pH-Controlled Reversible Formation of a Supramolecular Hyperbranched Polymer Showing Fluorescence Switching (pages 4922–4930)
Bingran Yu, Dr. Baoyan Wang, Shuwen Guo, Qian Zhang, Xiaorui Zheng, Haitao Lei, Prof. Dr. Weisheng Liu, Prof. Dr. Weifeng Bu, Yun Zhang and Dr. Xin Chen
Version of Record online: 18 FEB 2013 | DOI: 10.1002/chem.201204315
Branching out: A supramolecular hyperbranched polymer, TFA-1, has been reversibly fabricated by successively adding acid and base to a conjugated AB2 monomer (1) in CH2Cl2 (see scheme). The driving force behind its assembly is based on acid–base-controllable host–guest recognition between the dibenzocrown-8 moiety and dialkylammonium ion centres. This reversible process is associated with the establishment of π–π stacking interactions between the conjugated cores in solution, which affects the observed fluorescence intensity.