In:
Review of Scientific Instruments, AIP Publishing, Vol. 52, No. 9 ( 1981-09-01), p. 1311-1316
Abstract:
A new circular dichroism (CD) and magnetic circular dichroism (MCD) system with narrow bandwidth and high scanning rate has been developed. The versatility of the system for the measurements of transient changes in CD and MCD has been also described. This new CD and MCD system is composed of an acoustic optical (AO) filter of TeO2 as a monochromator, a stress modulator, and a photomultiplier together with their operating devices and a computer system. The linearly polarized light from the AO filter is modulated to left- and right-circularly polarized light by a stress modulator operated at 50 kHz. The absorbance difference of the left- and right-circularly polarized light is detected by a photomultiplier, after passing through the sample. The whole optical system and detector system are matched in time by the same computer system. A rapid scanning was performed successfully at the rate of 50 nm range/10 ms, with better spectral resolution and higher signal-to-noise ratio than other commercially available CD spectropolarimeters. Finally, we showed several applications of the new CD and MCD system for the observations of CD and MCD spectral changes in biological molecules.
Type of Medium:
Online Resource
ISSN:
0034-6748
,
1089-7623
Language:
English
Publisher:
AIP Publishing
Publication Date:
1981
detail.hit.zdb_id:
209865-9
detail.hit.zdb_id:
1472905-2
SSG:
11
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