摘要
以3-(三甲氧基甲硅烷基)丙基甲基丙烯酸酯(MPS)修饰的二羟基硅酞菁(SiPc(OH)_2)为荧光单体(SiPc,OSi(C_9H_(17)O_4)_2)、过硫酸钾(KPS)为引发剂、十二烷基硫酸钠(SDS)为乳化剂,采用原位共聚法合成了一种新型单分散聚苯乙烯荧光微球(P(St-co-SiPc))。采用扫描电镜、傅里叶红外光谱对微球的形貌与组成进行了分析与表征,并对合成条件进行了优化。研究了荧光单体与苯乙烯的用量、反应温度对微球形貌与荧光性能的影响。在此基础上,利用紫外光谱进一步研究了该微球的光敏特性。结果表明,柔性不饱和侧链修饰的硅酞菁单体与苯乙烯的相容性良好,合成的荧光微球具有优异的稳定性与光学性能。
By using axially di-substituted silicon(IV)phthalocyanine(SiPc)as fluorescent monomer,which was synthesized through the reaction of silicon(IV)phthalocyanine dihydroxide with 3-(trimethoxysilyl)propyl methacrylate,potassium persulfate as initiator,and sodium dodecyl sulfate as emulsifier,a novel monodispersed polystyrene fluorescent microsphere(hereafter called as P(St-co-SiPc))was prepared via in-situ copolymerization.The surface morphology and composition of the as-prepared microspheres were characterized by scanning electron microscope(SEM)and Fourier transform infrared spectroscopy(FT-IR).The optimized synthetic conditions had also been explored.It was found that both the size and monodispersity of P(St-co-SiPc)increased with the temperature increasing(from 60℃to 70℃).When the experimental temperature reached up to 75℃,the diameter of P(St-co-SiPc)started to decrease,followed by broadening of the particle size distribution.The same trend was also observed with the fluorescence emission of P(St-co-SiPc).In the case of a given amount of one monomer,whatever monomer(styrene or SiPc)was used,the amount of another monomer had the similar influence on the surface morphology of the microsphere.The size of the microspheres increased with increasing amount of the monomer used.The monodispersity and fluorescence intensity of P(St-co-SiPc)were closed to a best value when the amount of the monomer was in the range of 6~8 mL for styrene and 5~15 mg for SiPc.By using diphenylanthracene(DPA)as a singlet oxygen indicator,the photosensitivity of P(St-co-SiPc)was evaluated by UV-Vis absorption spectroscopy.As a result,these microspheres exhibited very good photosensitivity.Upon excitation with 640 nm laser,the UV-Vis absorption intensity of P(St-co-SiPc)increased quickly in the presence of DPA.On the other hand,if no irradiation was applied to the above system,its absorption intensity was found to keep unchanged.These findings would have important reference value for controllable etching.
作者
刘丹丹
汪雨
郭健
张洁洁
关建宁
韩国志
LIU Dan-dan;WANG Yu;GUO Jian;ZHANG Jie-jie;GUAN Jian-ning;HAN Guo-zhi(School of Chemistry and Molecular Engineering,Nanjing Tech University,Nanjing 211800,China)
出处
《功能高分子学报》
CAS
CSCD
北大核心
2018年第2期167-174,共8页
Journal of Functional Polymers
基金
东南大学生物电子学国家重点实验室开放课题(20170118)
关键词
硅酞菁
聚苯乙烯
荧光微球
原位共聚
单线态氧
phthalocyanine
polystyrene
fluorescent microspheres
in-situ copolymerization
singlet oxygen
作者简介
刘丹丹(1990-),女,山东济宁人,硕士生,研究方向为荧光微球的合成与应用。E-mail:lddx21114006@163.com;通信联系人:韩国志,E-mail:han@njtech.edu.cn
