Da-Shuai Zhang

Synthesis and Optoelectronic Properties of a Pt(II) Complex with 2-Pyridin-2-Yl-1,3-Thiazole-4-Carboxylic Acid

A carboxyl functionalized Pt(II) complex PtC9H6N2O2SCl2 (I) has been synthesized by the coordination reaction of K2PtCl4 with 2-pyridin-2-yl-1,3-thiazole-4-carboxylic acid. The absorption property and photosensitizing performance of I has been studied. Through assembling the dye-sensitized solar cells (DSSCs) based on complex I, a weak solar-energy-to-electricity conversion is presented. Additionally, when complex I was solved in DMF solution, a novel complex PtC9H7N2O3SCl (II) could be obtained. The structure of II has been confirmed by the single-crystal X-ray diffraction (CIF file CCDC no. 1538911).

Solvent-tuned charge-transfer properties of chiral Pt(II) complex and TCNQ˙− anion adducts

A new pair of adducts comprising one chiral Pt(II) complex cation, [Pt((−)-L1)(Dmpi)]+ ((−)-1) or [Pt((+)-L1)(Dmpi)]+ ((+)-1) [(−)-L1 = (−)-4,5-pinene-6′-phenyl-2,2′-bipyridine, (+)-L1 = (+)-4,5-pinene-6′-phenyl-2,2′-bipyridine, Dmpi = 2,6-dimethylphenylisocyanide], together with one TCNQ˙− anion have been obtained, and the structures have been confirmed via single-crystal X-ray crystallography and infrared (IR) spectroscopy. The chiral Pt(II) cation and TCNQ˙− anion are dissociated in MeOH solution, while charge transfer adducts are formed in H2O solution, leading to perturbation of the electronic structure and alteration of the chiral environment, as evidenced by the differences in the UV-vis absorption and electronic circular dichroism spectra. The solvent-tuned charge-transfer properties also have been validated through emission and resonance light scattering spectra. The interesting findings may have potential applications in the development of black absorbers and wide band gap semiconductors.