Assembly-enhanced triplet-triplet annihilation upconversion in the aggregation formed by Schiff-base Pt(II) complex grafting-permethyl-β-CD and 9, 10-diphenylanthracence dimer
Assembly-enhanced triplet-triplet annihilation upconversion in the aggregation formed by Schiff-base Pt(II) complex grafting-permethyl-β-CD and 9, 10-diphenylanthracence dimer
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席夫碱 Pt(II) 配合物接枝全甲基-β-CD 和 9, 10-二苯基蒽二聚体形成的聚集体中组装增强的三重态-三重态湮灭上转换
DOI：
10.1016/j.cclet.2019.09.009
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发表时间：
2019-11-01
影响因子：
9.1
通讯作者：
Yang, Cheng
中科院分区：
文献类型：
--
作者：
Lai, Hongxia;Zhao, Ting;Yang, Cheng
以全甲基-β-环糊精（PMCD）为受体，席夫碱铂（II）配合物（Pt-2）为敏化剂，合成了一种水溶性的三重态敏化剂，研究了超分子络合组装对水中三重态-三重态湮灭上转换发光的影响.合成了9，10-二苯基蒽羧酸酯（A-1）及其二聚体（A-2），其中两个DPA羧酸酯与一个烷基链共价连接，作为三重态受体，也可作为PMCD的客体分子。A-1和A-2显示出与PMCD的高亲和力，并且A-2由于A-2中蒽核的疏水作用和π-π堆积而易于在水中聚集并形成微米尺寸的组装体。TTA-UC的效率被证明是由主体-客体络合Pt-2与A-2和受体A-2的自聚集的协同效应，这促进了供体和受体之间的能量转移和能量融合。(C)2019中国化学会、中国医学科学院药物研究所。Elsevier B. V.出版，保留所有权利。
Water-soluble triplet sensitizer with permethyl-beta-cyclodextrin (PMCD) grafting on a Schiff-base Pt(II) complex (Pt-2), in which PMCD unit serves as a host for binding the acceptors and the Schiff-base Pt(II) complex serves as a triplet sensitizer, was synthesized to investigate the effect of supramolecular complexation and assembly on the triplet-triplet annihilation upconversion emission in water. 9, 10-Diphenylanthracence (DPA) carboxylate (A-1) and its dimer (A-2) in which two DPA carboxylate were covalently linked with an alkyl chain were synthesized as triplet acceptors which also play a role of guest molecules for PMCD. A-1 and A-2 showed high affinity with PMCD, and A-2 can readily aggregate in water and form micron sized assemblies due to the hydrophobic effect and pi-pi stacking of anthracene core in A-2. The efficiency of TTA-UC was demonstrated to be enhanced by a synergistic effect of host-guest complexation of Pt-2 with A-2 and the self-aggregation of the acceptor A-2, which facilitated the energy transfer and energy fusion among donor and acceptor. (C) 2019 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.