Studies on monolayer and langmuir-blodgett films of schiff-base complex 1,2-bis(3-thiophene imine) ethylene

Abstract

The Langmuir-Blodgett (LB) technique makes it possible to prepare a thin film with a controlled thickness at the molecular level and a well-defined molecular orientation. In this work, 1,2-bis(3-thiophene imine) ethylene (B3TIE) were synthesized by reacting benzaldehyde and Ethylenediamine and were characterized by MS, IR, 1 HNMR, 13 CNMR. B3TIE monolayer and LB films were prepared through LB technology and characterized by Water contact angle analysis, FT-IR, UV-vis, CV and AFM. An electrochemical study of B3TIE monolayer on ITO was carried out. The cyclic voltammetric data revealed that the reduction on ITO was irreversible. Meanwhile, layer structure and surface morphology of LB films were also explored. The results show that monolayer can be transferred onto the hydrophilic substrates to form regular monolayer and multilayers, in which molecular orientation can be observed from the surface morphology.