Crosslinked hydrogel-derived carbons activated by trace amounts of aqueous potassium carbonate for carbon dioxide adsorption.

A new method for green synthesis of activated carbon using chitosan-based hydrogel precursors is reported. Chitosan-based hydrogel materials are designed to absorb trace amounts of non-toxic and non-corrosive activating agent KCO from dilute aqueous solution. The KCO impregnated hydrogels are further freeze-dried and converted to activated carbons with tuneable pore structure by a single-step pyrolysis.

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

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.

Hydrazine functionalized probes for chromogenic and fluorescent ratiometric sensing of pH and F: experimental and DFT studies.

Two novel hydrazine based sensors, BPPIH (N,N-bis(perfluorophenyl)isophthalohydrazide) and BPBIH (N,N-bis(perfluorobenzylidene)isophthalohydrazide), are presented here. BPPIH is found to be a highly sensitive pH sensor in the pH range 5.0 to 10.

Exploratory studies towards various anion recognition chemistry by two different sized cleft shaped organic ligands.

Indole and urea based two organic receptors have been synthesized by an easy synthetic process. These two receptors have strong sensitivity and selectivity for several bio-relevant anions. Receptor 1 and 2 were synthesized from indole-2-carboxylic acid and p-anisidine respectively, which are low cost starting materials.