title: Synthesis, characterization, photophysics, and anion binding properties of platinum(ii) acetylide complexes with urea group.
abstract: A new class of platinum(ii) acetylide complexes with urea group, [Pt((t)Bu3tpy)(C[triple bond, length as m-dash]CC6H4-4-NHC(O)NHC6H4-4-R)](OTf) ((t)Bu3tpy = 4,4',4''-tri-tert-butyl-2,2':6',2''-terpyridine; R = H (), Cl (), CF3 (), and NO2 ()), has been synthesized and characterized. The crystal structures of , ·DMF·THF, ·CH3CN, and ·CH3CN have been determined by X-ray diffraction. Upon excitation at λ > 380 nm, the solid samples of complexes show orange light at 298 K. The anion binding properties of complexes have been studied by UV-vis titration experiments in CH3CN and DMSO. In general, the log K values of with the same anion in CH3CN depend on the substituent R on the acetylide ligand of and follow this order: R = NO2 () > CF3 () > Cl () > H (). For the same complex with different anions, the log K values are in the following order: F(-) > OAc(-) > Cl(-) > Br(-) ≈ HSO4(-) ≈ NO3(-) > I(-), which is in accordance with the decrease in the basicity of anions. Complex with NO2 group shows a dramatic colour change towards F(-) in DMSO, allowing the naked eye detection of F(-).
authors: MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China. zhaoxy@mail.sysu.edu.cn.
authors: Zhi-Hui
authors: ZH
authors: Zhang
authors: Jiewei
authors: J
authors: Liu
authors: Li-Qi
authors: LQ
authors: Wan
authors: Fang-Ru
authors: FR
authors: Jiang
authors: Chi-Keung
authors: CK
authors: Lam
authors: Bao-Hui
authors: BH
authors: Ye
authors: Zhengping
authors: Z
authors: Qiao
authors: Hsiu-Yi
authors: HY
authors: Chao
mesh_terms: D000838:Anions; D018360:Crystallography, X-Ray; D004121:Dimethyl Sulfoxide / Q000737:chemistry; D015195:Drug Design; D005461:Fluorine / Q000737:chemistry; D008024:Ligands; D008968:Molecular Conformation; D015394:Molecular Structure; D010984:Platinum / Q000737:chemistry*; D011485:Protein Binding; D012997:Solvents / Q000737:chemistry; D013696:Temperature; D014466:Ultraviolet Rays; D014508:Urea / Q000737:chemistry*
chemical_list: D000838:Anions; D008024:Ligands; D012997:Solvents; D005461:Fluorine; D010984:Platinum; D014508:Urea; D004121:Dimethyl Sulfoxide