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Related Experiment Video

Updated: May 29, 2026

Structure and Coordination Determination of Peptide-metal Complexes Using 1D and 2D 1H NMR
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Structure and Coordination Determination of Peptide-metal Complexes Using 1D and 2D 1H NMR

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Synthesis and guest inclusion for molecular catcher-based structure determination.

Yitao Wu1,2, Lei Xu3, Shang Li1,2

  • 1State Key Laboratory of Soil Pollution Control and Safety, Stoddart Institute of Molecular Science, Department of Chemistry, Zhejiang University, Hangzhou, P. R. China.

Nature Protocols
|May 27, 2026
PubMed
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A novel

Area of Science:

  • Crystallography
  • Materials Science
  • Supramolecular Chemistry

Background:

  • Determining molecular structures of long alkyl chain compounds via X-ray diffraction is challenging due to difficulties in growing single crystals.
  • Conventional single-crystal X-ray diffraction is often impossible for such compounds.

Purpose of the Study:

  • To present detailed protocols for synthesizing a pillar[5]arene-incorporated metal-organic framework (MOF) acting as a 'molecular catcher'.
  • To demonstrate the utility of this MOF for rapid and accurate crystal structure determination of long-alkyl-chain compounds without single crystal growth.

Main Methods:

  • Synthesis of pillar[5]arene-containing MOF crystals using a pillar[5]arene derivative, tetraphenyl ethylene derivative, and zinc nitrate hexahydrate in N,N-dimethylformamide.

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Last Updated: May 29, 2026

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14:44

Structure and Coordination Determination of Peptide-metal Complexes Using 1D and 2D 1H NMR

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  • Inclusion of target long-alkyl-chain compounds into pre-synthesized MOF crystals via soaking.
  • X-ray diffraction analysis of the guest-included MOF crystals to determine the guest's molecular structure.

    • Main Results:

    • Successful synthesis of pillar[5]arene-containing MOF crystals suitable for guest inclusion.
    • Demonstration of the 'molecular catcher' technique enabling structure determination of challenging long-alkyl-chain compounds.
    • The entire structure determination process can be completed within 10 days.

    Conclusions:

    • The pillar[5]arene-based MOF 'molecular catcher' provides an effective solution for crystal structure determination of compounds that are difficult to crystallize.
    • This method bypasses the need for growing single crystals, significantly accelerating the structure elucidation process.
    • Detailed protocols are provided for MOF synthesis and its application in structural analysis.