Abstract Functional materials that respond to chemical or physical stimuli through reversible structural transformations are highly desirable for the integration into devices. Now, a new stable and flexible eightfold interpenetrated three‐dimensional (3D) metal–organic framework (MOF) is reported, [Zn(oba)(pip)] n (JUK‐8) based on 4,4′‐oxybis(benzenedicarboxylate) (oba) 4‐pyridyl functionalized benzene‐1,3‐dicarbohydrazide (pip) linkers, featuring distinct switchability in response guest...

We combine experiments and simulations to study the adsorption of water in several UiO-66 frameworks (ideal defect-containing structures). propose a new set charges for that accurately provides water-structure interaction at molecular level. The is suitable predicting ideal structure, providing first time, good agreement between experimental calculated isotherms. proposed procedure tuning point framework achieve with universal can easily be extended other MOFs. explore structural...

Flexible metal–organic frameworks (MOFs) are promising materials in gas-related technologies. Adjusting the material to processes requires understanding of flexibility mechanism and its influence on adsorption properties. Herein, we present mechanistic CO2-induced pore-opening transitions water-stable MOF JUK-8 ([Zn(oba)(pip)]n, oba2– = 4,4′-oxybis(benzenedicarboxylate), pip 4-pyridyl-functionalized benzene-1,3-dicarbohydrazide) as well potential applicability gas purification. Detailed...

The two potentially tridentate and monoprotic Schiff bases acetylpyridine benzoylhydrazone (HL1) 4-tert-butylbenzoylhydrazone (HL2) demonstrate remarkable coordination versatility towards iron on account of their propensity to undergo tautomeric transformations as imposed by the metal centre. Each pyridyl aroylhydrazone ligands complexes with ferrous or ferric ion under strictly controlled reaction conditions afford three six-coordinate mononuclear compounds [FeII(HL)2](ClO4)2, [FeIIL2]...

Abstract Luminescent coordination polymers, including metal–organic frameworks, serve as a platform for optical sensing of physical and chemical stimuli, temperature or pressure the former, gases, solvent vapors, explosives, toxic species, etc. latter. The related materials built uranyl cations, UO 2 2+ , remain unexplored, despite their tunable photoluminescence. While recently, bimetallic supramolecular systems cyanido metal complexes have proven successful pathway toward...

A high proton-conducting metal–organic framework (PCMOF) is prepared for the first time by economical and environmentally-friendly mechanochemistry.

Intentionally introduced defects into solid materials create opportunities to control and tune their diverse physicochemical properties. Despite the growing interest in defect-engineered metal-organic frameworks (MOFs), there are still only a handful of studies on defective proton-conducting MOFs, including no reports two-dimensional ones. Ion-conducting fundamentally great importance development energy storage conversion devices, fuel cells batteries. In this work, we demonstrate...

Proton-conducting materials play an important role as solid electrolytes in electrochemical devices for energy storage and conversion, including proton exchange membrane fuel cells. Metal-organic frameworks (MOFs), covalent-organic (COFs) more recently hydrogen-bonded organic (HOFs) have emerged useful crystalline platforms transport that provide high conductivity enable insight into conduction pathways. Here, we present two new HOFs with conductivity, reaching 2 × 10-2 S cm-1 at 60 °C 75%...

New mixed‐linker metal–organic framework (MOF) materials incorporating both carboxylate and hydrazone linkers were prepared. The zinc‐based 3D MOFs obtained by utilizing a presynthesized aroylhydrazone [4‐pyridinecarbaldehyde isonicotinoyl (PCIH)] para ‐dicarboxylic acids [1,4‐benzenedicarboxylic acid (H 2 BDC) 4,4′‐biphenyldicarboxylic BPDC)]. Single‐crystal X‐ray diffraction revealed the interpenetrated, pillar‐layered structures of MOFs, including layers formed dicarboxylate‐bridged Zn...

Abstract A voltammetric sensor has been developed based on glassy carbon electrode (GCE) modification with nanocomposite consisting of manganese-based metal-organic framework (JUK-2), multi-walled nanotubes (MWCNTs), and gold nanoparticles (AuNPs) for detection citalopram (CIT). The composition morphology JUK-2-MWCNTs-AuNPs/GCE were characterized by X-ray powder diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), energy dispersion (EDS), scanning electron microscopy (SEM)....

Proton-conducting solids operating in both anhydrous and humid conditions are of paramount importance for the development fuel cells. We demonstrate that incorporating formamidinium or methylammonium ions CPO-27/MOF-74 metal–organic frameworks renders them highly conductive under two conditions. Highest proton conductivities reach 8 × 10–4 S/cm conditions, exceed 10–3 already at low relative humidity (30–50% RH) temperatures (25–60 °C), 10–2 60 °C 70% RH. The dense pore filling with protic...

