Amphiphilic Nanocapsules Entangled with Organometallic Coordination Polymers for Controlled Cargo Release

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• 作者：Guodong Liang ; Huan Ni ; Suping Bao ; Fangming Zhu ; Haiyang Gao ; Qing Wu ; Ben Zhong Tang
• 刊名：Langmuir
• 出版年：2014
• 出版时间：June 3, 2014
• 年：2014
• 卷：30
• 期：21
• 页码：6294-6301
• 全文大小：402K
• 年卷期：v.30,no.21(June 3, 2014)
• ISSN：1520-5827

文摘

A class of new amphiphilic nanocapsules entangled with organometallic coordination polymers has been developed for the first time. Poly(2-(N,N-dimethyl amino)ethyl methacrylate)-b-polystyrene capped with 尾-cyclodextrin (尾-CD) (CD-PDMAEMA-b-PS) is first synthesized using sequent RAFT polymerization of styrene and 2-(N,N-dimethyl amino)ethyl methacrylate with xanthate modified 尾-CD as chain transfer agent. The end group of 尾-CD is allowed to include 4,4鈥?bipyridine through host鈥揼uest inclusion to yield PDMAEMA-b-PS terminated with an inclusion complex of 尾-CD and bipyridine (bpy-PDMAEMA-b-PS), which is then used as surfactant to prepare emulsion droplets in toluene/water mixture. Upon addition of Ni(II), bipyridine coordinates with Ni(II) to form coordination polymers in the periphery of emulsion droplets, affording amphiphilic capsules entangled with organometallic coordination polymers, as confirmed by GPC, ¹H NMR, SEM, TEM, DLS, and so on. The organometallic coordination polymer capsules are capable of encapsulating organic cargoes. Interestingly, encapsulated cargoes can be extracted from the capsules without damaging the capsules. Such capsules are potential candidates for encapsulating and controlled release of organic cargoes.