A self-catenated network containing unprecedented 0D + 2D → 2D polycatenation array

Ten polytorsional-amide-induced helical-based coordination polymers with difunctional electrochemical activities

Ten polytorsional-naphthalene-amide-based CPs constructed from different carboxylates and metal ions were obtained and exhibited difunctional electrochemical activities.

Metal/Carboxylate-Induced Versatile Structures of Nine 0D → 3D Complexes with Different Fluorescent and Electrochemical Behaviors

To investigate the effect of the polycarboxylates and metal ions on the assembly and structures of complexes based on a thiophene-containing bis-pyridyl-bis-amide N,N'-bis(pyridine-3-yl)thiophene-2,5-dicarboxamide (3-bptpa) ligand, nine 0D → 3D complexes of [Ni₂(3-bptpa)₄(1,2-BDC)₂(H₂O)₂] (1), [Ni(3-bptpa)(IP)(H₂O)₂]·H₂O (2), [Ni(3-bptpa)(5-MIP)(H₂O)₂]·H₂O (3), [Ni(3-bptpa)(5-NIP)(H₂O)] (4), [Ni(3-bptpa)(5-AIP)]·2H₂O (5), [Ni₂(OH)(3-bptpa)(1,3,5-BTC)]·DMA·5H₂O (6), [Cu(3-bptpa)(5-MIP)]·3H₂O (7), [Cu(3-bptpa)(5-AIP)(H₂O)_0.25]·H₂O (8), and [Cu(3-bptpa)(1,3,5-HBTC)] (9) (1,2-H₂BDC = 1,2-benzenedicarboxylic acid, H₂IP = 1,3-benzenedicarboxylic acid, 5-H₂MIP = 5-methylisophthalic acid, 5-H₂NIP = 5-nitroisophthalic acid, 5-H₂AIP = 5-aminoisophthalic acid, DMA = N,N'-dimethylacetamide, and 1,3,5-H₃BTC = 1,3,5-benzenetricarboxylic acid) have been hydrothermally/solvothermally synthesized and structurally characterized by IR, thermogravimetric, powder X-ray diffraction, and single-crystal X-ray diffraction. Complex 1 is a zero-dimensional (0D) bimetallic complex. Complexes 2 and 3 feature two similar one-dimensional ladderlike structures. Complex 4 displays a two-dimensional (2D) 4-connected network based on single-metallic nodes. Complex 5 shows a 2D double-layer structure containing a pair of 6³ [Ni(5-AIP)] honeycomblike sheets. Complex 6 is a 3,5-connected three-dimensional (3D) framework derived from bimetallic nodes and 6³ [Ni₂(OH)(1,3,5-BTC)] honeycomblike sheets. Complex 7 displays a 2D 4-connected grid based on bimetallic nodes. Complex 8 features a 2D double-layer structure based on two 4-connected [Cu(3-bptpa)(5-AIP)] sheets and bridging coordinated water molecules. Complex 9 is a 2D structure extended by incomplete deprotonation of 1,3,5-HBTC and 3-bptpa linkers. The effect of the metal ions and polycarboxylates on the structures of the title complexes was discussed, and the fluorescent properties of 1-9 were investigated. The carbon paste electrodes bulk-modified by complexes 3, 5, and 6-9 show different electrocatalytic activities for the oxidation of ascorbic acid as well as the reduction of hydrogen peroxide, nitrites, and bromates.

Versatile carboxylate-directed structures of ten 1D → 3D Ni(ii) coordination polymers: fluorescence behaviors and electrochemical activities

Ten 1D → 3D Ni(ii) coordination polymers based on a phenyl/methylene-mixed-bridged ligand have been obtained and structurally directed by carboxylates; they show different fluorescence behaviors and electrochemical activities.

Polycarboxylate-directed semi-rigid pyridyl-amide-based various NiII complexes: electrochemical properties and enhancements of photocatalytic activities by calcination

Four different pyridyl-amide-based Ni-complexes were synthesized by tuning polycarboxylates, displaying bifunctional electrocatalytic properties and enhancements of photocatalytic activities by calcination.

Syntheses, structural diversities and characterization of a series of coordination polymers with two isomeric oxadiazol-pyridine ligands

In this work two positional-isomeric oxadiazol-pyridine ligands 3-(5-methyl-1,3,4-oxadiazol-2-yl)pyridine (L₁) and 4-(5-methyl-1,3,4-oxadiazol-2-yl)pyridine (L₂) have been designed and synthesized.

A series of pyridyl-amide-based ZnII/CdII coordination polymers and their polypyrrole-functionalized composite materials for tuning their photocatalytic properties

Six pyridyl-amide-based Zn^II/Cd^II coordination polymers have been solvothermally synthesized and decorated by polypyrrole for tuning their photocatalytic properties under visible irradiation.

The assembly of thiophene-based bis-pyridyl-bis-amide CoII coordination polymers and their polypyrrole-functionalized hybrid materials for boosting their photocatalytic performances

A series of thiophene-based bis-pyridyl-bis-amide coordination polymers have been synthesized and decorated with polypyrrole for boosting their photocatalytic properties under visible light irradiation.

