Control of arrangement for carbazole group in fluorinated comb copolymers by method of organized films

Control of orientation for functional carbazole groups in comb copolymer was carried out by co-polymerization with long-chain vinyl compound and method of organized molecular films. Further, their structural estimation was performed by in-plane X-ray diffraction (XRD) and near-edge X-ray absorption fine structure (NEXAFS) spectroscopy. In the bulk state, fluorinated comb copolymers form side-chain crystal for a two-dimensional lattice spacing of 5.0 Å. From the in-plane XRD measurement of multilayers on solids, changes in the two-dimensional lattice structure of fluorinated comb copolymer films containing NVCz units, as opposed to their bulk state, were confirmed. In this case, polarized NEXAFS measurement showed that highly ordered orientation of carbazole groups was attained in the films. It is considered that this well-ordered arrangement of functional groups is caused by enhancement of π–π interaction between the carbazole rings.