Photophysical properties of Re(I) diimine complexes: Observation of room-temperature intraligand phosphorescence

Journal Article · Tue Jan 15 23:00:00 EST 1991 · Journal of the American Chemical Society; (United States)

DOI:https://doi.org/10.1021/ja00002a001· OSTI ID:5124525

Shaw, J R; Schmehl, R H ^[1]

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1. Tulane Univ., New Orleans, LA (United States)

The luminescence behavior of the ligands 4-styryl-4{prime}-methyl-2,2{prime}-bipyridine (mstyb) and 1,4-bis(2-(4{prime}-methyl-2,2{prime}-bipyridyl-4-yl)ethenyl)benzene (dstyb) and the Re(I) complexes (Re(CO){sub 3}(CH{sub 3}CN)(mstyb))(PF{sub 6}) and (Re(CO){sub 3}-(CH{sub 3}CN)){sub 2}(dstyb)(PF{sub 6}){sub 2} is discussed. The dstyb ligand exhibits intense fluorescence at room temperature and in frozen (4:1 ethanol-methanol) solutions. The ligand mstyb does not emit at room temperature, but shows both fluorescence and phosphorescence in frozen solutions in the presence of 10% ethyl iodide. The Re(I) complex of mstyb emits from a {sup 3}MLCT excited state (558 nm) in room-temperature acetonitrile; however, in frozen solutions structured phosphorescence from an intraligand {sup 3}({pi} {yields} {pi}*) state (595 nm) is observed. The dinuclear Re(I) complex of dstyb exhibits structured intraligand phosphorescence (695 nm) in room-temperature solution and in low-temperature glasses.

• OSTI ID: 5124525
• Journal Information: Journal of the American Chemical Society; (United States), Journal Name: Journal of the American Chemical Society; (United States) Vol. 113:2; ISSN 0002-7863; ISSN JACSA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500* -- Photochemistry
AZINES
CHEMISTRY
COMPLEXES
DATA
EXPERIMENTAL DATA
HETEROCYCLIC COMPOUNDS
INFORMATION
LIGANDS
LUMINESCENCE
MEDIUM TEMPERATURE
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHOTOCHEMISTRY
PYRIDINES
RHENIUM COMPLEXES
TRANSITION ELEMENT COMPLEXES