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1,4-Diaryl and Schiff's base [1,2,3]-triazole derivative liquid crystalline compounds
Ist Teil von
Liquid crystals, 2006-09, Vol.33 (9), p.997-1003
Ort / Verlag
Taylor & Francis
Erscheinungsjahr
2006
Link zum Volltext
Quelle
Taylor & Francis Journals Auto-Holdings Collection
Beschreibungen/Notizen
Regioselective synthesis of [1,2,3]-triazoles based on the 'click-reaction', involving the Cu(I)-catalysed 1,3-dipolar cycloaddition of aryl azide to terminal arylacetylenes, was successfully employed in the preparation of two series of non-linear mesogens, based on 1,4-diaryl-[1,2,3]-triazole (Ia-e) and with Schiff's base units (IIa-c). Their mesophases were characterized by polarizing optical microscopy and differential scanning calorimetry. All final compounds exhibited preferentially the SmC phase. In addition, compounds of series I showed weak blue fluorescence in solution (λ
max. em.
= 380-386 nm) with poor quantum yields and a Stokes shift of around 90 nm.