Lawsone (2-hydroxy-1,4-naphthoquinone) as a sensitive cyanide and acetate sensor

Naphthoquinone based chemosensor 2-(2′-aminomethylpyridine)-3-chloro-1,4-naphthoquinone for metal ions: Single crystal X-ray structure, experimental and TD-DFT study

“…2-hydroxy-1,4-naphthoquinone (Heena dye) reacts with latent finger mark deposits on paper surfaces to yield photoluminesent purple brown impressions [2]. This dye can also be used as anion sensor [3].…”

A portable optical human sweat sensor

“…11 A cyanide and acetate sensor was implemented using HNQ optical properties. 12 It has been well established that sweat can be considered the diluted version of blood in terms of constituents such as electrolytes and minerals. 13,14 Although contents in sweat appear in lower concentration than in blood, the sensitivity of current sensor technology has made it possible to detect such changes.…”

Highly efficient, catalyst‐free, one‐pot, pseudo five‐component synthesis of novel pyrazoline‐containing Schiff bases, metal complexes formation and computational studies via DFT method

“…Continuing our recent studies on the synthesis of pharmacologically interesting heterocyclic compounds and green chemistry protocols, we report a simple and highly efficient synthesis of novel pyrazoline‐containing Schiff bases by in situ generation of diamine (DHNE) from the reaction of 1,1‐bis(methylthio)‐2‐nitroethylene (BMTNE) and hydrazine, and its application for one‐pot condensation reaction with various aldehydes under catalyst‐free conditions in EtOH at room temperature (Scheme ). In another section, Job's method (the method of continuous variation) was employed to determine the stoichiometry of the reaction of pyrazoline‐containing Schiff base 4o as ligand and metal ions [Mn(OAc) 2 , Cu(OAc) 2 and Zn(OAc) 2 ]. In addition, to indicate the electron donor area of the ligand 4o , the frontier molecular orbital (FMO) study is performed via DFT calculations at the level of B3LYP/6‐311G in the gas phase.…”