Photochemical ligand substitution changes

The energy of the MLCT excited state (F)oo( MLCT)) can be evaluated from the emission spectrum. Emission peak wavelength (le), emission quantum yields (0e), emission lifetimes (le), and reaction quantum yields of the photochemical ligand substitution reactions ( r) are summarized in Table III. The modification of the bipyridine ligand caused changes in. Boo( MLCT) as large as 2400 cm. ... 

Early photochemical observations with coordination compounds typically amounted to the finding that the known thermal reaction, be it redox decomposition or ligand substitution, was accelerated by light. Such behavior was often referred to as "photocatalysis", as we did in Ref. 1. Later, it seemed better to use more specific terms such as "photochemistry", "photo-induced reaction", "photosubstitution", etc. [19]. There was a progression in the sophistication of photochemical studies. With exceptions, early reports simply noted that the compound changed on exposure to... 

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