Temperature dependent emission properties of rhenium(I) tricarbonyl complexes containing alkyl- and aryl-substituted phenanthrolines as ligands
- Univ. of North Carolina, Charlotte, NC (United States)
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.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 476861
- Journal Information:
- Inorganic Chemistry, Journal Name: Inorganic Chemistry Journal Issue: 21 Vol. 34; ISSN 0020-1669; ISSN INOCAJ
- Country of Publication:
- United States
- Language:
- English
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