文献类型：期刊文献

中文题名：基于葫芦脲衍生物超分子聚合物的构建与性能

英文题名：Preparation and Properties of Supramolecular Polymers Based on Cucurbit[n]uril Derivative

作者：王秀丽[1];王巧纯[1]

机构：[1]华东理工大学化学与分子工程学院,精细化工研究所,结构可控先进功能材料及其制备教育部重点实验室,上海200237

年份：2020

卷号：46

期号：4

起止页码：510

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2017】；CSCD:【CSCD_E2019_2020】；

基金：国家自然科学基金(21572063)。

语种：中文

中文关键词：超分子聚合物;葫芦脲;自组装;芘;Ba^2+检测

外文关键词：supramolecular polymer;cucurbit[n]urils;self-assembly;pyrene;Ba^2+detection

摘要：利用1,3,6,8-四(4-氨基苯基)芘盐酸盐1与葫芦[5]脲类似物(十甲基取代亚甲基桥葫芦[5]脲,Me10TD[5])在水溶液中构建了一种超分子聚合物。该聚合物经荧光发射光谱、核磁共振氢谱(1H-NMR)、动态光散射实验(DLS)和透射电子显微镜(TEM)等手段加以表征。结果表明:1与Me10TD[5]以物质的量之比为1∶2构建成超分子聚合物,其结合常数为(7.1±0.7)×10^4 L/mol。同时,研究了该聚合物对金属离子的识别性能,在超分子聚合物的水溶液中分别加入Ba^2+、Ca^2+、Co^2+、Ni^2+、Pd^2+、Zn^2+、Fe^2+、Mg^2+、Cd^2+、Mn^2+、Cu^2+,发现加入Ba^2+能使体系荧光显著增强,并具有一定的抗干扰性。所以该聚合物可以用作Ba^2+的检测,检出限为7.6×10^?6 mol/L。
Cucurbit[n]urils(CB[n]s)are macrocyclic host molecules with polar carbonyl groups on both portals,which enable CB[n]s to bind strongly and selectively with cationic species,especially to protonated organic amines.Here,a supramolecular polymer has been successfully constructed by the self-assembly between a cucurbit[5]uril analogue(decamethyl substituted methylene bridge cucurbit[5]uril,Me10TD[5])and 1,3,6,8-tetrakis(4-aminophenyl)pyrene tetrahydrochloride salt in aqueous solution through portal interactions.Diverse measurements were used to characterize the formation of this polymer,including fluorescence emission spectrum,1H-NMR spectroscopy,dynamic light scattering(DLS)and transmission electron microscopy(TEM).The 1H-NMR measurements and the Job's plot indicated that 1,3,6,8-tetrakis(4-aminophenyl)pyrene tetrahydrochloride salt and Me10TD[5]were combined in a mole ratio of 1∶2.The association constant(Ka)was calculated to be(7.1±0.7)×10^4 L/mol by non-linear curve-fitting method based on the fluorescence experiments.Transmission electron microscopy image and the dynamic light scattering measurements demonstrated that 1,3,6,8-tetrakis(4-aminophenyl)pyrene tetrahydrochloride salt and Me10TD[5]could self-assemble into supramolecular polymers and the self-assembly behavior would lead to a certain degree of red shift of the maximum emission wavelength along with the decrease in fluorescence intensity.Meanwhile,the recognition performance of the polymer on metal ions was studied.Upon the addition of Ba^2+,Ca^2+,Co^2+,Ni^2+,Pd^2+,Zn^2+,Fe^2+,Mg^2+,Cd^2+,Mn^2+,Cu^2+,it was found that Ba^2+could significantly enhance the fluorescence of the system and had a certain degree of anti-interference.Therefore,this polymer can be used to detect Ba^2+,and the detection limit of the polymer for Ba^2+is 7.6×10^-6 mol/L.