Abstract
The acridinediones have been reported earlier as a new class of the laser dyes. The absorption and fluorescence spectra of the different substituted acridinediones have been recorded in different solvents and the difference in the dipole moment between the ground and excited state has been obtained. The value of the Onsager cavity radius was calculated from the radius obtained from the surface area using the software PCMODEL. The ground state dipole moment has been obtained using Guggenheim's method. The results were used to obtain the first excited singlet state dipole moment of the acridinedione dyes by the solvatochromic shift method.
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