOPY | 1992年 / 46卷 / 02期

关键词：

PUMP-PROBE SPECTROSCOPY; INSTRUMENTATION; FIBER OPTICS; INTERSYSTEM CROSSING; 2,7-DIPHENYLPHENANTHRENE;

D O I：

10.1366/0003702924125465

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A pump-probe instrument is described that utilizes two beams from the same laser and a fiber-optic-based sample cell for low-temperature measurements. The utility of this instrument is demonstrated through an examination of the excited-state kinetics of 2,7-diphenylphenanthrene, for which the rate constant of singlet-to-triplet intersystem crossing is found to be approximately 8 x 10(5) s-1. This molecule is interesting in that it undergoes an unusual rotational conformation change in the triplet state with a rate constant of 2.4 x 10(8) s-1 at 77 K.

引用

收藏

页码：317 / 321

页数：5

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