Synthesis, Characterization, and Photophysical Properties of Three Platinum(II) Complexes Bearing Fluorescent Analogues of the Di-2-pyridylmethane Ligand
作者:Justin J. Wilson、Juliana Fedoce Lopes、Stephen J. Lippard
DOI:10.1021/ic100411p
日期:2010.6.7
1 thermally decomposes at 60 °C to form several unidentified products. Compound 2 is thermally stable even in the presence of dioxygen and water but upon light exposure decomposes to form a new platinum(II) species with a 195Pt NMR shift of −2177 ppm. Compound 3 reacts both thermally and photochemically in the presence of dioxygen and trace amounts of water to form both 4-amino-7-nitro-2,1,3-benzoxadiazole
通式 [RNHCH(py) 2 ] 的三个新配体(py = 吡啶;R = 甲苯磺酰基,Ts-dpm;R = 丹磺酰基,Ds-dpm;R = 7-硝基-1,2,3-苯并恶二唑,NBD -dpm) 已被合成和表征。这些配体与顺式-[Pt(DMSO) 2 Cl 2 ](DMSO = 二甲基亚砜)在甲醇中的反应得到 [Pt(Ts-dpm)Cl 2 ] ( 1 ), [Pt(Ds-dpm)Cl 2 ] ( 2 ) 和 [Pt(NBD-dpm)Cl 2 ] ( 3)。这些配合物的晶体结构揭示了配体与具有非平面螯合环的 Pt 中心的双齿配位。由于配体的次甲基碳原子上有不等价的取代基,三种配合物中存在不同的外型和内型异构体。X 射线分析表明1以内构象结晶,2 以外构象结晶,3以两种构象异构体的混合物形式结晶。的1 H NMR和195复合物的 Pt NMR 谱显示了两组独立的信号,对应于化学上不等价的外型和内型构象异构体。外构象异构体通过