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Related Concept Videos

Properties of Organometallic Compounds01:23

Properties of Organometallic Compounds

Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.

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Synthesis and Characterization of Functionalized Metal-organic Frameworks
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Published on: September 5, 2014

Carboxylate-Driven Metal Pre‑Fixation COF@MOF Synthesis: Enabling Tailored Structural, Dimensional, and Defect

Ying Zhao1,2, Dongmei Chen2, Huilin Zheng2

  • 1State Key Laboratory of Agricultural Microbiology Core Facility, Huazhong Agricultural University, Wuhan, Hubei, China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|June 18, 2026
PubMed
Summary

A new metal pre-fixation (MPF) strategy enables controllable synthesis of covalent-organic framework (COF) and metal-organic framework (MOF) composites. These COF@MOF materials show improved gas separation and catalytic performance.

Keywords:
CH4/C2H6/C3H8 separationH2O2 activationhierarchical COF@MOFmetal pre‐fixation

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemical Engineering

Background:

  • Hierarchical covalent-organic framework (COF) and metal-organic framework (MOF) composites (COF@MOF) offer tunable properties for diverse applications.
  • Developing universal strategies for controlled COF@MOF assembly remains a challenge.

Purpose of the Study:

  • To introduce a flexible metal pre-fixation (MPF) strategy for controllable COF@MOF composite synthesis.
  • To elucidate the mechanisms governing morphology, size, and coordination structure modulation.

Main Methods:

  • A novel metal pre-fixation (MPF) synthesis strategy was developed.
  • Experimental characterization and density functional theory (DFT) calculations were employed.
  • Hypothesis-deduction approach was used to understand underlying mechanisms.

Main Results:

  • The MPF strategy facilitated MOF growth on PY-COF-COOH with controlled morphology and size.
  • Ion distribution-guided synthesis (IDGS), crystal-facet shielding (CFS), and aperture synergistic regulation (ASR) were identified as key mechanisms.
  • MPF-derived composites demonstrated enhanced CH4/C2H6/C3H8 separation and H2O2 activation.

Conclusions:

  • The MPF strategy provides a universal approach for designing high-performance COF@MOF composites.
  • This work offers a guide for MPF-based design of advanced functional materials.