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.
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.
Umakoshi
Keisuke
K
Department of Applied Chemistry, Faculty of Engineering, Nagasaki University, Nagasaki, Japan. kumks@nagasaki-u.ac.jp
Kojima
Takashi
T
Saito
Keizo
K
Akatsu
Seiji
S
Onishi
Masayoshi
M
Ishizaka
Shoji
S
Kitamura
Noboru
N
Nakao
Yoshihide
Y
Sakaki
Shigeyoshi
S
Ozawa
Yoshiki
Y