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Iron(III)-Quantity-Dependent Aggregation–Dispersion Conversion of Functionalized Gold Nanoparticles

机译:铁(III)-数量相关的聚集-功能化金纳米粒子的分散转换。

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摘要

Developing gold nanoparticles (AuNPs) with welldesigned functionality is highly desirable for boosting the performance and versatility of inorganic–organic hybrid materials. In an attempt to achieve ion recognition with specific signal expressions, we present here 4-piperazinyl-1,8-naphthalimide- functionalized AuNPs for the realization of quantitative recognition of Fe~(III) ions with dual (colorimetric and fluorescent) output. The research takes advantage of 1) quantity- controlled chelation-mode transformation of the piperazinyl moiety on the AuNPs towards Fe~(III), thereby resulting in an aggregation–dispersion conversion of the AuNPs in solution, and 2) photoinduced electron transfer of a naphthaimide fluorophore on the AuNPs, thus leading to reversible absorption and emission changes. The functional AuNPs are also responsive to pH variations. This strategy for realizing the aggregation–dispersion conversion of AuNPs with returnable signal output might exhibit application potential for advanced nanoscale chemosensors.
机译:为了提高无机-有机杂化材料的性能和多功能性,开发具有精心设计的功能的金纳米颗粒(AuNPs)非常必要。为了尝试实现具有特定信号表达的离子识别,我们在此介绍了4-哌嗪基-1,8-萘二甲酰亚胺功能化的AuNP,用于定量识别具有双输出(比色和荧光)的Fe〜(III)离子。该研究利用了1)AuNPs上的哌嗪基部分向Fe〜(III)的量控螯合模式转变,从而导致AuNPs在溶液中的聚集-分散转化,以及2)a的光诱导电子转移。 AuNPs上的萘二甲酰亚胺荧光团,因此导致可逆的吸收和发射变化。功能性AuNP也对pH变化有响应。这种实现具有可返回信号输出的AuNP的聚集-分散转换的策略可能会展示出先进的纳米级化学传感器的应用潜力。

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