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Reactions between or within molecular crystals.

Dario Braga1, Fabrizia Grepioni

  • 1Dipartimento di Chimica, G. Ciamician, Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy. dario.braga@unibo.it

Angewandte Chemie (International Ed. in English)
|August 10, 2004
PubMed
Summary

Mechanochemical methods activate reactions in molecular crystals. Solvent-free techniques like cogrinding offer green routes to novel molecular and supramolecular solids.

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Area of Science:

  • Solid-state chemistry
  • Supramolecular chemistry
  • Mechanochemistry

Background:

  • Reactions within or between molecular crystals are crucial in materials science.
  • Mechanical activation offers unique pathways for solid-state transformations.
  • Supramolecular bonding plays a key role in controlling these reactions.

Purpose of the Study:

  • To review reactions in molecular crystals, particularly those activated by mechanical methods.
  • To highlight the role of supramolecular interactions in controlling solid-state reactions.
  • To propose solvent-free mechanochemical methods as green synthesis routes.

Main Methods:

  • Review of literature on mechanochemically activated reactions in molecular crystals.
  • Focus on reactions controlled by supramolecular bonding (template cycloadditions, inclusion compounds, noncovalent bond reassembly, complex/coordination compound formation).

Related Experiment Videos

  • Discussion of solvent-free techniques such as cogrinding, milling, and kneading.

    • Main Results:

    • Mechanochemical activation enables diverse solid-state reactions.
    • Supramolecular interactions dictate the outcome of many crystal-to-crystal reactions.
    • Solvent-free mechanochemical methods are effective for preparing novel molecular and supramolecular solids.

    Conclusions:

    • Mechanochemistry provides powerful tools for solid-state synthesis.
    • Supramolecular chemistry principles are essential for designing mechanochemical reactions.
    • Green, solvent-free mechanochemical approaches are promising for sustainable materials preparation.