Themed collection Coordination Networks

Dynamic macroscopic behaviour of single crystals of coordination polymers when subjected to light, heat, and mechanical force.

Pentazole is a good nitrogen-donor ligand to prepare intriguing structures. Herein, the synthesis and crystal structures of all reported metal pentazolate salts were summarized and the future prospects in this field were also discussed.

Research progress on cobalt-based metal–organic frameworks as functional materials for battery applications has been presented.

The use of deep eutectic solvents (DES) as media for the preparation of metal- and covalent organic frameworks (MOFs and COFs) and their post-synthetic modification towards composites is reviewed.

Coordination polymers with molecular recognition sites are assembled using cyclotriveratrylene ligands. Many show differential guest-spaces with host and lattice sites available, however common host–guest and self-inclusion motifs can block sites.

Metal–organic frameworks host many types of compositional and structural disorder. In this Highlight article we explore cases where this disorder is correlated, rather than random.

This highlight summarises the previously reported MOF-on-MOF systems, with a focus on the presented crystallographic information and classification of the systems according to lattice parameter matching.

The application of metal–organic frameworks (MOFs) to diverse chemical sectors is aided by their crystallinity, which permits the use of X-ray crystallography to characterise their pore chemistry and provides invaluable insight into their properties.

Through an anion exchange strategy, the post-synthetic cationic metal–organic frameworks present better electrocatalytic performances during the hydrogen evolution reaction process than the pristine one.

Two MOFs based on [WS₄Cu₄]²⁺ or unprecedented [WS₄Cu₆]⁴⁺·I⁻·[WS₄Cu₆]⁴⁺, and a MOF based on [MoS₄Cu₄]²⁺ with 9,10-di(pyridin-4-yl)anthracene were obtained. Temperature was important for the isomerization of [WS₄Cu_x]^x−2 in the formation of two MOFs based on [WS₄Cu_x]^x−2.

The first coordination polymer of a polyoxometalate bi-functionalized by phosphonate and lanthanoid groups forms when {Ce^III₂(α₂,-P^V₂W^VI₁₆O₆₀)L₂} units are joined by direct inter-cluster Ce–OW bonds into 1D chains.

A novel Zn(II)–organic framework with 1D stair-like structure displays reversible photochromic and redox active properties. And inter-ligands charge-transfer interactions exist in this material.

The two isomeric zeolite-like metal–organic frameworks based on tetrahedral TPO³⁻ ligands and tetrahedrally connected Cd²⁺ ions were prepared. One of the compounds shows mechanic-responsive luminescence after the crystals were ground for different time.

The coordination cluster [Na₂Fe₁₀O₆(OH)₄(isobutyrate)₁₄(MeO)₂(MeCN)₂], derived from a {Fe₃(μ₃-O)(isobutyrate)₆} precursor, features a cluster shell of corner-sharing {Fe₃(μ₃-O)} motifs, capped by two sodium ions.

The hierarchical assembly of 3D-polyoxovanadate frameworks using host–guest interactions is reported.

ATN-[Zn(Im)₂] is the first known example of a ZIF exhibiting a zeolitic ATN topology, which was prepared using the cooperative effects of N,N-dipropylformamide and n-butylamine.

The formation of a donor–acceptor structure in a coordination polymer results in a long room temperature phosphorescence lifetime (40.22 ms) three orders of magnitude higher than that of pristine phosphor.

Ln-MOFs with open metal active sites and Lewis basic nitrogen atoms show highly sensitive sensing of nitrobenzene and remarkable separations of C₂H₂–CH₄/CO₂–CH₄.

A rare hybrid of a 3D Sn–Se type framework and a ruthenium(II) photosensitizer has been synthesized, and exhibits visible light photocurrent response.

A novel 3D coordination polymer has been assembled using cationic trigonal {Cu^II₃} nodes connected by 1,2,4,5-benzenetetracarboxylato spacers.

A triangular Mn^III₃-based 2D framework exhibiting SMM properties was achieved by tuning the topological arrangement of cluster units and the intra-unit parameters through the linkage of diamagnetic Na(I) ions.

Based on the organic ligand 1,1′-(1,6-hexanediyl)bis[2-(2-pyridyl)benzimidazole], two new Co(II)-based complexes were successfully synthesized hydrothermally, and they are promising sensors for detecting acac, LEV, and Ni²⁺ ions.

I₂@MOF-808 was prepared to investigate the amount of I₂ adsorbed on MOF-808. By antibacterial tests, it was also confirmed that it could be considered as a biocide without the problem of microbial resistance and instability of iodine.

This study reports four SMMs based on silanolate or stannanolate ligands cis-[Dy(OSiPh₃)₂(THF)₄][BPh₄]·THF·C₆H₆ (1), cis-[Dy(OSnPh₃)₂(THF)₄][BPh₄]·THF·C₆H_6·C₆H₁₄ (2), fac-[Dy(OSiPh₃)₃(THF)₃]·THF (3) and fac-[Dy(OSiPh₃)₃(bipy)(THF)]·THF (4).

