Construction of Type III-C Rotaxane-Branched Dendrimers and Their Anion-Induced Dimension Modulation Feature
作者:Xu-Qing Wang、Wei-Jian Li、Wei Wang、Jin Wen、Ying Zhang、Hongwei Tan、Hai-Bo Yang
DOI:10.1021/jacs.9b06739
日期:2019.9.4
the wheel components of the rotaxane units are located on the branches as well as at the branching points, making them excellent candidates to mimic the amplified collective molecular motions. Thus, taking advantage of the urea moiety inserted into the axle components of the rotaxane units as the binding sites, the addition or removal of acetate anion as stimulus endows the individual rotaxane unit switchable
we present the successful fab-rication of a family of new rotaxane-branched dendrimers containing up to twenty-one platinum atoms and forty-two photosensitizer moieties through an efficient and controllable divergent approach. Notably, the photosensitization efficiencies of these rotaxane-branched dendrimers gradually increased with the increase of dendrimer generation. For example, third-generation
Fluorescent Cross-Linked Supramolecular Polymer Constructed by Orthogonal Self-Assembly of Metal-Ligand Coordination and Host-Guest Interaction
作者:Xiaomin Qian、Weitao Gong、Xiaopeng Li、Le Fang、Xiaojun Kuang、Guiling Ning
DOI:10.1002/chem.201600561
日期:2016.5.10
consists of four terpyridine groups as the binding sites with zinc(II) ion and a copillar[5]arene incorporated in the center as a spacer to interact with guest molecule was designed and synthesized. Due to the 120 ° angle of the rigid aromatic segment, a cross‐linked dimeric hexagonal supramolecular polymer was therefore generated as the result of the orthogonal self‐assembly of metal–ligand coordination
porphyrin-pillar[5]arene hostcompound ZnPor-P5 was designed and prepared for the first time. A 1 : 1 supramolecular complex (ZnPor-P5)·C4 was formed with the neutral guest 1,4-bis(imidazol-1-yl)butane (C4) depending on the cooperative interactions between the coordination of the zinc ion locating at the center of the porphyrin moiety and the inclusion complexation of the pillar[5]arene cavity with the guest molecule
One-pot synthesis of pillar[n]arenes catalyzed by a minimum amount of TfOH and a solution-phase mechanistic study
作者:Kai Wang、Li-Li Tan、Dai-Xiong Chen、Nan Song、Guan Xi、Sean Xiao-An Zhang、Chunju Li、Ying-Wei Yang
DOI:10.1039/c2ob26635k
日期:——
A practical and effective trifluoromethanesulfonicacid (TfOH)-catalyzed cyclooligomerization strategy was developed for the synthesis of functionalized pillar[n]arenes and copillar[5]arenes from 1,4-dialkoxybenzenes with paraformaldehyde under mild reaction conditions, and the reaction mechanism of solution-phase catalytic synthesis of pillararenes was investigated by room-temperature X-band ESR spectroscopy
实用有效 三氟甲磺酸 (三氟乙酸)在温和的反应条件下,开发了由1,4-二烷氧基苯与多聚甲醛合成官能化的柱[ n ]芳烃和copillar [5]芳烃的)催化环寡聚反应策略,并研究了溶液相催化合成柱芳烃的反应机理通过室温X波段ESR光谱,质谱,NMR和对照实验,表明最初的自由基过程以及随后的偶联和闭环阶段的Friedel-Crafts烷基化过程。