4-乙烯基苯硼酸聚合物纳米材料的制备及其在果糖检测中的应用

Preparation of Poly(4-Vinylphenylboronic Acid)Nanomaterial and Its Application in Fructose Detection

采用可逆加成-断裂链转移聚合(RAFT)和溶液自组装方法制备了聚(4-乙烯基苯硼酸)-b-聚(N,N-二甲基丙烯酰胺)嵌段共聚物和含苯硼酸基团的核壳结构球形纳米材料,具有100 nm和200 nm两种尺寸。在水环境中,苯硼酸基团能与染料茜素红、槲皮素、8-羟基喹啉结合产生荧光,从而构建了新型荧光传感器。其中,PVPBA_(315)-b-PDMA_(90)/QC荧光传感器遇到果糖时发生明显的荧光淬灭现象,可以特异性地检测果糖,在果糖浓度为0~82.5 mmol/L范围内,其荧光强度呈现线性淬灭,检测限低至60 nmol/L。

Reversible addition-fragmentation chain transfer(RAFT)polymerization were used to prepare block copolymer PVPBA-b-PDMA and then two core-shell spherical nanomaterials containing phenylboronic acid groups with the diameter of 100 nm and 200 nm were obtained via solution self-assembly methods.In the aqueous environment,the phenylboronic acid group on the corona of nanomaterials could reversibly combine with the dyes,such as Alizarin Red,Quercetin,and 8-Hydroxyquinoline,to produce fluorescence,and three fluorescent sensors were constructed.Among them,PVPBA_(315)-b-PDMA_(90)/QC shows the fluorescence quenching phenomenon with the addition of fructose,and the fluorescence sensor could specifically detect fructose.In the range of fructose concentration of 0-82.5 mmol/L,the fluorescence intensity decreases linearly and its detection limit is as low as 60 nmol/L.