表面活性剂对以羧基为端基的芳基苄醚树枝配体取代酞菁锌(Ⅱ)配合物聚集行为的影响  

The effect of surfactants on the aggregation behavior of phthalocyanine zinc(Ⅱ) bearing poly(aryl benzyl ether)dendritic substituents with carboxylic terminal

作　　者：陈婉玲[1] 彭亦如[1] 贺丹丹[1] 马冬冬[1] 张甜甜[1] 魏珍珍[1] 吴雪蓉[1] 

机构地区：[1]福建师范大学化学与化工学院,福建省高分子材料重点实验室,福建福州350007

出　　处：《功能材料》2013年第24期3581-3586,共6页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(21274021;20604007);卫生部科学研究基金资助项目(WKJ2008-2-61);福建省自然科学基金资助项目(2011J01029);福建省大学生创新性实验计划资助项目(Sjx(y-2012004))

摘　　要：通过紫外光谱法和荧光光谱法比较,研究了阳离子表面活性剂十六烷基三甲基溴化铵（CTAB）对0~2代以羧基为端基的芳基苄醚树枝配体取代酞菁锌（Ⅱ）配合物（ZnPc（COOH）4、G1-ZnPc（COOH）8和G2-ZnPc （COOH ）16）聚集行为的影响。ZnPc （COOH）4、G1-ZnPc（COOH）8和 G2-ZnPc（COOH）16在水溶液中主要以二聚体形式存在。加入 CTAB 后, ZnPc （COOH ）4、G1-ZnPc （COOH ）8和 G2-ZnPc （COOH）16的单体吸收峰强度均增强,二聚体吸收峰强度均逐渐减弱；荧光光谱均明显增强,这表明 CTAB对树枝酞菁体系具有明显的解聚作用。这是因为 Zn-Pc （COOH ）4、G1-ZnPc （COOH ）8和 G2-ZnPc （COOH）16表面带负电荷的羧基与带正电荷的 CTAB通过静电作用形成纳米胶束,破坏了羧基酞菁聚集体之间的氢键。通过Zetasize粒度分析仪研究了不同浓度的CTAB与羧基酞菁形成纳米胶束的粒径分布情况,平均粒径范围约在5~30 nm,并随着 CTAB 浓度的增加,纳米胶束的平均粒径增大；随着树枝代数增加,纳米胶束的平均粒径逐渐减小。因此,阳离子表面活性剂CTAB可以有效抑制酞菁在水溶液中的聚集行为,在开展酞菁的光化学和物理研究方面具有很好的应用前景。The interaction between the phthalocyanine zinc（Ⅱ）bearing poly（aryl benzyl ether）dendritic substit-uents with carboxylic terminal （ZnPc（COOH）4 ,G1-ZnPc（COOH）8 and G2-ZnPc（COOH）16 ）and cationic sur-factants（cetyltrimethyl ammonium bromide（CTAB））were studied by fluorescence and UV-Vis spectroscopic methods.ZnPc（COOH）4 ,G1-ZnPc（COOH）8 and G2-ZnPc（COOH）16 mainly existed as a dimer at 625 nm in aqueous media,but they mainly exhibited as monomers at 685 nm with addition of CTAB.As the concentra-tion of CTAB increased,the intensity of the monomeric absorption peak increased,while that of the dimer peaks decreased gradually.Meanwhile,the fluorescence intensity of ZnPc（COOH）4 ,G1-ZnPc（COOH）8 and G2-ZnPc（COOH）16 also markedly enhanced.Therefore,the aggregation behavior of these water-soluble den-dritic phthalocyanines could be disrupted effectively by addition of CTAB.The electrostatic interaction between the positive charges of the CTAB and negative charges of the dendritic phthalocyanine leaded to dis-aggregation of the dendritic phthalocyanine.The nanoparticles were formed by encapsulation of water-soluble dendritic phthalocyanines into the CTAB micelles.The diameters of nanoparticles were studied by Zetasize particle size analyzer.The average sizes of nano-particles were in the range of 5-30 nm.The size of nano-particles increased with the increasing the concentration of CTAB while decreasing with increasing of the dendritic generation. This would provide a useful method for solving the aggregation problem associated with phthalocyanine,and showed potential application in various photophysical and chemical applications.

关 键 词：酞菁锌(Ⅱ) 树枝配体 表面活性剂 聚合物纳米胶束 

分 类 号：O614[理学—无机化学]