Thermodynamically stable MOF showing a highly rare four-connected hxg-d-4-Cccm net with self-penetration, polyrotaxane, and polycatenane multi-features

Herein, we report the first case of MOFs showing the coexistence of self-penetration, polyrotaxane, and polycatenane multi-features.

Synthesis, structure and luminescence properties of two new acylamide metal-organic frameworks showing 4-connected CdSO₄ and a threefold interpenetrating dia net

Two new acylamide metal-organic frameworks (MOFs), based on mixed N- and O-donor ligands, with 4-connected topologies have been obtained, namely poly[[μ2-N(1),N(4)-bis(pyridin-3-yl)terephthalamide]bis(μ3-4,4'-oxydibenzoato)dizinc(II)], [Zn2(C14H8O5)2(C18H14N4O2)]n, (1), and poly[[(μ2-benzene-1,4-dicarboxylato)[μ2-N(4),N(4')-bis(pyridin-3-yl)-[1,1'-biphenyl]-4,4'-dicarboxamide]dicadmium(II)] dihydrate], {[Cd(C8H4O4)(C24H18N4O2)]·2H2O}n, (2). Complex (1) is a 4-connected CdSO4 net with no interpenetration, where the Zn(II) cation is regarded as a 4-connecting node with square geometry. Complex (2) is a 4-connected dia net with threefold interpenetration, where the Cd(II) cation acts as a 4-connecting node with tetrahedral geometry. The results of thermogravimetric and luminescence analyses are described in detail.

Structure and magnetic properties of a mixed-ligand copper(II) complex

The hydrothermal synthesis of the novel complex poly[[μ2-N(1),N(4)-bis(pyridin-3-yl)naphthalene-1,4-dicarboxamide-κ(2)N(3):N(3')](μ4-phthalato-κ(4)O(1):O(1):O(1'):O(2'))copper(II)], [Cu(C8H4O4)(C22H16N4O2)]n, is described. With the phthalate ligand connecting neighbouring Cu(II) cations, an infinite one-dimensional chain is formed. Adjacent one-dimensional chains are connected by the dicarboxamide ligand, forming an intriguing two-dimensional framework. The magnetic properties and thermal stability of this complex are also described.

A novel two-dimensional metal-organic supramolecular framework including π-π stacking and hydrogen-bond interactions

[μ-N,N'-Bis(pyridin-3-yl)benzene-1,4-dicarboxamide-1:2κ(2)N:N']bis{[N,N'-bis(pyridin-3-yl)benzene-1,4-dicarboxamide-κN]diiodidomercury(II)}, [Hg2I4(C18H14N4O2)3], is an S-shaped dinuclear molecule, composed of two HgI2 units and three N,N'-bis(pyridin-3-yl)benzene-1,4-dicarboxamide (L) ligands. The central L ligand is centrosymmetric and coordinated to two Hg(II) cations via two pyridine N atoms, in a syn-syn conformation. The two terminal L ligands are monodentate, with one uncoordinated pyridine N atom, and each adopts a syn-anti conformation. The HgI2 units show highly distorted tetrahedral (sawhorse) geometry, as the Hg(II) centres lie only 0.34 (2) or 0.32 (2) Å from the planes defined by the I and pyridine N atoms. Supramolecular interactions, thermal stability and solid-state luminescence properties were also measured.

A one-dimensional zinc(II) coordination polymer incorporating [1,1'-biphenyl]-4,4'-dicarboxylate and N,N'-bis(pyridin-3-ylmethyl)-[1,1'-biphenyl]-4,4'-dicarboxamide ligands

In the title compound, catena-poly[[[N,N'-bis(pyridin-3-ylmethyl)-[1,1'-biphenyl]-4,4'-dicarboxamide]chloridozinc(II)]-μ-[1,1'-biphenyl]-4,4'-dicarboxylato-[[N,N'-bis(pyridin-3-ylmethyl)-[1,1'-biphenyl]-4,4'-dicarboxamide]chloridozinc(II)]-μ-[N,N'-bis(pyridin-3-ylmethyl)-[1,1'-biphenyl]-4,4'-dicarboxamide]], [Zn2(C14H8O4)Cl2(C26H22N4O2)3]n, the Zn(II) centre is four-coordinate and approximately tetrahedral, bonding to one carboxylate O atom from a bidentate bridging dianionic [1,1'-biphenyl]-4,4'-dicarboxylate ligand, to two pyridine N atoms from two N,N'-bis(pyridin-3-ylmethyl)-[1,1'-biphenyl]-4,4'-dicarboxamide ligands and to one chloride ligand. The pyridyl ligands exhibit bidentate bridging and monodentate terminal coordination modes. The bidentate bridging pyridyl ligand and the bridging [1,1'-biphenyl]-4,4'-dicarboxylate ligand both lie on special positions, with inversion centres at the mid-points of their central C-C bonds. These bridging groups link the Zn(II) centres into a one-dimensional tape structure that propagates along the crystallographic b direction. The tapes are interlinked into a two-dimensional layer in the ab plane through N-H···O hydrogen bonds between the monodentate ligands. In addition, the thermal stability and solid-state photoluminescence properties of the title compound are reported.