Covalent linker transformations in metal–organic frameworks (MOFs) enable their functionalization but often suffer from low conversions or require harsh conditions, including heating, corrosive reactants and solvents, catalysts. In this work, using solvent-free mechanochemistry for the first time such conversions, we demonstrate systematic MOF pore modification with pendant hydroxyl groups resulting effects on network rigidity, its luminescent properties, as well adsorption of CO2 vapors...

Complexation of iron(III) with the heterodonor chelating agent 3,5-di-tert-butylsalicylidene benzoylhydrazine, H2(3,5-tBu2)salbh, in absence or presence a base affords complex cation [Fe{H(3,5-tBu2)salbh}2]+ neutral compound [Fe{H(3,5-tBu2)salbh}{(3,5-tBu2)salbh}], respectively, as revealed by single-crystal X-ray analyses. Such synthetic and crystallographic demonstration coordination versatility an aroylhydrazone toward iron is uncommon. The oxidation spin states have been verified...

Two structurally different polymeric complexes consisting of ruthenium(II,III) pivalate ([Ru2(piv)]4+) (Hpiv = pivalic acid) and octacyanotungstate(V) ([W(CN)8]3−) ions, [{Ru2(piv)4}3W(CN)8(H2O)] (1) (PPh4)2[Ru2(piv)4W(CN)8]·0.5H2O (2), were synthesized. The infrared spectra as well diffused reflectance confirmed the existence dimer in 1 2. X-ray crystal structure analysis 2 showed an alternating arrangement [Ru2(piv)]4+ [W(CN)8]3− ions a one-dimensional chain. temperature-dependent magnetic...

A new layered mixed-linker metal–organic framework [Zn2(iso)2(pcih)2]n (MOF) built from isophthalate ions (iso2–) and 4-pyridinecarbaldehyde isonicotinoyl hydrazone (pcih) was prepared using both solution mechanochemical methods. By use of the latter, 2D MOF is obtained either in a one-mortar three-component grinding or on way two-step mechanosynthesis. Tuning synthetic conditions allowed us to identify necessary favorable factors for solid-state formation MOF. Single-crystal X-ray...

Post-synthetic modifications of metal–organic frameworks (MOFs) enable synthesis materials with enhanced performance characteristics or those inaccessible by direct synthetic routes. In this work, for the first time, we utilize inverse-electron demand Diels–Alder (iEDDA) modification to control structural flexibility and porosity an open framework material. We selected a series dienophiles increasing bulkiness including ethyl vinyl ether (eve), cyclohexene (chx), norbornene (nor),...

We present an autonomous, chemical logic gate based on a switchable metal-organic framework (MOF) composite, containing carbon nanoparticles and Pt catalyst. The MOF composite performs as AND gate. Hydrogen oxygen gas streams serve binary inputs. Catalytically formed water induces structural transition (crystal volume expansion) of the MOF, consequence, detectable drop in conductance 'true' output only if both gases come contact with composite.

Complexation of copper(II) with a series heterodonor chelating Schiff bases (LL) salicylic acid hydrazide and aliphatic or cycloaliphatic ketones affords soluble one-dimensional (1D) metallopolymers containing as bridging ligands. Single-crystal X-ray diffraction results reveal nanometer-sized metallopolymeric wires [Cu(μ-LL)(2)](n) off-axis linkers zigzag geometry. Octahedrally coordinated copper centers, exhibiting Jahn-Teller distortion, are doubly bridged by two Schiff-base molecules in...

A 2D layered microporous isonicotinate-supported manganese(II) metal–organic framework was found to exhibit a reversible crystal-to-amorphous transformation upon the removal and uptake of certain guest molecules. Unsaturated metal centers, generated in dynamic activation, were facilitate selective adsorption CO2versus N2.

Four new layered flexible metal-organic frameworks (MOFs) containing a diacylhydrazone moiety, namely, guest-filled [Zn2(iso)2(tdih)2]n (1), [Zn2(NH2iso)2(tdih)2]n (2), [Cd2(iso)2(tdih)2]n (3) and [Cd2(NH2iso)2(tdih)2]n (4) were synthesized using terephthalaldehyde di-isonicotinoylhydrazone (tdih) as linear ditopic linker well isophtalate (iso) or 5-aminoisophthalate (NH2iso) angular colinkers. The MOFs with hexacoordinated cadmium centers feature two-dimensional pore systems compared to the...