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<p>Electrochemiluminescence (ECL) has emerged as an important analytical method, but the scarcity of effective emitters significantly hinders its broader application. In this work, an amine-rich silica isoporous membrane (A-SIM) was fabricated on an indium tin oxide (ITO) electrode based on a modified Stöber-solution growth approach using an anionic template. Subsequently, the negatively-charged gold nanoclusters (AuNCs) were electrophoretically encapsulated within the positively-charged nanochannels of A-SIM, resulting in a robust aggregation-induced ECL (AIECL) platform of AuNCs@A-SIM/ITO. When compared to other configurations, such as homogeneous dispersion, drop-casting on the electrode, and encapsulation within unmodified SIM, the aggregated AuNCs encapsulated within A-SIM exhibited a remarkable AIECL effect, achieving an ECL efficiency of 17.89%. In contrast, the presence of cyanide ions (CN<sup>−</sup>) leads to the specific etching of AuNCs, resulting in a diminished AIECL intensity, which enables the highly sensitive and selective detection of CN<sup>−</sup>. Practical results demonstrate that the AuNCs@A-SIM/ITO platform is sensitive and reliably stable in its ECL responses, attributing to the nanochannel-confined AIECL mechanism as well as the anti-fouling properties of SIM. This research not only offers a practical approach for achieving robust nanoconfined AIECL of AuNCs but also provides new insights into the AIECL mechanism, encouraging further exploration in this area.</p> Graphical Abstract <p></p>

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Electrophoretically encapsulated gold nanoclusters within a silica isoporous membrane for achieving aggregation-induced electrochemiluminescence and cyanide detection

  • 期刊论文

  • 发表日期：

    2025年11月7日

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  • Qingda Yao,
  • Guiyun Zhang,
  • Qiaoling Fang,
  • Huan Ju,
  • Jiancong Ni,
  • Weiqiang Yang

摘要

Electrochemiluminescence (ECL) has emerged as an important analytical method, but the scarcity of effective emitters significantly hinders its broader application. In this work, an amine-rich silica isoporous membrane (A-SIM) was fabricated on an indium tin oxide (ITO) electrode based on a modified Stöber-solution growth approach using an anionic template. Subsequently, the negatively-charged gold nanoclusters (AuNCs) were electrophoretically encapsulated within the positively-charged nanochannels of A-SIM, resulting in a robust aggregation-induced ECL (AIECL) platform of AuNCs@A-SIM/ITO. When compared to other configurations, such as homogeneous dispersion, drop-casting on the electrode, and encapsulation within unmodified SIM, the aggregated AuNCs encapsulated within A-SIM exhibited a remarkable AIECL effect, achieving an ECL efficiency of 17.89%. In contrast, the presence of cyanide ions (CN−) leads to the specific etching of AuNCs, resulting in a diminished AIECL intensity, which enables the highly sensitive and selective detection of CN−. Practical results demonstrate that the AuNCs@A-SIM/ITO platform is sensitive and reliably stable in its ECL responses, attributing to the nanochannel-confined AIECL mechanism as well as the anti-fouling properties of SIM. This research not only offers a practical approach for achieving robust nanoconfined AIECL of AuNCs but also provides new insights into the AIECL mechanism, encouraging further exploration in this area.

Graphical Abstract