A 2D MOF displays high performance luminescence quenching for detecting Fe³⁺ and Cu²⁺ in pure water, actual river water and simulated HEPES with superior low LODs. Multiple experiments and DFT calculations co-verify a weak interaction quenching mechanism.

Counter-ions can regulate the luminescence of complexes by changing the weak intermolecular interactions, which can be observed by THz spectroscopy.

Field-induced slow relaxation in dysprosium amino-bis(benzotriazole) phenolate complexes.

A new multi-functional metal–organic framework {[Cu₂(HL)(H₂O)₂]·NMP·2H₂O}_n was synthesized. It shows efficient catalytic performance for the chemical fixation of CO₂ and exhibits selective sorption towards the rhodamine B dye.

Eight new Zn(II)/Cd(II) coordination polymers constructed from a naphthalene-amide-pyridyl ligand and various carboxylates were synthesized and characterized, which show multifunctional fluorescence responses for cations, anions and antibiotics.

Eight novel 1D-MOMN's with different topologies were obtained from the self-assembly of M(II) (M: Cu, Co, Cd, Zn), ancillary nitrogen ligands and bridging 1,1′-ferrocenedicarboxylate anions and characterized by X-ray diffraction techniques.

The electronic, adsorption and structural properties of a layered coordination polymer formed with 3,4-pvb⁻ and copper(II) were studied.

The oxygen atom of the MOF ether-bridging group acts as a Lewis base site, improving the connection and allowing the detection of 10 antibiotics through the fluorescence quenching effect.

A new fluorescent MOF can detect Al³⁺ ions with high selectivity and sensitivity via turn-off effect and emission color change.

A new type of multipolar rare earth molecular ferroelectric: ((nBu)₄N)₃[Ce(NO₃)₄(SCN)₂] (BuCH₃CH₂CH₂CH₂)₄N), undergoes a high-temperature ferroelectric phase transition, possesses flexible switchable SHG effect, moderate spontaneous polarization and a narrow band gap.

Assisted by ultrasound waves, a Sc-based coordination polymer CP 1 was synthesized successfully. With 1 as the precursor, another stable CP 2 can be obtained by single-crystal to single-crystal transformation and 2 exhibited good catalytic activities.

An unusual tryptophan coordination mode with copper(II) wherein L-tryp is coordinated through the carboxylate and amine groups. A heterogeneous catalyst for the Suzuki cross-coupling reaction with ∼98% yield under normal reaction conditions.

We designed two synthetic strategies using identical ligands to construct six POM-based complexes. These complexes can act as amperometric sensors for the detection of Cr(VI), Fe(III) and H₂O₂ and fluorescence sensors for sensing Cr³⁺.

Three new ferrocene-functionalized thiazolidine-2-thione coinage metal coordination polymers with halides and pseudo-halides were synthesized and the nature of their weak interactions was assessed.

Two Pb(II) coordination polymers (CPs) isolated and show 2D-sheet-like structures. CPs with the formate, undergoes solid-state photodimerization and displays blue emission. While 2D sheet with acetate is photostable and show white-light emission.

A 3D Eu(III)-based metal–organic framework has been synthesized as a multiresponsive chemosensor for highly sensitive and selective detection of Fe³⁺, Cr₂O₇²⁻ and amines in water.

A photochromic cationic MOF with one-dimensional channels was prepared based on a π-conjugated electron-deficient viologen, which exhibits high uptake capacity for Cr₂O₇²⁻ through ion-exchange and controllable iodine adsorption behavior.

Four Co-MOFs involving R-isophthalic acid and n-TBT ligands have been synthesized and structurally characterized. Co-MOF-4 exhibits excellent catalytic performance for the oxidative coupling reaction under solvent-free condition and an air atmosphere.

A novel two-dimensional coordination polymer {[(CH₃)₂NH₂][Zn₂(L)₂]·DMF}_n was synthesized. It exhibits good selective adsorption for CO₂; moreover, it shows high selectivity and sensitivity for NB and Cr₂O₇²⁻ ions.

[RuGa]@NU-1000 shows enhanced adsorption of SO₂, specially at low pressures (10⁻³ bar) even when compared with other materials employing more expensive precious metals.

Two mixed ligand Cd(II) coordination polymers have been synthesized using three methods by in situ decarboxylation of phenylmalonic acid. CPs were screened for their antibacterial activities and the influence of structural properties was studied.

The reversible structural transformation upon proton delivery and removal in Co(II) coordination polymers can be ascribed to the various bonding modes and the flexibility of the spacer ligands.

