Colorimetric 'Naked-Eye' Chemodosimeter for the Detection of CN^- Ion: Experimental and Theoretical Studies.

ABSTRACT: An azo-based chemodosimeter (N'E)-3-hydroxy-N'-(2-hydroxy-5-((4-nitrophenyl)diazenyl) benzylidene)-2-naphthohydrazide (hhnbn) has been synthesized by a two-step method and characterized by FT-IR and ¹H NMR spectroscopies and ESI-MS. Upon addition of CN^- ion, hhnbn produces a new absorption band at ∼510 nm and, subsequently, red color in H₂O/DMSO (7:3 v/v) medium, which is noticeable under naked eye condition selectively. Moreover, Whatman filter paper test strips, previously soaked in hhnbn solution and dried, are detected to generate red color in the presence of CN^- ion selectively. Nucleophilic addition reaction of the CN^- ion to the imine carbon (CH=N) of hhnbn is substantiated by ¹H NMR titrat

SUBMITTER: Yadav KK 

PROVIDER: S-EPMC12004164 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature