Azo dye-based latent colorimetric chemodosimeter for the selective detection of cyanides in aqueous buffer

A Novel Thiophene-Based Fluorescent Chemosensor for the Detection of Zn2+ and CN−: Imaging Applications in Live Cells and Zebrafish

“…In contrast, one of the amide protons (H 3 ) was shifted to downfield, suggesting that the H 3 proton might hydrogen bond to CN − or HCN species (Scheme 3). These outcomes implied that the negative charge generated from the deprotonation of compound DHADC by cyanide was delocalized through the DHADC [56]. No movement of the proton signals was detected with addition of more amounts of CN − (>2 equiv.).…”

Simple colorimetric chemodosimeters for selective sensing of cyanide ion in aqueous solution via termination of ICT transition by Michael addition

“…This order matches exactly with the magnitude of the Taft"s polar substituent constants ζ * of the substituents. The detection limits of the receptors for CN -ions were calculated (S/N=3) as reported earlier[40][41][42]. The detection limits obtained are 0.49, 0.14 and 0.01 µM for R1, R2 and R3, respectively.…”

Styrene and Azo-Styrene Based Colorimetric Sensors for Highly Selective Detection of Cyanide

“…Limit of detection (LOD) cyanide ion in sensor 1 was measured by 3σ/m in DMSO through the UV-vis titration experiment [13][14][15]. Color change and UV-vis spectra are shown Fig.…”

“…Cyanide gave hypsochromic shift (blueshift) from 647 nm to 601 nm. That phenomenon is called chemodosimeter, it is caused by nucleophilic addition CN -to binding site of sensor 2 [15][16]. Prediction interaction of sensor 2 and CN -is shown in Fig.…”