Grafting a mesomorphic Schiff base onto gold nanoparticle via ester link – photoluminescence, mesomorphism, electrical conductivity and antioxidant activity

Das, Nirmalendu; Borah, Debasish; Acharya, Himadri; Choudhury, Sudip; Prasad, S. Krishna; Rao, D.S. Shankar; Bhattacharjee, Chira R.

doi:10.6084/m9.figshare.7057604.v1

tlct_a_1515372_sm1637.pdf (618.65 kB)

Grafting a mesomorphic Schiff base onto gold nanoparticle via ester link – photoluminescence, mesomorphism, electrical conductivity and antioxidant activity

journal contribution

posted on 2018-09-07, 05:22 authored by Nirmalendu Das, Debasish Borah, Himadri Acharya, Sudip Choudhury, S. Krishna Prasad, D.S. Shankar Rao, Chira R. Bhattacharjee

Liquid crystal-gold nanoparticle (GNP-LC) composite were accessed via covalent coupling of 4-mercaptophenol capped gold nanoparticles (GNP) and a carboxylic acid functionalised rod shaped mesomorphic Schiff base (LC). The Schiff base ligand and the composite both showed schlieren texture with distinct difference in phase transition temperature. The X-ray diffraction study suggested a smectic C mesophase for the compounds. The LC and GNP-LC, both exhibited room temperature photoluminescence when excited at 264nm.The transmission electron micrography revealed the composite to be nearly monodisphersed having almost spherical shape of ~ 2nm size. The composite material in addition to being mesomorphic exhibited pronounced AC conductivity in the semiconductor domain and antioxidant activity.