[Chem.Eur.J.]Host–Guest Binding-Site-Tunable Self-Assembly of StimuliResponsive Supramolecular Polymers
作者：Hao Yao, Miao Qi, Yuyang Liu, and Wei Tian*[a]
關鍵字：controllable self-assembly,binding-site-tunable self-assembly,SSP2 self-assemblies
論文來源：期刊
具體來源：Chem. Eur. J. 2016, 22, 8508-8519
發表時間：2016年
Despite the remarkable progress made in controllable self-assembly of stimuli-responsive supramolecular polymers (SSPs), a basic issue that has not been consideration to date is the essential binding site. The noncovalent binding sites, which connect the building blocks and endow supramolecular polymers with their ability to respond to stimuli, are expected to strongly affect the self-assembly of SSPs. Herein, the design and synthesis of a dual-stimuli thermo- and photoresponsive Y-shaped supramolecular polymer (SSP2) with two adjacent β-cyclodextrin/azobenzene (β-CD/Azo) binding sites, and another SSP (SSP1) with similar building blocks, but only one β-CD/Azo binding site as a control, are described. Upon gradually increasing the polymer solution temperature or irradiating with UV light, SSP2 self-assemblies with a higher binding-site distribution density; exhibits a flower-like morphology, smaller size, and more stable dynamic aggregation process; and greater controllability for drug-release behavior than those observed with SSP1 self-assemblies. The host–guest binding-site-tunable self-assembly was attributed to the positive cooperativity generated among adjacent binding sites on the surfaces of SSP2 self-assemblies. This work is beneficial for precisely controlling the structural parameters and controlled release function of SSP self-assemblies.
全文鏈接：http://onlinelibrary.wiley.com/doi/10.1002/chem.201601142/full;jsessionid=85FB9608ABB60A
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