Department of Chemistry , Indian Institute of Technology Patna , Patna 801106 , Bihar , India.
Inorg Chem. 2019 Feb 4;58(3):2042-2053. doi: 10.1021/acs.inorgchem.8b03058. Epub 2019 Jan 11.
The synthesis and characterization of a new pyrazine-based ditopic organoplatinum(II) complex having a bite angle of 180° is reported. The facile and efficient syntheses are described of three discrete neutral Fe(II)/Pt(II) heterobimetallic SCCs with Pt(II) acceptor clips of different binding angles, 0, 120, and 180°. These new SCCs were characterized by multinuclear NMR and mass spectrometry. Electrochemical response of these ferrocene containing self-assembled ensembles was studied using cyclic voltammetry. The diplatinum acceptor organometallic clips significantly quench the fluorescence of highly emitting carbon quantum dots (CD), while the self-assembled macrocycles tend to nullify the quenching effect of the organometallic clips. Interestingly, the inefficient quenching of CD fluorescence by these SCCs was found to be directly related to the angular disposition of the binding sites in the Pt(II) based organometallic clips.
报道了一种新的基于吡嗪的双齿有机铂（II）配合物的合成与表征，其结合角为 180°。描述了三种离散的中性 Fe(II)/Pt(II)杂金属 SCC 的简便高效合成，其中 Pt(II)受体夹具有不同的结合角，分别为 0、120 和 180°。这些新的 SCC 用多核 NMR 和质谱法进行了表征。使用循环伏安法研究了这些含二茂铁的自组装聚集体的电化学响应。二价铂接受体有机金属夹显著猝灭高发射碳量子点（CD）的荧光，而自组装大环往往使有机金属夹的猝灭效应无效。有趣的是，发现这些 SCC 对 CD 荧光的低效猝灭与 Pt(II)基有机金属夹中结合位点的角分布直接相关。
