Vibrational Linear Dichroism

Vibrational linear dichroism (VLD) is the differential absorption between two orthogonal, linearly polarized light (A = A_|| – A_⊥ ). It is a measurement of the regularity of molecular orientations in a bulk sample.

SETUP

PEM Setting: half-wave retardation (λ/2)
Polarization Modulation: bottom || and ⊥ linear polarization
Lock-in reference: PEM’s 2nd harmonic (2f)

APPLICATIONS

Structural study and characterization for polymers; single crystals; liquid crystals; biochemical systems

PEMs

II/ZS37
II/CF57

FURTHER READING

L. A. Nafie and M. Diem, Appl. Spectrsc. 33, 130 (1979).

C. Marcott, Appl. Spectrsc. 38 , 442 (1984).

L. A. Nafie, Advances in Applied Fourier Transform Infrared Spectroscopy, ed. M. W. Mackenzie, (John Wiley & Sons, Chichester, 1988) p67.

T. Buffeteau and M. Pezolet, Appl. Spectrsc. 50, 948 (1996).

Contact us for more information about using PEMs in a VLD set-up.