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Linear 2,3-di-n-alkoxy-azapolycyclic arenes are shown to act as potent gelators for a variety of organic liquids. This outstanding property is restricted to molecules that have no nitrogen atoms on the 1,4 positions. The readily accessible 5,12-diazatetracenes form thermoreversible gels which do not involve hydrogen bonding and open up new prospects for larger scale applications. Their gel-forming abilities and colouration can be sligthly tuned by variation in acidic conditions.
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