Istituto di Biofisica     
Gallot B., Fafiotte M., Fissi A., Pieroni O. Liquid-crystalline structure of poly(L-lysine) containing azobenzene units in the side chain. In: Macromolecular Rapid Communications, vol. 17 (8) pp. 493 - 501. Wiley, 1996.
The structure of poly(L-lysine) containing 44% azobenzene units in the side chain was studied by X-ray diffraction between room temperature and 150C. The polymer exhibits a mesomorphic structure of the smectic A1 type. In this structure, stable at least until 150C, each smectic layer of thickness d results from the superposition of two layers: one of thickness dA contains the free lysine side chains, the other of thickness dB contains the azobenzene modified lysine side chains and the polypeptide main chains, that in their planes are arranged as in the antiparallel -structure classical for polypeptides.
DOI: 10.1002/marc.1996.030170801

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