EXCITED-STATES AND EMISSION-SPECTROSCOPY OF ORGANOMETALLIC COMPOUNDS INTERPRETED BY TIME-DEPENDENT THEORY

Luminescence spectra of organometallic molecules in crystals or glasse s are discussed and interpreted by using the time-dependent theory of electronic spectroscopy. Emphasis is placed on determining bond length and bond angle changes (excited-state distortions) between the ground and excited electronic states. The physical meaning of the dynamic pr ocesses and the molecular properties are described and illustrated wit h both theoretical calculations and experimental spectra. The discussi on begins with spectra involving only one displaced normal mode, and c ontinues with the effects of multiple normal modes. Both common featur es and unusual effects (the 'Beat' and the 'MIME') are described and i nterpreted. Finally, the effects of normal mode coupling and of electr onic state coupling are briefly described. (C) 1998 Elsevier Science S .A.