2-one). The coumarin free-ligands and the metal complexes 1–3 were characterized by NMR, UV–Vis and FTIR spectroscopy, melting point and molar conductivity measurements as well as time-of-flight mass spectrometry. Their structural elucidations were supported by the respective solid state structures of 1, Hhbc and moac. DNA binding studies conducted using the facial tricarbonylrhenium(I) complexes 2
A coumarin-based derivative (1), a highly selective and sensitive turn-on fluorogenic probe for the detection of HSO4â ions in aqueous solution, has been designed and synthesized. Various spectroscopic and DFT calculations revealed that H-bonding between the phenolic âOH and imine nitrogen of 1 played a crucial role in its high selectivity for HSO4â.
Fluorescent iridium(<scp>iii</scp>) coumarin-salicylaldehyde Schiff base compounds as lysosome-targeted antitumor agents
作者:Cong Liu、Xicheng Liu、Xingxing Ge、Qinghui Wang、Lei Zhang、Wenjing Shang、Yue Zhang、Xiang Ai Yuan、Laijin Tian、Zhe Liu、Jinmao You
DOI:10.1039/d0dt00627k
日期:——
coefficient: ∼0.7), damaged the integrity of the lysosomes, and induced apoptosis. The compounds could also decrease the mitochondrial membrane potential, catalyze the oxidation of the coenzyme (nicotinamide-adenine dinucleotide) and improve the levels of the intracellular reactive oxygen species, following an antitumormechanism of oxidation. Additionally, these compounds could block the metastasis of tumor
Uncovering the true mechanism of optical detection of HSO4− in water by Schiff-base receptors – hydrolysis vs. hydrogen bonding
作者:Virendra Kumar、Ajit Kumar、Uzra Diwan、K. K. Upadhyay
DOI:10.1039/c2cc33130f
日期:——
The mechanism of optical detection of HSO4â in aqueous medium by Schiff-base receptors has previously been proposed to depend on selective hydrogen-bond interactions. Here, we clearly demonstrate for the first time that the acidic nature of this anion gives rise to hydrolysis of the Schiff base, which leads to the optical changes observed in this family of receptors.