Chemical electrooptics and linear dichroism of polyelectrolytes and colloids

Kakorin S, Neumann E (1996)
In: BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS. 100. VCH PUBLISHERS INC: 721-722.

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Abstract
Recently the controversial discussion on the reliability of electrooptical relaxation data of polyelectrolyte systems has been revived. It can be shown that chemical-conformational contributions, for instance, to the dichroitic absorbance changes are exactly given by Delta A(CH)=(Delta A(parallel to) +2 .Delta(perpendicular to))/3, where Delta A(parallel to) and Delta A(perpendicular to) are the measured at the light polarization modes sigma=0 degrees (parallel to) and sigma=90 degrees (perpendicular to), respectively. Alternatively, Delta A(CH)=Delta A(sigma)* where sigma*=54.7 degrees is the magic angle (for small absorbance changes). If Delta A(sigma) is measured at the various sigma-polarization modes according to Delta A(sigma)=Delta A(parallel to) cos(2) sigma+Delta A(perpendicular to) sin(2) sigma, the exact value of Delta A(CH) is readily obtained. On the other hand, the linear dichroism Delta A=Delta A(OR)(parallel to) -Delta A(perpendicular to)=Delta A(parallel to) -Delta A(perpendicular to)+(Delta A(CH)(parallel to)-Delta A(CH)(perpendicular to)) can only be determined as an approximation of the difference Delta A(-)=Delta A(perpendicular to), if Delta A(CH)(parallel to) and Delta A(CH)(perpendicular to) are smaller or approximately equal.
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Kakorin S, Neumann E. Chemical electrooptics and linear dichroism of polyelectrolytes and colloids. In: BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS. Vol 100. VCH PUBLISHERS INC; 1996: 721-722.
Kakorin, S., & Neumann, E. (1996). Chemical electrooptics and linear dichroism of polyelectrolytes and colloids. BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 100(6), 721-722.
Kakorin, S., and Neumann, E. (1996). “Chemical electrooptics and linear dichroism of polyelectrolytes and colloids” in BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS, vol. 100, (VCH PUBLISHERS INC), 721-722.
Kakorin, S., & Neumann, E., 1996. Chemical electrooptics and linear dichroism of polyelectrolytes and colloids. In BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS. no.100 VCH PUBLISHERS INC, pp. 721-722.
S. Kakorin and E. Neumann, “Chemical electrooptics and linear dichroism of polyelectrolytes and colloids”, BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS, vol. 100, VCH PUBLISHERS INC, 1996, pp.721-722.
Kakorin, S., Neumann, E.: Chemical electrooptics and linear dichroism of polyelectrolytes and colloids. BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS. 100, p. 721-722. VCH PUBLISHERS INC (1996).
Kakorin, Sergej, and Neumann, Eberhard. “Chemical electrooptics and linear dichroism of polyelectrolytes and colloids”. BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS. VCH PUBLISHERS INC, 1996.Vol. 100. 721-722.
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