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Areas & Topics

Decoding the Biomimetic Mineralization of Metal–Organic Frameworks in Water【ACS Nano 2024, 18 (36), 25170–25182】

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This study deciphers the green synthesis mechanism of ZIF-8 by tracking proton transfer in water. Using in situ X-ray scattering, multiscale simulations, and quantum calculations, we identify a three-stage crystallization process:

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(I) imidazole replaces water in zinc cages, triggering proton transfer and forming amorphous nuclei;

(II) nuclei transform into crystalline structures through a rate-limited process;

(III) stable crystallites form via temperature-dependent equilibrium at the crystal–solution interface. Additionally, protein additives like pepsin and lysozyme influence ZIF-8 morphology and encapsulation via their proton transfer properties.

These insights advance understanding of biomimetic MOF mineralization.

Phase-transformable metal-organic polyhedra for membrane processing and switchable gas separation【Nat Commun 2024, 15, 9523.】

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This study presents metal-organic polyhedra (MOPs) capable of reversible transitions between liquid, glass, and crystal phases while retaining microporosity. Using a modular synthesis, we combine porous MOP cores with phase-controlling polymers. This design enables tunable gas separation membranes, where switching phases adjusts CO₂/H₂ selectivity and permeability—outperforming many conventional porous membranes.

Arrayed Pt Single Atoms via Phosphotungstic Acids Intercalated in Silicate Nanochannels for Efficient Hydrogen Evolution Reactions【ACS Nano, 2024,18( 2), 1611–1620】

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We report a strategy to array single Pt atoms (Pt₁) within hexagonally packed silicate nanochannels using phosphotungstic acids (PTA) as templates, achieving high Pt loading (~3.0 wt%). Characterization and DFT calculations reveal that Pt atoms are stabilized via four-oxygen coordination on PTA, with reduced adsorption energy preventing clustering. By tuning the Pt/PTA ratio, dispersion or clustering can be controlled. The resulting 3D-organized Pt₁–PTA system shows exceptional photocatalytic hydrogen production (~300 mmol/h/gPt), doubling the best-known efficiency in polyoxometalate-based systems.

Conputational Chemical Dynamics of Metallo Carbene Olefin Metathesis

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1.  “Carbene Rotamer Switching Explains the Reverse Trans Effect in Forming the Grubbs Second-Generation Olefin Metathesis Catalyst” Organometallics, 2011, 30, 4196.

(This work was also reported by Science Editors’ Choice highlight [Science, 2011, 333, 500] and

[C & E News, 2011, 89, 39] )

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