Complimentary Polytopic Interactions

✍ Scribed by Ekaterina O. Arikainen; Neville Boden; Richard J. Bushby; Owen R. Lozman; Jeremy G. Vinter; Andrew Wood

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 192 KB
• Volume: 112
• Category: Article
• ISSN: 0044-8249
• DOI: 10.1002/1521-3757(20000703)112:13<2423::aid-ange2423>3.0.co;2-r

✦ Synopsis

Substantially enhanced mesophase ranges can be obtained by mixing the discotic liquid crystal 1 a with one equivalent of the ªlarger coreº polynuclear aromatic compounds 2 a or 3 a (Scheme 1). The special stability of these novel p-stacked systems is not the result of either charge-transfer or (net) quadrupolar interactions but instead arises from a complimentary polytopic interaction (CPI).

Chemical doping of discotic liquid crystals is well known and, in some cases, it produces enhanced mesophase ranges. Hence, mixtures of the discotic liquid crystal 1 a with 2,4,7trinitrofluoren-9-one (TNF) have been extensively studied. Although charge-transfer bands are observed in the UV/Vis spectrum of this mixture, they are weak. It is now believed