水溶液中P(AM-co-PEBA)聚合物对Tb^3＋离子荧光增强作用  

Luminescence Enhancement of Tb^(3+) Ion in Hydrophobically Associating P(AM-co-PEBA) Aqueous Solution

作　　者：李振泉[1] 张玉玺[2] 曹绪龙[1] 宋新旺[1] 王胜蓝[2] 王尔鑑[2] 吴飞鹏[2] 

机构地区：[1]中石化胜利油田分公司地质科学研究院,东营257015 [2]中国科学院理化技术研究所,北京100190

出　　处：《化学学报》2009年第11期1243-1246,共4页Acta Chimica Sinica

摘　　要：考察了Tb3+离子在模板法合成的疏水缔合水溶性聚合物聚丙烯酰胺/4-(ω-丙烯酰氧乙氧基)苯甲酸(P(AM-co-PEBA))溶液中的荧光增强行为.在溶液中P(AM-co-PEBA)通过羧基的络合作用及疏水缔合作用,改变了Tb3+离子所处微环境,降低了Tb3+离子络合水的个数,提高了Tb3+离子荧光强度.聚合物中PEBA含量增加或PEBA以微嵌段结构存在,这一微环境效应得到增强.另一方面,聚合物P(AM-co-PEBA)分子内具有紫外光捕获基团,可通过"天线效应"与Tb3+离子进行能量传递,进一步提高了Tb3+离子的荧光强度.The fluorescence enhancement of Tb^3＋ ion in the aqueous solution of acrylamide （AM） and 4-（09-propenoyloxyethoxy）benzoic acid （PEBA） copolymers synthesized by a template copolymerization process was investigated. The complex of the carboxyl and the hydrophobic association changed the micro-environment of Tb^3＋ ion, reduced the number of coordinated water molecules to Tb^3＋ ion, so the fluorescence of Tb^3＋ ion was enhanced. The content of PEBA was increased or the PEBA in the copolymer existed as micro-blocks, and the micro-environment effect was enhanced. Moreover the copolymer could transfer energy from the light-harvesting phenyl subunit to the Tb^3＋ ion, which prominently enhanced the fluorescence intensity of Tb^3＋ ion （antenna effect）.

关 键 词：模板聚合 疏水缔合 Tb^3+离子 荧光增强 

分 类 号：O631.3[理学—高分子化学]