Hg(ii) supramolecular isomers: structural transformation and photoluminescence change

Meso‐Helical Ag(I) Coordination Polymer Based on a Pyridylimidazole Ligand

“…In the fields of material science and metallosupramolecular chemistry, coordination polymers with various helical types have been extensively explored because of their charming structures, and their potential applications in material chemistry . Among them, meso ‐helical coordination polymers consisting of achiral 1D strands, which are generally constructed by a crystallographic inversion symmetry, are relatively rare . Therefore, only a few infinite meso ‐helical coordination polymers have been reported until now .…”

“…Among them, meso ‐helical coordination polymers consisting of achiral 1D strands, which are generally constructed by a crystallographic inversion symmetry, are relatively rare . Therefore, only a few infinite meso ‐helical coordination polymers have been reported until now . The reason for rare examples in metallosupramolecular chemistry may be that the formation of meso ‐helical coordination polymer requires building blocks or subunits with two flexures, in which right‐ and left‐handed helical units co‐exist 3b,f .…”

“…Therefore, only a few infinite meso ‐helical coordination polymers have been reported until now . The reason for rare examples in metallosupramolecular chemistry may be that the formation of meso ‐helical coordination polymer requires building blocks or subunits with two flexures, in which right‐ and left‐handed helical units co‐exist 3b,f . In addition, suitable ligands toward meso ‐helical coordination polymer are hardly designed and synthesized.…”

One-Dimensional Mercury Halide Coordination Polymers Based on A Semi-Rigid N-Donor Ligand: Reversible Structural Transformation

“…The structural transformations are intriguing in CPs due to their potential applications in switches and sensors, which can be triggered by exchange of guest molecules, removal and uptake of solvents and external stimuli like heat, light, and mechanical forces [2]. The synthesis and structures of a variety of one-dimensional (1D) mercury(II) CPs have been reported, however, it remains a challenge to elucidate their structure-ligand relationship and thereby the intrinsic properties [3,4,5,6,7,8,9,10,11,12,13,14].…”

“…We have made our effort to investigate the structural diversity and properties of the CPs constructed from the bis-pyridyl-bis-amide ligands [10] and several Hg(II) CPs that exhibited structural transformations have been reported [4,5,11]. The HgI 2 -containing CP [Hg(1,2-pbpa)I 2 ] n [1,2-pbpa = 2,2′-(1,2-phenylene)-bis( N -pyridin-3-yl)acetamide] has been shown to display reversible structural transformation with [Hg(1,2-pbpa)I 2 ·MeOH] n and [Hg(1,2-pbpa)I 2 ·MeCN] n upon adsorption/desorption and exchange of methanol and acetonitrile molecules, which demonstrate the importance of N–H---X (X = halide anion) and Hg---X interactions in the evaluation of structural transformation [4].…”