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    王秀丽, 王巧纯. 基于葫芦脲衍生物超分子聚合物的构建与性能[J]. 华东理工大学学报(自然科学版), 2020, 46(4): 510-516. DOI: 10.14135/j.cnki.1006-3080.20190417001
    引用本文: 王秀丽, 王巧纯. 基于葫芦脲衍生物超分子聚合物的构建与性能[J]. 华东理工大学学报(自然科学版), 2020, 46(4): 510-516. DOI: 10.14135/j.cnki.1006-3080.20190417001
    WANG Xiuli, WANG Qiaochun. Preparation and Properties of Supramolecular Polymers Based on Cucurbit[n]uril Derivative[J]. Journal of East China University of Science and Technology, 2020, 46(4): 510-516. DOI: 10.14135/j.cnki.1006-3080.20190417001
    Citation: WANG Xiuli, WANG Qiaochun. Preparation and Properties of Supramolecular Polymers Based on Cucurbit[n]uril Derivative[J]. Journal of East China University of Science and Technology, 2020, 46(4): 510-516. DOI: 10.14135/j.cnki.1006-3080.20190417001

    基于葫芦脲衍生物超分子聚合物的构建与性能

    Preparation and Properties of Supramolecular Polymers Based on Cucurbitnuril Derivative

    • 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,Me10TD5)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Me10TD5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)× 104 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Ba2+、Ca2+、Co2+、Ni2+、Pd2+、Zn2+、Fe2+、Mg2+、Cd2+、Mn2+、Cu2+,发现加入Ba2+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Ba2+的检测,检出限为7.6 × 10−6 mol/L。

       

      Abstract: Cucurbitnurils (CBns) are macrocyclic host molecules with polar carbonyl groups on both portals, which enable CBns 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 cucurbit5uril analogue (decamethyl substituted methylene bridge cucurbit5uril, Me10TD5) 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 Me10TD5 were combined in a mole ratio of 1∶2. The association constant (Ka) was calculated to be (7.1 ± 0.7) × 104 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 Me10TD5 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 Ba2+, Ca2+, Co2+, Ni2+, Pd2+, Zn2+, Fe2+, Mg2+, Cd2+, Mn2+, Cu2+, it was found that Ba2+ could significantly enhance the fluorescence of the system and had a certain degree of anti-interference. Therefore, this polymer can be used to detect Ba2+, and the detection limit of the polymer for Ba2+ is 7.6 × 10-6 mol/L.

       

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