Related Experiment Video
Updated: Jul 12, 2026
Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers
Published on: May 12, 2023
Guiding the De Novo Synthesis of Open Metal Frameworks Through Low-Symmetry Bent Linker for Hydrogen Isotope
Guo-Ying Han1, Zhiye Zhong2, Yong-Sheng Wang3
1School of Chemistry, Dalian University of Technology, Dalian, China.
Abstract:
Open metal sites (OMS) serve as crucial active sites in numerous applications, including hydrogen isotope separation, highlighting the importance of developing targeted synthesis strategies for OMS-containing frameworks. Unlike defect-engineered approaches that generate disordered OMS, synthesizing frameworks with an ordered distribution of OMS remains highly challenging yet is essential for efficient separation. Guided by the topological simplification process-which abstracts connectivity while overlooking coordination geometry-this study introduces a strategy to construct metal-organic frameworks (MOFs) with ordered OMS by reducing linker symmetry. By employing bent linkers with lower axial symmetry, rather than linear linkers of equivalent topological connectivity, OMF-2 (OMF = Open-Metal Framework) was synthesized, a pcu 8-connected framework featuring four OMS per cluster, thereby validating the approach. Remarkably, OMF-2 demonstrates exceptional hydrogen isotope separation performance, with an ideal adsorbed solution theory (IAST) selectivity of 7.7, a cryogenically programmed desorption (CPD) selectivity of 6.6, and a breakthrough test selectivity of 2.3 for D2/H2. The ordered arrangement of OMS within the pore windows enhances both chemical affinity quantum sieving (CAQS) and kinetic quantum sieving (KQS) effects. This work establishes a new pathway for the targeted synthesis of MOFs with both ordered OMS structural features and strong application potential.
More Related Videos
07:20Discovery and Synthesis Optimization of Isoreticular Al(III) Phosphonate-Based Metal-Organic Framework Compounds Using High-Throughput Methods
Published on: October 6, 2023
12:30Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework
Published on: April 9, 2018
Related Concept Videos
02:17Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
02:24Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
02:13Reduction of Alkenes: Catalytic Hydrogenation
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the surface of...