1458033-57-2Relevant academic research and scientific papers
Colorimetric Cyanide Chemosensor Based on 1′,3,3′,4-Tetrahydrospiro[chromene-2,2′-indole]
Dagiliene, Migle,Martynaitis, Vytas,Kri??iuˉniene, Vilija,Krik?tolaityte, Sonata,?a?kus, Algirdas
, p. 363 - 369 (2015/06/30)
A new class of chemosensors based on 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, meeting the European Union water quality control criterion of sensitivity below 0.05 mg L-1, and show a very fast response within tens of seconds. The mechanism for detection is rationalized by the nucleophilic substitution of the phenolic oxygen atom at the indoline C-2 atom by the cyanide anion to form a stable indolylnitrile adduct and to generate the colored 4-nitrophenolate chromophore. These chemosensors can be synthesized by a simple procedure from commercially available starting materials.
Synthesis of 1′,3,3′,4-tetrahydrospiro[chromene-2,2′- indoles] as a new class of ultrafast light-driven molecular switch
Dagiliene, Migle,Martynaitis, Vytas,Vengris, Mikas,Redeckas, Kipras,Voiciuk, Vladislava,Holzer, Wolfgang,?a?kus, Algirdas
, p. 9309 - 9315 (2013/10/01)
A new class of ultrafast light-driven molecular switch has been designed and synthesized. The reaction of 1-substituted 2-methylidene-3,3-dimethyl-2,3- dihydro-1H-indoles with 2-chloromethyl-4-nitrophenol afforded 1′,3,3′,4-tetrahydrospiro[chromene-2,2′-indoles], following a basic workup. The spectroscopic properties and nanosecond-resolved photoinduced dynamics of five compounds in the 1′,3,3′,4- tetrahydrospiro[chromene-2,2′-indole] family were investigated.
