Abstract
Porphyrinoids containing vinylene bridges, such as triphyrin(2.1.1), porphycene, porphyrin(2.1.2.1),
and hexaphyrin(2.1.2.1.2.1), are a relatively new family of porphyrinoids. Vinylene
bridges give porphyrinoids a lower symmetry and a flexibility of the framework and
they permit cis/trans-isomerization reactions; these factors confer unique properties to these substances,
such as coordination to metal ions and aromaticity switching. In this account, the
synthesis, crystal structures, and properties of new porphyrinoids containing vinylene
bridges are summarized.
1 Introduction
2 Triphyrin(2.1.1)
3 Porphycene
4 Porphyrin(2.1.2.1)
5 Hexaphyrin(2.1.2.1.2.1)
6 Conclusion
Key words
porphyrins - triphyrin(2.1.1) - porphycene - porphyrin(2.1.2.1) - hexaphyrin(2.1.2.1.2.1)
- vinylene bridge