title: Heteropolynuclear complexes of 3,5-dimethylpyrazolate [Pt2M4(Me2pz)8] (M = Ag, Cu). Highly luminescent character of the triplet excited state based on mixed-metal cores.
abstract: The platinum dimer and heteropolynuclear platinum complexes of 3,5-dimethylpyrazolate, [Pt2M4(mu-Me2pz)8] [M = H (1), Ag (2), Cu (3)], were synthesized and structurally characterized. They exhibit yellow, sky-blue, and orange luminescence, respectively, in the solid state. The absorption bands of 2 and 3 are mainly assigned to the combination of the metal-metal-to-ligand charge-transfer and [Pt2 --> Pt2M4] transitions by the time-dependent density functional theory (DFT) method. DFT calculations also indicate that the emissive states of 2 and 3 are 3[Pt2 --> Pt2Ag4] and 3[Cu(d) --> Pt2Cu4], respectively.
authors.affiliation: Department of Applied Chemistry, Faculty of Engineering, Nagasaki University, Nagasaki, Japan. kumks@nagasaki-u.ac.jp
authors.forename: Keisuke
authors.initials: K
authors.lastname: Umakoshi
authors.forename: Takashi
authors.initials: T
authors.lastname: Kojima
authors.forename: Keizo
authors.initials: K
authors.lastname: Saito
authors.forename: Seiji
authors.initials: S
authors.lastname: Akatsu
authors.forename: Masayoshi
authors.initials: M
authors.lastname: Onishi
authors.forename: Shoji
authors.initials: S
authors.lastname: Ishizaka
authors.forename: Noboru
authors.initials: N
authors.lastname: Kitamura
authors.forename: Yoshihide
authors.initials: Y
authors.lastname: Nakao
authors.forename: Shigeyoshi
authors.initials: S
authors.lastname: Sakaki
authors.forename: Yoshiki
authors.initials: Y
authors.lastname: Ozawa