Two copper MOFs based on carboxamide linkers are presented. This work shows how organometallic complexes with carboxylate functionalities can be repurposed to produce crystalline MOFs which can be used in carbon dioxide conversion.

Two CPs display excellent sensitivity, selectivity and low limits of detection for detection of LEV, BZH and Fe³⁺ ions.

A series of Ag⁰-doped Ag(I)organic frameworks have been constructed via a facile self-photoreduction strategy and can be applied as efficient photocatalysts for the photocatalytic degradation of methyl orange.

2,2′:6′,2′′-Terpyridine-4′-carboxylate (tpyc⁻) forms both homo- and heterometallic uranyl ion complexes including a chiral, twofold interpenetrated polymer involving the “expanded ligand” Ni(tpyc)₂.

A 3D anionic, porous MOF exhibits selective adsorption of cationic dyes and can be used as a fast-response fluorescence sensor for the detection of Fe³⁺ ions by Tb³⁺ ion encapsulation.

Three multidimensional Co-polymers were obtained. Co-1 exhibits as a 2D layer. Co-2 displays as a tetranodal (4,4,5,6)-connected 3D MOFs. Co-3 is a binodal (4,6)-connected 3D framework.

Using the electrochemical synthesis and varying the solvents used, the amounts and ratios of starting reagents and the crystallization temperature, single crystals of new 1-D, 2-D and 3-D copper(I)-chloride salts of diprotonated dabco were prepared.

Double-walled pyridylbenzoate MOFs display an order/disorder phase transition on solvation/desolvation. This allows the MOFs to retain structural integrity over multiple sorption cycles.

Cluster-based complexes 1 and 2 with [Cu₆I₅] and [Cu₈I₈] polynuclear motifs were constructed via a conformation-adaptive self-assembly strategy, respectively. Two Cu(I) complexes exhibited photocatalytic activity to the CuAAC reaction in water solution.

Six coordination polymers based on Mn(II) and V-shaped ligand were successfully isolated and their dielectric as well as magnetic behaviours were investigated. The paper also discusses the growth of solids in terms of supramolecular aggregation.

Two novel Ln-MOFs containing uncoordinated Lewis basic sites for sensitive detection of Fe³⁺ ions and nitrobenzene through fluorescence quenching.

Two Cd(II) coordination polymers derived from a Y-shaped tricarboxylate ligand were synthesized and their photocatalytic properties against decomposition of methylene blue were investigated experimentally and computationally.

A Zn(II) material based on thiophenedicarboxylate and viologen derivative mixed ligands is synthesized. Thanks to pyridinium unit embedded in its structure, the material exhibits a rapid photochromic response via sunlight irradiation.

A Cu(II)-based MOF has been synthesized by the in situ cleavage and rearrangement solvothermal synthesis. This material exhibits highly stabilities and CO₂ adsorption ability to catalyze cycloaddition of CO₂ with epoxides efficiently.

Novel Mo(VI) hydrazonato octamolybdate and hexamolybdate hybrids have been synthesized and structurally characterized. Quantum chemical calculations have been applied to determine the possibility of developing the covalently anchored hybrids.

A 3D pillar-layered cobalt(II) CP with a 3D (4,6)-connected {4⁴·6¹⁰·8}{4⁴·6²} fsc net was designed and it showed great potential as an electrocatalyst in the overall water splitting and as a chemosensor for Cr(VI) anion detection.

Two coordination polymers are designed in order to exploit them for the separation of cationic and anionic dyes effectively and rapidly.

A 3D fsx-type thermostable MOF was designed and synthesized for the highly selective detection of Fe³⁺ ions and ten nitroaromatic explosives.

A water stable open-framework zirconium(IV) phosphate (ZrP) has a low anhydrous proton conductivity of 7.73 × 10⁻⁷ S cm⁻¹ at 220 °C, and a water assisted high proton conductivity of 4.41 × 10⁻² S cm⁻¹ at 60 °C and 98% RH.

Two cluster-based metal–organic frameworks have been synthesized—one exhibits highly selective fluorescent detection of trace Hg²⁺ and the other shows antiferromagnetic interactions between Mn³⁺ ions.

The study of porous materials under high-pressure conditions is crucial for the understanding and development of structure–property relationships.

Two novel hydroxamic acids have been used in constructing two 1-D coordination polymers. Slight structural differences promote connectivity changes upon Cu(II) metalation as rationalised using DFT calculations and Hirschfeld surface analysis.

Two new Cd-based LMOFs (MOF-1 and MOF-2) were prepared with good photoluminescence properties. MOF-2 exhibits high sensitivity in detecting Fe³⁺ with a very large quenching coefficient of 27 027 M⁻¹. It has potential application in the chemical sensing of CrO₄²⁻ and Cr₂O₇²⁻.

Five novel MOFs with various dimensions designed as high-efficiency electrocatalysts for oxygen evaluation reactions.