Postsynthetic Metalation of Bipyridyl-Containing Metal–Organic Frameworks for Highly Efficient Catalytic Organic Transformations

Iridium–bipyridine periodic mesoporous organosilica catalyzed direct C–H borylation using a pinacolborane

Iridium complex fixed on periodic mesoporous organosilica containing bipyridine ligands within a framework showed efficient heterogeneous catalysis for direct C–H borylation of arenes and heteroarenes in combination with an inexpensive pinacolborane.

Turn-on luminescence based discrimination of protic acids using a flexible layered metal–organic coordination polymer

A flexible layered metal–organic coordination polymer used as probe for turn-on luminescence based discrimination of protic acids and amino acids.

Comparative study of titanium-functionalized UiO-66: support effect on the oxidation of cyclohexene using hydrogen peroxide

Support effect in UiO-66 with Ti^IV as part of nodes, attached to nodes, and on organic linkers is reported.

Visible detection of explosive nitroaromatics facilitated by a large stokes shift of luminescence using europium and terbium doped yttrium based MOFs

Two lanthanide doped highly luminescent MOFs have been synthesized and characterized. The MOFs are highly efficient for the detection of trace amount of explosive nitroaromatics by visible colour change.

Highly thermostable lanthanide metal–organic frameworks exhibiting unique selectivity for nitro explosives

The solvent-free Eu-MOF with high red emission intensity and the microporous instinct exhibits high sensitivity for 2,4,6-trinitrophenol with K_sv constant 6.24 × 10⁴ M⁻¹.

Functionalising metal–organic frameworks with metal complexes: the role of structural dynamics

The impact of dynamics in the functionalisation of metal–organic framework UiO-67 with an Ir-complex has been studied. Highly functionalised Ir-UiO-67 can be only trapped as kinetic products, which lose metals and exchange species to gain stability.

Synthesis and click modification of an azido-functionalized Zr(iv) metal–organic framework and a catalytic study

A new azido-functionalized Zr(iv) MOF was synthesized and further functionalized via post-synthetic click reactions, and the amino-tagged MOF is a base catalyst for Knoevenagel condensation.

Solvent-free heterogeneous catalysis for cyanosilylation in a dynamic cobalt-MOF

The terminal coordinated water molecule has been successfully removed in a butterfly-like cobalt cluster based 3D frameworks by SCSC transformation, which can efficiently heterogeneous catalyze cyanosilylation of aldehydes and exhibit size-selectivity effect under solvent-free conditions.

Graphene-immobilized monomeric bipyridine-Mx+ (Mx+ = Fe3+, Co2+, Ni2+, or Cu2+) complexes for electrocatalytic water oxidation

Covalent anchoring of 2,2'-bipyridine (L) to a graphene (Gr) modified electrode followed by treatment with an M(x+)(NO3)x solution (M = Fe(3+), Co(2+), Ni(2+), or Cu(2+)) results in surface-bound catalysts with high redox activity in neutral water at ambient temperature. Raman and IR spectroscopies indicate the successful L grafting and Gr deposition onto the electrodes, whereas metal concentration was determined by inductively coupled plasma mass spectrometry (ICP-MS). Cyclic voltammetry measurements were used to investigate catalytic performances, whereas a rotating ring-disk electrode was used to measure the faraday efficiencies of oxygen evolution reaction and determine experimental turnover frequencies (TOFs). Of the four metal-L complexes investigated, Co-L on a Gr-modified indium tin oxide (ITO) electrode exhibits the best catalytic activity. Washing with a solution containing catalytically inert Zn(2+) removes Co weakly bound by surface carboxylate functionalities, and ensures the presence of only covalently attached active catalytic species. This process results in an experimental TOF of 14 s(-1) at an overpotential of 834 mV. Functionalization of Gr-modified electrodes with appropriate metal-binding moieties thus provides a feasible strategy for loading first row transition metals onto conductive surfaces for the generation of highly active water oxidation catalysts.

A metal-organic framework containing unusual eight-connected Zr-oxo secondary building units and orthogonal carboxylic acids for ultra-sensitive metal detection

Two metal-organic frameworks (MOFs) with Zr-oxo secondary building units (SBUs) were prepared by using p,p'-terphenyldicarboxylate (TPDC) bridging ligands pre-functionalized with orthogonal succinic acid (MOF-1) and maleic acid groups (MOF-2). Single-crystal X-ray structure analysis of MOF-1 provides the first direct evidence for eight-connected SBUs in UiO-type MOFs. In contrast, MOF-2 contains twelve-connected SBUs as seen in the traditional UiO MOF topology. These structural assignments were confirmed by extended X-ray absorption fine structure (EXAFS) analysis. The highly porous MOF-1 is an excellent fluorescence sensor for metal ions with the detection limit of <0.5 ppb for Mn(2+) and three to four orders of magnitude greater sensitivity for metal ions than previously reported luminescent MOFs.

A 3-D diamondoid MOF catalyst based on in situ generated [Cu(L)2] N-heterocyclic carbene (NHC) linkers: hydroboration of CO2

A new MOF, [Zn₄O{Cu(L)₂}₂], with 14 Å channels lined by in situ generated [Cu(L)₂] N-heterocyclic carbene linkers catalyses the hydroboration of CO₂.

Straightforward installation of carbon–halogen, carbon–oxygen and carbon–carbon bonds within metal–organic frameworks (MOF) via palladium-catalysed direct C–H functionalization

The straightforward C–H functionalization of UiO-67-dcppy materials was achieved by a palladium catalysed activation with high conversion and good regioselectivity.

Syntheses, crystal structures, photoluminescent/magnetic properties of four new coordination polymers based on 2,3′,4,5′-biphenyltetracarboxylic acid

Complex 1 is a (4,10)-connected deh1 net. Both complexes 2 and 4 exhibit (4,4)-connected mog moganite nets and novel (3,4,4)-connected networks respectively. Complex 3 is a 3D supermolecular net assembled by 1D anionic chains and cationic chains.