Study on fluorescence spectra of four kinds of pyrazoline dimers

The fluorescence spectra of four kinds of pyrazoline dimers have been studied. Their geometric configurations have been optimized by semi empirical method RHF/AM1 of quantum chemistry. There is no imaginary frequency in vibrational analysis. Their fluorescence spectra have also been calculated by RHF/CIS. The results of the calculation are essentially consistent with the experimental values.