Preparation and characterization of optically functional hollow sphere hybrid materials by surface-initiated RATRP and "click" chemistry  

作　　者：Xin-Hu Lv Li-Ping Wang Guang Li Xue-Xi Gao Pan-Pan Pan Li-Mei Zhang 

机构地区：[1]College of Materials Science and Engineering,Liaocheng University [2]School of Physical Science and Information Technology,Liaocheng University

出　　处：《Chinese Chemical Letters》2013年第4期335-337,共3页中国化学快报（英文版）

基　　金：the financial support by the Natural Science Foundation of China(No.21203085);Promotive Research Fund for Young and Middle-aged Scientists of Shandong Province(doctor fund)(Nos.BS2011CL011 and BS2012CL009)

摘　　要：The random copolymers grafted onto the surfaces of SiO2 hollow sphere via reverse atom transfer radical polymerization （RATRP） and ＂click＂ chemistry were investigated. A sufficient amount of peroxides, as initiating moieties, were introduced onto the surface of hollow spheres. Then styrene and 4-vinylbenzyl azide were polymerized via surface-initiated reverse atom transfer radical polymerization （SI-RATRP） using the peroxide group modified hollow sphere as initiator, resulting in hollow spheres （HS） with grafted polystyrene-co-poly（4-vinylbenzyl azide） copolymer brushes as （HS-g-PS-co-PVBA） intermedi- ate material. Subsequently, N-propargyl-carbazole （PC） was covalently bonded to HS-g-PS-co-PVBA by the ＂click＂ reaction, resulting in the HS-g-PS-co-PVBPC hybrid material. The excitation spectrum is dominated by a broad band from 350 nm to 400 nm with the maximum peak at 362 nm, attributed to the characteristic absorption of the carbazole grouD of HS-g-PS-co-PVBPC hybrid material.The random copolymers grafted onto the surfaces of SiO2 hollow sphere via reverse atom transfer radical polymerization （RATRP） and ＂click＂ chemistry were investigated. A sufficient amount of peroxides, as initiating moieties, were introduced onto the surface of hollow spheres. Then styrene and 4-vinylbenzyl azide were polymerized via surface-initiated reverse atom transfer radical polymerization （SI-RATRP） using the peroxide group modified hollow sphere as initiator, resulting in hollow spheres （HS） with grafted polystyrene-co-poly（4-vinylbenzyl azide） copolymer brushes as （HS-g-PS-co-PVBA） intermedi- ate material. Subsequently, N-propargyl-carbazole （PC） was covalently bonded to HS-g-PS-co-PVBA by the ＂click＂ reaction, resulting in the HS-g-PS-co-PVBPC hybrid material. The excitation spectrum is dominated by a broad band from 350 nm to 400 nm with the maximum peak at 362 nm, attributed to the characteristic absorption of the carbazole grouD of HS-g-PS-co-PVBPC hybrid material.

关 键 词：Hollow sphereRATRP＂Click＂ chemistry4-Vinylbenzyl azide 

分 类 号：TB33[一般工业技术—材料科学与工程]