Liquid crystalline benzothiophene derivatives. Part 2: 2,5-disubstituted benzothiophenes

0368154 - FZÚ 2012 RIV GB eng J - Článek v odborném periodiku
Kozmík, V. - Henke, A. - Řehová, L. - Kurfűrst, M. - Slabochová, M. - Svoboda, J. - Novotná, Vladimíra - Glogarová, Milada
Liquid crystalline benzothiophene derivatives. Part 2: 2,5-disubstituted benzothiophenes.
Liquid Crystals. Roč. 38, č. 10 (2011), s. 1245-1261. ISSN 0267-8292. E-ISSN 1366-5855
Grant CEP: GA AV ČR(CZ) GA202/09/0047; GA ČR(CZ) GAP204/11/0723
Výzkumný záměr: CEZ:AV0Z10100520
Klíčová slova: liquid crystals * 2,5-disubstituted benzothiophene * calamitic phases * mesomorphic properties
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 1.858, rok: 2011

In the continuation of our study on heterocyclic mesogens, the structural motif of a 2,5-disubstituted benzothiophene as the central unit was utilised to design novel liquid crystals. Despite the bent molecular structure, the formation of a standard calamitic phase was observed. The mesomorphic properties of the model substances of series I was very close to that of the previously studied 6-substituted derivatives. Introduction of the chiral terminal unit led to appearance of the ferroelectric smectic C* (SmC*) phase. Phenylbenzothiophene based mesogens exhibited higher clearing temperatures and polymorphism (nematic-smectic A-SmC sequence). Thus, the central benzothiophene unit can be successfully utilised in the design of various liquid crystals.
Trvalý link: http://hdl.handle.net/11104/0202582