Departamento de Química, Universitat Politécnica de València, Camino de Vera s/n, 46022, Valencia, Spain.
Instituto Interuniversitario de Investigación de Reconocimiento MolecularyDesarrollo Tecnológico (IDM), Universitat Politécnica de València-Universitat de València.
Chem Asian J. 2017 Oct 18;12(20):2670-2674. doi: 10.1002/asia.201701130. Epub 2017 Sep 22.
The development of easy and affordable methods for the detection of cyanide is of great significance due to the high toxicity of this anion and the potential risks associated with its pollution. Herein, optical detection of cyanide in water has been achieved by using a hybrid organic-inorganic nanomaterial. Mesoporous silica nanoparticles were loaded with [Ru(bipy) ] , functionalized with macrocyclic nickel(II) complex subunits, and capped with a sterically hindering anion (hexametaphosphate). Cyanide selectively induces demetallation of nickel(II) complexes and the removal of capping anions from the silica surface, allowing the release of the dye and the consequent increase in fluorescence intensity. The response of the capped nanoparticles in aqueous solution is highly selective and sensitive towards cyanide with a limit of detection of 2 μm.
由于氰根离子毒性很高，且其污染存在潜在风险，因此开发简单、经济实惠的氰根离子检测方法具有重要意义。本文采用一种混合有机-无机纳米材料实现了水中氰根离子的光学检测。介孔硅纳米粒子负载[Ru(bipy)]，功能化大环镍(II)配合物亚基，并被位阻阴离子（六偏磷酸钠）封端。氰根离子选择性诱导镍(II)配合物脱金属，以及硅表面封端阴离子的去除，从而使染料释放，荧光强度增加。水相中的纳米粒子对氰根离子的响应具有高度选择性和灵敏度，检测限低至 2μm。
