Crystal-Driven Distortion of Ligands in Copper Coordination Complexes: Conformational Pseudo-Enantiomers

Abstract

A 3D graphene architecture can be prepared via an in situ self‐assembly of graphene prepared by a mild chemical reduction. Fe3O4 nanoparticles are homogeneously dispersed into graphene oxide (GO) aqueous suspension and a 3D magnetic graphene/Fe3O4 aerogel is prepared during the reduction of GO to graphene. This provides a general method to prepare 3D graphene/nanoparticle composites for a wide range of applications including catalysis and energy conversion.

Coordination and Bioinorganic Chemistry of Aryl-Appended Tris(2-Pyridylmethyl)amine Ligands

“…Aryl-appended TPA ligands have been used in the preparation of coordination complexes of Mn(II), [22,28] Fe(II) and Fe(III), [20,[23][24][25]28,34,35] Co(II), [22,28,31] Ni(II), [22,28,31,36] Cu(I) and Cu(II), [21,27,28,[37][38][39] and Zn(II). [22,28,31] Mn(II).…”

Asymmetry and steric hindrance in tripodal ligands: Reaching the limit for octahedral geometry with the newly synthesized [(6-bromo 2-pyridylmethyl) (6-fluoro 2-pyridylmethyl) (2-pyridylmethyl)] amine tripod in FeCl2 complexes

“…Tetradentate tripods derived from the tris(2-pyridylmethyl)amine (TPA) are among the most thoroughly studied with a broad range of potential applications [3][4][5][6][7]. The introduction of asymmetric centres by substitution at the methylene carbon has been reported for several years, allowing extension of the chemistry of these simple ligands to various areas (asymmetric recognition of amino acids, study of chiropticalor luminescence properties to cite only a few of them) [7][8][9][10][11][12][13]. In an other perspective, asymmetrical substitution of all the a position of the pyridyl units would represent a more straightforward modification of the reactivity site, i.e.…”

Transition metal-based chiroptical switches for nanoscale electronics and sensors

“…This stereocenter dictates the helicity of the propeller formed by the planes of the heterocycles. A number of crystallographic structures [64], with few exceptions, established the relationship between the chiral carbon center and the propeller configuration [65]. Exciton-coupled circular dichroism [17] (ECCD) established the preponderance of a single propeller conformation in solution, and tested whether the same configuration was present relative to the carbon center as had been observed in solid-state studies [66].…”