Gong Zhong-Liang, Zhong Yu-Wu
Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Science , 2 Bei Yi Jie, Zhong Guan Cun, Haidian District, Beijing 100190, China.
Inorg Chem. 2016 Oct 17;55(20):10143-10151. doi: 10.1021/acs.inorgchem.6b01059. Epub 2016 Sep 28.
A simple [Pt(N^C^N)Cl] complex functionalized with an amide group was prepared, and its absorption and emission properties were examined in different solvents in response to various anions. On the one hand, in the presence of HPO, the solution of the complex shows distinct color changes in CHCN, together with a ratiometric emission change from a green emission band at 537 nm to a deep red emission band at 680 nm. On the other hand, two-step spectral changes were observed in response to HPO in CHCl, with the green emission being attenuated first followed by the appearance of enhanced and yellow-green emissions at a lower-energy region. These recognition processes are highly selective for HPO against other common anions including F, Cl, Br, I, OAc, NO, and HSO. In addition, the platinum complex displays multistage emission polymorphism in mixed CHCN/HO solvent of various ratios. The hydrogen-bonding interaction between HPO and the amide unit was confirmed by NMR analysis. In the solid state, this platinum complex emits red light. However, the composite material of the platinum complex with HPO shows purely monomeric yellow emissions. The solid-state materials were further analyzed by single-crystal X-ray and Fourier-transform IR analysis. These studies suggest that this simple platinum complex is useful for the selective recognition of HPO and as solid-state emitting materials with tunable emission colors.
制备了一种用酰胺基团功能化的简单[Pt(N^C^N)Cl]配合物，并在不同溶剂中研究了其对各种阴离子响应时的吸收和发射特性。一方面，在HPO存在下，该配合物在CHCN中的溶液显示出明显的颜色变化，同时伴随着从537 nm处的绿色发射带到680 nm处的深红色发射带的比率发射变化。另一方面，在CHCl中观察到对HPO响应的两步光谱变化，首先绿色发射减弱，随后在较低能量区域出现增强的黄绿色发射。这些识别过程对HPO具有高度选择性，可区分其他常见阴离子，包括F、Cl、Br、I、OAc、NO和HSO。此外，铂配合物在不同比例的混合CHCN/H₂O溶剂中表现出多级发射多态性。通过NMR分析证实了HPO与酰胺单元之间的氢键相互作用。在固态下，这种铂配合物发出红光。然而，铂配合物与HPO的复合材料显示出纯单体黄色发射。通过单晶X射线和傅里叶变换红外分析对固态材料进行了进一步分析。这些研究表明，这种简单的铂配合物可用于选择性识别HPO，并作为具有可调发射颜色的固态发光材料。
