Colorimetric Cyanide Chemosensor Based on 1′,3,3′,4-Tetrahydrospiro[chromene-2,2′-indole]
作者:Miglė Dagilienė、Vytas Martynaitis、Vilija Kriščiūnienė、Sonata Krikštolaitytė、Algirdas Šačkus
DOI:10.1002/open.201402117
日期:2015.6
the 1′,3,3′,4‐tetrahydrospiro[chromene‐2,2′‐indole] ring system, which detects cyanide with high specificity, is described. These chemosensors show a distinct color change when treated with cyanide in acetonitrile solution buffered with sodium phosphate, and this procedure is not affected by the presence of other common anions. The chemisensors exhibit high sensitivity to low concentrations of cyanide
描述了一种基于1',3,3',4-四氢螺环[chromene-2,2'-吲哚]环系统的新型化学传感器,该化学传感器可高特异性地检测氰化物。这些化学传感器在氰化钠与磷酸钠缓冲的乙腈溶液中用氰化物处理时,会显示出明显的颜色变化,并且此过程不受其他常见阴离子的影响。化学传感器对低浓度的氰化物表现出高灵敏度,符合欧盟水质控制标准,灵敏度低于0.05 mg L -1,并在数十秒内显示出非常快的响应。通过氰化阴离子对吲哚啉C-2原子上的酚氧原子进行亲核取代,形成稳定的吲哚腈加合物,并生成有色的4-硝基酚盐发色团,从而合理地确定了检测机理。这些化学传感器可以通过简单的方法由市售的起始原料合成。