Interplay between polarity and chirality in the electric-field-responsive columnar phase of a dipeptide derivative.

2012年4月13日 NPG Asia Materials 4, e12 (2012) doi:10.1038/am.2012.20



Naomi Koizumi, Govindaswamy Shanker, Fumito Araoka, Ken Ishikawa, Channabasaveshwar V Yelamaggad & Hideo Takezoe

Columnar liquid crystals: Promising peptide properties
Hideo Takezoe and colleagues have described an unusual electro-optical behaviour of peptide derivatives. Studying biomolecules and their properties is important in order to gain better understanding of biosystems, as well as in the design of biomimetic materials for specific purposes. Some polypeptide derivatives are known to have the ability to form liquid crystalline columns. Studying such a dipeptide-based molecule, Takezoe and co-workers succeeded in forming a very large domain of columns ordered in two dimensions and observed that, under an external electric field judiciously chosen, the columns rotate around their long axis. Moreover, the angle and direction of the rotation depend on the strength and direction of the field. The phenomenon is accompanied by a change in optical properties and arises, as the researchers propose, through an interplay between polarity and chirality within the columns.


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