Chemosensing of neurotransmitters with selectivity and naked eye detection of l-DOPA based on fluorescent Zn(ii)-terpyridine bearing boronic acid complexes

Abstract

Biological catecholamines such as L-DOPA and dopamine play vital physiological roles in brain, and are chemical indicators of human diseases. A new range of fluorescent Zn(II)-terpyridine complexes are described and...

Fluorescence Sensing of Monosaccharides by Bis-boronic Acids Derived from Quinolinium Dicarboxamides: Structural and Spectroscopic Studies

“…Crystals of biscatecholate ester of 2-cat 2 were straightforwardly obtained by the addition of 2.0 equiv of catechol in CH 3 OH−H 2 O. In this crystal, the boron atoms are sp 3 −hybridized with values of the tetrahedral character (THC) 53 between 97 and 99% (Table S5). Boron atoms in the crystal of 2-cat 2 are more separated (9.0 Å), probably due to the repulsion between negative charges of the boronate esters.…”

Hybrid Inorganic–Organic Complexes of Zn, Cd, and Pb with a Cationic Phenanthro-diimine Ligand

“…The aromatic ligands, e.g., strongly binding N-donors (bi-/tripyridine, phenanthroline, and other heterocycles), decorated with remote positively charged groups (pyridinium/quinolinium, phosphonium, ammonium, etc.) are not exceptional and have been used in the design of a number of phosphorescent complexes of Ru, Re, Ir, and Pt for bioimaging applications, and some Cu­(I) zwitterionic iodide clusters with delayed fluorescence. , These sorts of constructing elements, however, have not penetrated the field of inorganic–organic systems built of post-transition metals, except sporadic examples like [(quinolinium terpyridine)­ZnBr 2 ]­[ZnBr 4 (dmso)], confirming the preparative feasibility of the given strategy.…”

Water-soluble fluorescent chemosensor for sorbitol based on a dicationic diboronic receptor. Crystal structure and spectroscopic studies

“…This change in the chemical shift (Δ δ = 16 ppm) of the 11 B NMR signals is characteristic of the formation of boronate complex with diols. 48,61…”

“…This change in the chemical shi (Dd = 16 ppm) of the 11 B NMR signals is characteristic of the formation of boronate complex with diols. 48,61 Electrospray ionization (ESI) mass spectrometry has been used to study boronic acid-diol complexation. 47 Next, highresolution electrospray mass experiments were carried out in the positive mode with solutions of compound 11 in the absence and presence of sorbitol in aqueous methanol.…”