Summary
The compounds Re(CO)3Cl(L)2,L=triphenylphosphine, tri-p-tolyphosphine, and Re(CO)3-Cl(L′),L′=1,2-bis(diethylphosphinoethane) are luminescent in solution and in crystalline form when excited between 351 nm and 514 nm at temperatures ranging from 10 K to room temperature. The absorption spectra contain a weak (E ∼ 10M −1 cm−1) band in the visible region of the spectrum between 400 and 500 nm. The lowest energy transition giving rise to these spectroscopic features is assigned to a d-d transition.
Zusammenfassung
Die Verbindungen Re(CO)3Cl(L)2 mitL=Triphenylphosphin, Tri-p-tolylphosphin und Re(CO)3Cl(L′)2 mitL′=1,2-Bis(diethylphosphinoethan) sind in Lösung und im kristallinen Zustand bei Anregung zwischen 351 und 514 nm im Temperaturbereich von 10 K bis Raumtemperatur lumineszent. Die Absorptionsspektren enthalten im sichtbaren Bereich zwischen 400 und 500 nm eine schwache Bande von ε ∼ 10M −1 cm−1. Der energetisch tiefstliegende Übergang, der für dieses Verhalten verantwortlich ist, wird einem d-d-Übergang zugeordnet.
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Ramsis, M.N. Electronic emission and absorption spectroscopy of the rhenium complexes Re(CO)3Cl(phosphine)2 . Monatsh Chem 124, 849–855 (1993). https://doi.org/10.1007/BF00816407
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DOI: https://doi.org/10.1007/BF00816407