DOUBLE-BEAM NANOSECOND LASER FLASH-PHOTOLYSIS FOR PRECISE MEASUREMENTOF SMALL ABSORBANCES IN TRANSIENT SPECTROSCOPY - OBSERVATION OF DECAYPROFILE OF THE EXCITED TRIPLET-STATE OF TETRAPHENYLPORPHYRINATOANTIMONY(V) WITH ABSORBENCY SMALLER THAN 0.01

Authors
KUBOMURA K INOUE H
Citation
K. Kubomura et H. Inoue, DOUBLE-BEAM NANOSECOND LASER FLASH-PHOTOLYSIS FOR PRECISE MEASUREMENTOF SMALL ABSORBANCES IN TRANSIENT SPECTROSCOPY - OBSERVATION OF DECAYPROFILE OF THE EXCITED TRIPLET-STATE OF TETRAPHENYLPORPHYRINATOANTIMONY(V) WITH ABSORBENCY SMALLER THAN 0.01, Research of chemical intermediates, 21(8-9), 1995, pp. 923-932
Citations number
8
Categorie Soggetti
Chemistry
Journal title
Research of chemical intermediates → ACNP
ISSN journal
09226168
Volume
21
Issue
8-9
Year of publication
1995
Pages
923 - 932
Database
ISI
SICI code
0922-6168(1995)21:8-9<923:DNLFFP>2.0.ZU;2-Q
Abstract
Double beam laser flash photolysis has been newly developed for precis e measurement of small absorbances in transient spectroscopy. The moni toring light beam was divided into two parts; one beam for monitoring the sample and a reference one. The two beams were simultaneously moni tored by two similar independent photomultipliers and recorded on a tw o channel digital storage oscilloscope. The method enabled observation of signals within the full range of the pulse width of Xe lamp around 100 mu s. Even a decay profile with extremely small absorbance around 0.01 of transient such as the excited triplet state of metalloporphyr ins was precisely observed by the double beam method.