Indian Institute of Technology Indore

About: Indian Institute of Technology Indore is a education organization based out in Indore, Madhya Pradesh, India. It is known for research contribution in the topics: Computer science & Chemistry. The organization has 1606 authors who have published 4803 publications receiving 66500 citations.

A simple urea-based multianalyte and multichannel chemosensor for the selective detection of F−, Hg2+ and Cu2+ in solution and cells and the extraction of Hg2+ and Cu2+ from real water sources: a logic gate mimic ensemble

Abstract: Herein, a hydrazine-based chromogenic, fluorogenic and electrochemical chemosensor BCC [1,5-bis(4-cyanophenyl) carbonohydrazide] was premeditated and synthesized through a simple one-step synthetic procedure for the selective detection of toxic anions, such as F−, in a DMSO–ACN medium and cations, such as Hg2+ and Cu2+, in a MeOH–water medium. The detection limit for F− was reckoned to be 0.5 ppm, and for Hg2+ and Cu2+, it was 0.8 ppm and 50 nM, respectively. The chemosensor exhibited a distinct change in colour from colourless to dark blue in the presence of F−, and upon the addition of Hg2+ and Cu2+, the BCC turned from colourless to light blue and purple accordingly. Moreover, turn-on fluorescence response transpired by the attenuation of PET signified the selective sensing of analytes with a zero-order rate constant. Sophisticated analytical experiments, such as ESI-MS, UV-Vis, photoluminescence, cyclic voltammetry, FTIR, and 1H-NMR, along with the theoretical calculations corroborated the probable sensing pathways. The reversible colorimetric response of BCC towards F− and H+ can be advantageous in the design of electronic circuits derived from Boolean algebra. The complexation ability of the sensor with toxic Hg2+- and Cu2+-like ions made it an efficient material to remove these metal ions from real water sources polluted with these toxic elemental ions. Furthermore, the in vitro studies were accomplished using the Bauhinia acuminate pollen cell to check the cell penetrability of the sensor molecule.

Sensitivity of the valence structure in diruthenium complexes as a function of terminal and bridging ligands.

Abstract: The compounds [(acac)2RuIII(μ-H2L2–)RuIII(acac)2] (rac, 1, and meso, 1′) and [(bpy)2RuII(μ-H2L•–)RuII(bpy)2](ClO4)3 (meso, [2](ClO4)3) have been structurally, magnetically, spectroelectrochemically, and computationally characterized (acac– = acetylacetonate, bpy = 2,2′-bipyridine, and H4L = 1,4-diamino-9,10-anthraquinone). The N,O;N′,O′-coordinated μ-H2Ln– forms two β-ketiminato-type chelate rings, and 1 or 1′ are connected via NH···O hydrogen bridges in the crystals. 1 exhibits a complex magnetic behavior, while [2](ClO4)3 is a radical species with mixed ligand/metal-based spin. The combination of redox noninnocent bridge (H2L0 → → → →H2L4–) and {(acac)2RuII} → →{(acac)2RuIV} or {(bpy)2RuII} → {(bpy)2RuIII} in 1/1′ or 2 generates alternatives regarding the oxidation state formulations for the accessible redox states (1n and 2n), which have been assessed by UV–vis–NIR, EPR, and DFT/TD-DFT calculations. The experimental and theoretical studies suggest variable mixing of the frontier orbitals of the metals ...