Crystalline central-metal transformation in metal-organic frameworks

Reversible Structural Transformations of Metal–Organic Frameworks as Artificial Switchable Catalysts for Dynamic Control of Selectively Cyanation Reaction

“…[19][20][21][22][23][24][25][26][27] Ta king advantage of their frequently occurring reversible structural transformations, through single-crystal to single-crystal processes,t he uniquef lipping motion between structurala nd topologyc onnectionsa re similart oe ach otherm akes MOFs a highly appropriate choice for building molecular devices,s uch as switching or sensing materials. [28][29][30][31][32] Meanwhile,s olvent-induced dissolution-exchange-crystallization behavior is another important,but difficult, approach to regulating reversible structural transformations because the connection modesb etween metal ions and ligandsa re very difficult to re-edit. [30] Furthermore, the coordination geometry of the catalytic sites, size of the channels, and electronegativity of the frameworks in MOFbased dissolution-exchange-crystallization processes are more easily realized, resulting from the fact that their controllable structural transformationb ehavior can switch on/off the catalytic activity of molecular catalysts.…”

“…[28][29][30][31][32] Meanwhile,s olvent-induced dissolution-exchange-crystallization behavior is another important,but difficult, approach to regulating reversible structural transformations because the connection modesb etween metal ions and ligandsa re very difficult to re-edit. [30] Furthermore, the coordination geometry of the catalytic sites, size of the channels, and electronegativity of the frameworks in MOFbased dissolution-exchange-crystallization processes are more easily realized, resulting from the fact that their controllable structural transformationb ehavior can switch on/off the catalytic activity of molecular catalysts. [33][34][35][36] Moreover,t om imic the actions of channel enzymes, particular effort has been dedicated to adjusting and controlling reversible structuralt ransformations of heterogeneous catalysts to discern the molecular structureo fs timuli-controlled processes, to provide information on am ore distinct catalytic mechanism and richer perspectiveo nt he functionalp erformances to illuminate fundamental manmade catalytic chemistry.…”

Two‐Dimensional MOF and COF Nanosheets: Synthesis and Applications in Electrochemistry

“…Recently, given that traditional bulk MOFs/COFs cannot fully meet the requirements of many special applications (especially in biological related applications, small‐size MOFs/COFs are needed to promote the internalization into cells), the preparation of MOF/COF nanocrystals with controllable size, shape and morphology has become a new challenge . Affected by the above research, a large number of studies on 2D MOFs/COFs have been published, mainly focusing on the exploration and optimization of the synthetic route .…”

Metal–Organic Framework (MOF)‐Based Materials as Heterogeneous Catalysts for C−H Bond Activation

“…[20] MOFs, also called porousc oordination polymers (PCPs) or porousc oordination networks (PCNs), represent ac lass of crystalline materials built from the rational combination of various organic linkersa nd metal ions/clusters( also known as secondary buildingu nits, or SBUs), which imparts tunable functionality andd esignable topology. [21][22][23][24] The vast number of organic linkers and metal ions/clusters linked by means of coordination bonds as wella st heir diversea ssemblies has led to more than 20 000 MOFs being reported, the structures of which are not only abundant and intriguing but also designable andt ailorable. [25][26][27] In addition, MOFs possess uniform pore sizes/environments and unparalleled surfacea reas in contrast to traditional microporous and mesoporousm aterials, including zeolite, SiO 2 ,a nd activated carbon.…”