Visible Light Stimulated Bistable Photo-Switching in Defect Engineered Metal-Organic Frameworks.

The incorporation of photoactive donor-acceptor Stenhouse adduct (DASA) moieties into Metal-Organic Frameworks (MOFs) provides a new route to the development of visible light switching materials. Herein, a DUT-5 mixed-linker defect series was exploited to produce a derivative group of DASA-modified materials via postsynthetic modification (PSM). The photoactive MOFs exhibited conversion stimulated by visible wavelengths and were stable following multiple cycles.

A Metal-Organic Framework Based on a Nickel Bis(dithiolene) Connector: Synthesis, Crystal Structure, and Application as an Electrochemical Glucose Sensor.

Functionalizing the redox-active tetrathiafulvalene (TTF) core with groups capable of coordination to metals provides new perspectives on the modulation of architectures and electronic properties of organic-inorganic hybrid materials. With a view to extending this concept, we have now synthesized nickel bis(dithiolene-dibenzoic acid), [Ni(CS(CHCOOH))], which can be considered as the inorganic analogue of the organic tetrathiafulvalene-tetrabenzoic acid (HTTFTB). Likewise, [Ni(CS(CHCOOH))] is a redox-active linker for new functional metal-organic frameworks, as demonstrated here with the synthesis of [Mn{Ni(CS(CHCOO))}(HO)]·2DMF, (, DMF = -dimethylformamide).

Linking defects, hierarchical porosity generation and desalination performance in metal-organic frameworks.

Composite membranes with defective metal-organic frameworks (MOFs) connect the emerging fields of MOF topological modification, MOF-polymer interfacial engineering and composite material functionalization. Although defective MOFs can be fabricated thermal or chemical treatment, the relationship between hierarchical MOF structure and their performance in a polymeric membrane matrix has so far not been investigated. Here we show how a modulator fumarate-based MIL-53(Al) microwave synthesis process results in defective MOFs.