Complementary Lock‐and‐Key Ligand Binding of a Triplet Transmitter to a Nanocrystal Photosensitizer
作者:Xin Li、Alexander Fast、Zhiyuan Huang、Dmitry A. Fishman、Ming Lee Tang
DOI:10.1002/anie.201701929
日期:2017.5.8
the difficulty in comprehensively characterizing nanocrystal (NC) surfaces, clear guidance for ligand design is lacking. In this work, a series of bidentate bis(pyridine) anthracene isomers (2,3‐PyAn, 3,3‐PyAn, 2,2‐PyAn) that differ in their binding geometries were designed to find the best complementary fit to the NC surface. The efficiency of triplet energy transfer (TET) from the CdSe NC donor to
由于难以全面表征纳米晶体(NC)表面,因此缺乏明确的配体设计指导。在这项工作中,设计了一系列结合几何形状不同的二齿双(吡啶)蒽异构体(2,3-PyAn,3,3-PyAn,2,2-PyAn),以找到与NC的最佳互补配合。表面。由这些异构体介导的从CdSe NC供体到二苯基蒽(DPA)受体的三重态能量转移(TET)的效率被用作轨道重叠和配体结合效率的代理。2,3-PyAn,分子内N–N距离为8.2Å,提供了与CdSe NCs表面的最佳匹配。当用作光子上转换的发射器时,2,3-PyAn的最高上转换量子产率(QY)为12.1±1.3%,其次是3,3-PyAn和2,2-PyAn。