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Making crystals from crystals: a green route to crystal engineering and polymorphism
Dario Braga1, Fabrizia Grepioni
1Dipartimento di Chimica G. Ciamician, University of Bologna, Via Selmi 2, 40126 Bologna, Italy. dario.braga@unibo.it
Chemical Communications (Cambridge, England)
|July 20, 2005
Summary
Solvent-free reactions create new crystalline materials, including co-crystals and coordination networks. This green chemistry approach advances supramolecular solid-state chemistry and crystal engineering.
Area of Science:
- Solid-state chemistry
- Crystal engineering
- Supramolecular chemistry
Background:
- Crystalline materials can react with each other or with vapors.
- These reactions can yield novel crystalline substances.
- Solvent-free processes offer sustainable synthesis routes.
Purpose of the Study:
- To explore solvent-free reactions for generating new crystalline materials.
- To demonstrate the utility of solid-vapor reactions in crystal engineering.
- To highlight the green chemistry aspects of these methods.
Main Methods:
- Utilizing supramolecular reactions between crystalline solids.
- Employing reactions between crystalline solids and vapors.
- Investigating solvent-less solid-state transformations.
Main Results:
- Successfully prepared hydrogen-bonded co-crystals.
- Generated coordination networks through solvent-free methods.
- Demonstrated the preparation of polymorphs and solvates via solid-vapor interactions.
Conclusions:
- Solvent-free reactions are effective for synthesizing diverse crystalline materials.
- Solid-vapor reactions are a viable tool for crystal engineering.
- These methods represent a green approach to supramolecular solid-state chemistry.