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首页> 外文期刊>Chemistry: A European journal >Decoration of gold nanoparticles by a double-armed calix[4]pyrrole: A receptor-decorated nanoensemble for anion sensing and extraction
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Decoration of gold nanoparticles by a double-armed calix[4]pyrrole: A receptor-decorated nanoensemble for anion sensing and extraction

机译：双臂杯[4]吡咯修饰金纳米颗粒：阴离子修饰和阴离子感测的受体修饰纳米集合

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摘要

Gold nanoparticles decorated with a double-armed, deep-cavity calix[4]pyrrole were prepared and fully characterized. Transmission electron microscopy imaging revealed that the average diameter of the particles was approximately 4 nm both before and after attachment of the receptor to the surface. The calix[4]pyrrole-functionalized nanoparticles exhibited highly elevated sensing behavior (approximately 1000 times in dichloromethane) relative to its monomeric congener while maintaining its guest selectivity. The receptor-nanoparticle conjugate (nanoreceptor) showed significant aggregation upon addition of the biphenolate anion, an effect ascribed to anion-mediated interparticle linking. The receptor-nanoparticle conjugate is also capable of extracting the fluoride anion (as its tetrabutylammonium salt) from an aqueous layer to an organic medium. Control experiments revealed that this extraction is not possible when using the analogous monomeric receptor.
机译：制备并充分表征了双臂深腔杯[4]吡咯修饰的金纳米颗粒。透射电子显微镜成像显示，在将受体附着于表面之前和之后，颗粒的平均直径均为约4nm。相较于其单体同类物，杯[4]吡咯官能化的纳米粒子表现出高度提高的传感行为（在二氯甲烷中约为1000倍），同时保持了其客体选择性。受体-纳米粒子共轭物（纳米受体）在加入双酚盐阴离子后显示出明显的聚集，这归因于阴离子介导的粒子间连接。受体-纳米颗粒共轭物还能够将氟阴离子（作为其四丁基铵盐）从水层中萃取到有机介质中。对照实验表明，当使用类似的单体受体时，这种提取是不可能的。

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