Photo Alignment Behaviour of Polyethene Imine Having Cyano Azobenzene Side Chain

Abstract

New type of polyethene imine having cyano (-CN) side chain through six methylene spacer group (PEI6C) was successfully synthesised and characterised. The effect of reaction parameters on degree of substitution of PEI6C was also studied and the reaction conditions were optimised. Photochemical as well as photoorientational behaviour of the polymer were investigated. PEI6C in solid film exhibited photoresponsive properties upon irradiation with UV and visible light. PEI6C film also exhibited reversible molecular orientation from random state to out-of-plane and from out-of-plane to random state upon non-polarised visible and UV light irradiation.

Synthesis and radical copolymerization of 2‐(4‐((4‐isocyanophenyl)diazenyl)phenoxy)ethyl‐3‐phenylacrylate with maleic anhydride

“…Synthesis of 4‐hydroxy‐4‐cyanoazobenzene (1) was provided by Scheme 1 according to the procedure described in Reference 17. Aqueous solution, 30 ml, of NaNO 2 (0.045 mol) was dropwise added to 14 ml solution of 4‐aminobenzonitrile (0.045 mol) and concentrated HCl at 5°C.…”

“…The ability of azo groups undergoing photochemical trans‐cis isomerization was shown. The cis‐trans isomerization of azo groups is used in preparation of light‐sensitive materials for recording and storing information 16,17 …”