Details

Autor(en) / Beteiligte

• Mary Mathew, Merlin
• Sreekanth, Anandaram

Titel

Zn2+ion responsive fluorescent chemosensor probe of Thiophene-diocarbohydrazide derivatives

Ist Teil von

• Inorganica Chimica Acta, 2021-02, Vol.516, p.120149, Article 120149

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2021

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• [Display omitted] •A novel Thiophene diocarbohydrazide appended probe designed and synthesized.•Superior sensitivity and selectivity to Zn2+ metal ion over other metal ions.•Determined 1:1 binding ratio between the sensor HNTCH and Zn2+ metal ion.•The CHEF mechanism were investigated from fluorescence spectral study. A new fluorescent probe of Thiophene- dicarbohydrazide based chemosensor synthesized for Zn2+ion detection and investigated well. It was found that the chemosensor highly emissive when its complexation with Zn2+ ion. This turn-on fluorescence recognition was premeditated in DMSO/H2O (6:4 v/v) medium. The binding constant was calculated and it found to be 1.15 × 104 M−1. The limit of detection (LOD) was calculated to be 1.51 × 10−7 M which is well below the permissible level of Zn2+ (70 μM) in drinking water. The 1:1 binding stoichiometry of the chemosensor HNTCH-Zn2+ complex was intended from Jobs’ plot. The observed fluorescent enhancement turn-on emission can be delineated by chelation enhanced fluorescence mechanism. The reversibility and INHIBIT/IMPLICATION Logic gate behaviour were performed for HNTCH-Zn2+ complex with EDTA accordingly.