PICOSECOND MAGNETIC CIRCULAR-DICHROISM SPECTROSCOPY

被引：15

作者：

XIE, XL ^{[1
]}

SIMON, JD ^{[1
]}

机构：

[1] UNIV CALIF SAN DIEGO,DEPT CHEM,LA JOLLA,CA 92093

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1990年 / 94卷 / 21期

关键词：

D O I：

10.1021/j100384a006

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A new technique for measuring circular dichroism signals induced by an external magnetic field with picosecond resolution is described. This technique is used to examine the change in magnetic circular dichroism signal of the Q-band absorption of myoglobin following the photodissociation of CO from carbon monoxymyoglobin. The time-dependent data demonstrate (1) the iron undergoes the transition from low to high spin within the instrument response (<20 ps) and (2) there is no measurable structural change of the heme from 20 ps to several nanoseconds. © 1990 American Chemical Society.

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页码：8014 / 8016

页数：3

相关论文

共 25 条

[1] CIRCULAR-DICHROISM STUDIES OF MYOGLOBIN AND CYTOCHROME C DERIVATIVES [J].

BOLARD, J ;

GARNIER, A .

BIOCHIMICA ET BIOPHYSICA ACTA, 1972, 263 (03) :535-&

[2] MAGNETIC OPTICAL ACTIVITY [J].

BUCKINGHAM, AD ;

STEPHENS, PJ .

ANNUAL REVIEW OF PHYSICAL CHEMISTRY, 1966, 17 :399-+

[3] MEASUREMENT OF MAGNETIC CIRCULAR-DICHROISM (MCD) ON A NANOSECOND TIMESCALE [J].

GOLDBECK, RA ;

DAWES, TD ;

MILDER, SJ ;

LEWIS, JW ;

KLIGER, DS .

CHEMICAL PHYSICS LETTERS, 1989, 156 (06) :545-549

[4] SIGN VARIATION IN THE MAGNETIC CIRCULAR-DICHROISM SPECTRA OF PI-SUBSTITUTED PORPHYRINS [J].

GOLDBECK, RA .

ACCOUNTS OF CHEMICAL RESEARCH, 1988, 21 (03) :95-101

[5] MAGNETIC CIRCULAR-DICHROISM STUDIES .67. SUBSTITUENT-INDUCED SIGN VARIATION IN THE MAGNETIC CIRCULAR-DICHROISM OF FREE-BASE PORPHYRINS WITH A SINGLE ELECTRON-WITHDRAWING SUBSTITUENT - THE QUESTION OF N-H PROTON EQUILIBRIUM [J].

GOLDBECK, RA ;

TOLF, BR ;

WEE, AGH ;

SHU, AYL ;

RECORDS, R ;

BUNNENBERG, E ;

DJERASSI, C .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1986, 108 (21) :6449-6458

[6]

HOLMQUIST B, 1986, METHOD ENZYMOL, V130, P270

[7]

HOLMQUIST B, PORPHYRINS, V3

[8]

KAJIYOSHI M, 1975, J BIOCH, P1087

[9] FEMTOSECOND PHOTOLYSIS OF CO-LIGATED PROTOHEME AND HEMOPROTEINS - APPEARANCE OF DEOXY SPECIES WITH A 350-FSEC TIME CONSTANT [J].

MARTIN, JL ;

MIGUS, A ;

POYART, C ;

LECARPENTIER, Y ;

ASTIER, R ;

ANTONETTI, A .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-BIOLOGICAL SCIENCES, 1983, 80 (01) :173-177

[10] OPTICAL ROTATORY DISPERSION OF SPERM-WHALE MYOGLOBIN + ITS DERIVATIVES [J].

SAMEJIMA, T ;

YANG, JT .

JOURNAL OF MOLECULAR BIOLOGY, 1964, 8 (06) :863-&