摘要

The geometries of eight unsymmetrical squaraine dyes have been optimized by ab initio method at the 6 - 31G (d, p) basis set. The quantitative relationships between their intramolecular charge - transfer degrees and their dark decay values, their photosensitivity, and the largest wavelengths of their absorption spectra have been studied. The results indicate that their intramolecular charge - transfer characteristics is an important factor which affects their photoconductivity and the largest wavelengths of their absorption spectra.