Tuning zinc coordination architectures by benzenedicarboxylate position isomers and bis(triazole)

Joint Experimental and Computational Investigation of the Flexibility of a Diacetylene‐Based Mixed‐Linker MOF: Revealing the Existence of Two Low‐Temperature Phase Transitions and the Presence of Colossal Positive and Giant Negative Thermal Expansions

“…These initially unsuspected features are quite astounding, as they come about in the absence of any modification of the contents of the unit cell. Yet, in retrospect, the nature of the metal center (tetrahedrally‐ vs. octahedrally‐coordinated metal ion), the choice of the isophthalate anion rather than the terephthalate anion, the use of a semi‐rigid neutral ligand, and the presence of hydrogen‐bonded solvent molecules certainly all contribute one way or another to this flexibility. Also, it is important to note that the topology of the network is conducive to flexibility as it is made of non‐interpenetrating sheets that can move freely …”

“…Concerning the anionic ligand, we have chosen to use the isophthalate anion ( L2 ) (Scheme ). With this V‐shaped ligand, two major structural types have been identified previously by X‐ray diffraction, 2D infinite (4,4) networks and coordination polymers with interdigitated structures (CIDs) . We report herein that solvothermal treatment of a N , N ‐dimethylformamide (DMF) solution of L1⋅ H 2 O, Zn(NO 3 ) 2 ⋅ 6 H 2 O, and isophthalic acid, results in the formation of the mixed‐linker PCP {[Zn( L1 )( L2 )](DMF) 2 } n (Scheme ).…”

Synthesis, structures and luminescence properties of two mixed nickel(II) coordination polymers bearing a rigid bis-triazole linker

“…Notably, rigid bis(triazole) ligands exhibit versatile luminescent properties due to their conjugated backbones, which offer interesting possibilities for optical materials. However, few MOCPs based on rigid bis(triazole) ligands have been described to date [18,19]. Three structurally diverse Zn(II) coordination polymers with 1,2-, 1,3-and 1,4-benzenedicarboxylates plus 1,4-bis(1,2,4-triazol-4-yl)benzene ligands have recently been described [18].…”

“…However, few MOCPs based on rigid bis(triazole) ligands have been described to date [18,19]. Three structurally diverse Zn(II) coordination polymers with 1,2-, 1,3-and 1,4-benzenedicarboxylates plus 1,4-bis(1,2,4-triazol-4-yl)benzene ligands have recently been described [18]. In our most recent work, we reported a copper(II) complex containing rigid 4,4 0 -bis(1,2,4-triazolyl)biphenyl (btb) ligand, {[Cu 3 (btb) 3 (-nbta) 2 ]Á(H 2 O) 2 } n , which performed well in terms of high adsorption properties for the congo red azo dye [19].…”