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Macrodiscotic triphenylenophthalocyanines
Andrew N Cammidge1, Hemant Gopee
1Wolfson Materials and Catalysis Centre, School of Chemical Sciences, University of East Anglia, Norwich, UK NR4 7TJ. a.cammidge@uea.ac.uk
Chemical Communications (Cambridge, England)
|July 19, 2002
Summary
The synthesis of novel, heavily substituted triphenylenophthalocyanines was achieved. These new compounds exhibit liquid crystal properties, indicating potential applications in materials science.
Area of Science:
- Organic Chemistry
- Materials Science
- Supramolecular Chemistry
Background:
- Phthalocyanines are macrocyclic compounds with diverse applications.
- Triphenylene units are known to induce mesogenic properties.
- Combining these moieties offers potential for novel functional materials.
Purpose of the Study:
- To synthesize and characterize the first heavily substituted triphenylenophthalocyanines.
- To investigate the liquid crystalline (mesogenic) behavior of these novel compounds.
Main Methods:
- Multi-step organic synthesis for the preparation of substituted triphenylene precursors.
- Cyclotetramerization reactions to form the phthalocyanine core.
- Characterization using techniques such as NMR spectroscopy, mass spectrometry, and UV-Vis spectroscopy.
- Polarized optical microscopy and differential scanning calorimetry to assess mesogenic properties.
Main Results:
- Successful synthesis of novel, heavily substituted triphenylenophthalocyanines.
- Demonstration of liquid crystalline behavior (mesomorphism) in these compounds.
- Structural analysis confirmed the intended molecular architecture.
Conclusions:
- The first heavily substituted triphenylenophthalocyanines have been successfully synthesized.
- These novel compounds exhibit significant mesogenic properties, expanding the scope of phthalocyanine-based liquid crystals.