title: Optical and ODMR Studies of Luminescent Halo(dimethylphenylphosphine)gold(I) Crystals.
abstract: Crystals of {(Me(2)PhP)AuX}(n) (Me = methyl; Ph = phenyl; X = Cl, Br, I; n = 2, 3) show emission from two excited states. Both states are assigned a triplet multiplicity, on the basis of their lifetimes and zero-field splittings. The structured, higher energy emission originates at approximately 360 nm and has the greater relative intensity at low temperatures. It is assigned as intraligand phosphorescence from a phenyl-localized (3)pipi state. The unstructured, lower energy emission has a peak wavelength that varies in the range 630-730 nm. It is assigned as phosphorescence from the triplet state due to the gold-based sigma(p) <-- sigma(s,d) excitation. The corresponding singlet state is observed at 290-310 nm. The results of SCF-Xalpha-SW calculations on the model complexes H(3)PAuX and (H(3)PAuX)(2) are also presented.
authors.affiliation: Department of Chemistry, University of California, Davis, California 95616.
authors.forename: Brian
authors.initials: B
authors.lastname: Weissbart
authors.forename: Dawn V.
authors.initials: DV
authors.lastname: Toronto
authors.forename: Alan L.
authors.initials: AL
authors.lastname: Balch
authors.forename: Dino S.
authors.initials: DS
authors.lastname: Tinti