Hypochromism of poly(<i>N</i>‐vinylcarbazole) in solution

Abstract

Abstract Absorption spectra were measured for poly( N ‐vinylcarbazole) (PNVC), fractionated by means of the gel‐permeation chromatographic technique. The intensities of the UV absorption bands of the carbazolyl group diminished with increasing molecular weight of the polymer from 1200 to ca. 10 4 , and were constant when the molecular weight was higher than 10 4 . The diminution of the absorption intensities was regarded as a hypochromism, and the hypochromism was discussed with respect to the local structure of PNVC in solution.