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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 behavior of Tb3 + ions in the template-synthesized hydrophobic association water-soluble polymer polyacrylamide / 4- (ω-acryloyloxyethoxy) benzoic acid (P (AM-co-PEBA) In the solution, P (AM-co-PEBA) changed the microenvironment of Tb3 + ions and reduced the number of Tb3 + ion-complexing water through the complexation of carboxyl groups and hydrophobic association, and increased the Tb3 + ion fluorescence intensity The increase of PEBA content in polymer or the presence of PEBA in the form of micro-block enhance the microenvironment effect.On the other hand, the polymer P (AM-co-PEBA) has UV- “Antenna effect” and Tb3 + ion energy transfer, and further improve the Tb3 + ion fluorescence intensity.