Exploratory studies on azido-bridged complexes (Ni2+ and Mn2+) as dual colourimetric chemosensors for S2− and Ag+: combined experimental and theoretical outcomes with real field applications. Issue 37 (15th September 2020)

• Record Type: Journal Article
• Authors: Pandit, Nithun Ranjan; Bej, Sourav; Mondal, Ananya; Ghosh, Meenakshi; Kostakis, George E.; Powell, Annie K.; Banerjee, Priyabrata; Biswas, Biplab
• Is Part Of: Dalton transactions. Volume 49:Issue 37(2020)
• Page Start: 13090
• Page End: 13099
• Publication Date: 2020-09-15
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d0dt02846k
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : We report two isostructural dinuclear transition metal complexes [M2 (HL)2 (N3 )4 ], where M = Ni 2+ (BS-1 ) or Mn 2+ (BS-2 ) and HL is (2-methyl-2-((pyridin-2-ylmethyl)amino)propan-1-ol) and investigate them as molecular sensors towards hazardous entities. Abstract : We report two isostructural dinuclear transition metal complexes [M2 (HL)2 (N3 )4 ], where M = Ni 2+ (BS-1 ), Mn 2+ (BS-2 ), and HL is (2-methyl-2-((pyridin-2-ylmethyl)amino)propan-1-ol) and investigate them as molecular sensors towards hazardous entities. BS-1 shows high selectivity towards the S 2− and Ag + ions, easily observed by the naked eye colour change and its detection limit in aqueous solutions for the S 2− ion was calculated as 0.55 μM with a binding constant of 3.28 × 10 5 M −1, while the limit for the Ag + ion is 21.8 μM. Notably, BS-2 shows good selectivity towards the Ag + ion with a detection limit of 10.84 μM. Spectroscopic and DFT studies shed light on the mechanistic course of interaction between the host and guest entities, suggesting a sulphide-mediated reduction of the azide mechanism. In a nutshell, these simple transition metal complexes were exploited for discriminately detecting hazardous analytes with real field applications in analytical science ( via. "Dip-Stick " approach) as well as engineering science, which provides a significant contribution in the recent advancement of supramolecular chemistry.