Block diagram of the vertical-type universal chiroptical spectrophotometer (UCS-2): Mo; monochrometor, ; polarizer, PM; pulse motor, St; stage controller, LA; lock-in amplifier, PMT1 and 2; photomultiplier for transmission and DR, P.P; photomultiplier power supply, and PC; personal computer.
(A) Optical arrangement showing two alternative PEM positions (A and B) in UCS-2; Mo; monochromator, ; polarizer, ; right angle prism, PMT; photomultiplier tube, I; integrating sphere. (B) Transmission (upper) and DR (bottom) CD base lines of UCS-2 depending on the alternative PEM positions [A (dotted line) and B (solid line)].
Efficiency curve calculated from transmission CD and DRCD spectra at constant high tension voltage applied to temperature. (Inset) Figure is adopted and modified from Ref. 16.
DRCD and DRLD base line shifts of UCS-2; a (solid line): ideal Teflon diffuser, b (dotted line): lustrous paper, c (long dashed and short dashed line): filter paper, d (broken line): normal white paper.
DRCD spectra of - (solid line) and -ACS (dotted line) microcrystallines pulverized to small particles. (Inset) Their transmittance CD spectra in solution state.
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