Synthesis and structural analyses of phenylethynyl-substituted tris(2-pyridylmethyl)amines and their copper(ii) complexes

Abstract

remarkably deformed carbon-carbon triple bond enforced by a steric effect of the three phenyl groups. Most significantly, a total of seventy non-covalent interactions, classified into twelve types of hydrogeninvolving short contacts, were identified in this study. The phenylethynyl substituent participated in fortytwo interactions as a hydrogen bond acceptor, and its role was more distinctive in the crystal structures of the Cu(II) complexes.

Extending substrate sensing capabilities of zinc tris(2‐pyridylmethyl)amine‐based stereodynamic probe

“…Among these, polydentate and, more specifically, tripodal ligands proved to be particularly efficient, since they are modular and give robust complexes with high thermodynamic stability. [28][29][30][31] As shown by Canary first, TPMA is characterized by a propeller-like arrangement of the ligand around the metal, [32][33][34][35][36][37] and the (non)covalent addition of a stereogenic element allows to bias the molecular system in one of the two helical configurations. [12][13][14][15] According to the metal used, they have already found application not only in molecular recognition [16][17][18][19] and sensing 20,21 but also in catalysis (hydrolysis, oxidation, polymerization) 22-27 and bioimaging.…”

“…[12][13][14][15] According to the metal used, they have already found application not only in molecular recognition [16][17][18][19] and sensing 20,21 but also in catalysis (hydrolysis, oxidation, polymerization) 22-27 and bioimaging. [28][29][30][31] As shown by Canary first, TPMA is characterized by a propeller-like arrangement of the ligand around the metal, [32][33][34][35][36][37] and the (non)covalent addition of a stereogenic element allows to bias the molecular system in one of the two helical configurations. In the presence of suitable chromophores, this phenomenon gives rise to an intense chiroptical absorption [38][39][40] which can be monitored by electronic circular dichroism (CD).…”

Synthesis and molecular structure of functionalized tris[2‐(4′‐substituted butoxyphenyl)]phosphine oxides as precursors of tripodal ligands

“…Side arms can be of different length and rigidity and include numerous functional groups of different nature (hard and soft bases or hydrogen bond donors). This architecture enables one to construct ligands capable of binding to cations, anions, and neutral molecules . These ligands are useful as extractants for d ‐block and f ‐block elements, for transmembrane transport, as synthetic sensors and receptors, while their complexes find an application in medical imaging and therapy, for designing single‐molecule magnets, catalysts, etc.…”