Temperature Dependent Emission Properties of Rhenium(I) Tricarbonyl Complexes Containing Alkyl- and Aryl-Substituted Phenanthrolines as Ligands

Autor:	Jon W. Merkert, Lynne Wallace, Donald C. Jackman, D. P. Rillema
Rok vydání:	1995
Předmět:	chemistry.chemical_classification education.field_of_study Stereochemistry Aryl Population chemistry.chemical_element Rhenium Inorganic Chemistry chemistry.chemical_compound Crystallography Fluid solution chemistry Excited state Emission spectrum Physical and Theoretical Chemistry education Alkyl
Zdroj:	Inorganic Chemistry. 34:5210-5214
ISSN:	1520-510X 0020-1669
DOI:	10.1021/ic00125a020
Popis:	The results of the temperature dependence in fluid solution of the emission behavior of a series of [Re(L-L)-(CO){sub 3}py]{sup +} complexes (L-L = 3,4,7,8-Me{sub 4}phen, 4,7-Ph{sub 2}phen, 2,9-Me{sub 2}-4,7-Ph{sub 2}phen, 4,7-Me{sub 2}phen, 5,6-Me{sub 2}phen, 5-Phphen, 2,9-Me{sub 2}phen, and phen) are presented along with an interpretation which assigns the lowest excited state as {sup 3}MLCT, with a contribution from a higher-energy, shorter-lived state of unknown character. The emission lifetime of [Re(3,4,7,8-Me{sub 4}phen)(CO){sub 3}py]{sup +} actually increases with temperature, reaches a maximum at approximately 230 K, and then decreases in the usual manner. This behavior is attributed to population of the lowest {sup 3}LC state, which in this complex lies just above the {sup 3}MLCT emitting state and below the upper state.
Databáze:	OpenAIRE
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