Supramolecular behaviour of substituted pyridinium salts and merocyanine dyes [Elektronische Ressource] / von Diana Ster

Supramolecular behaviour of substituted pyridinium salts and merocyanine dyes Dissertation Zur Erlangung des akademischen Grades doctor rerum naturalium (Dr. rer. nat.) vorgelegt der Naturwissenschaftlichen Fakultät II – Chemie und Physik der Martin-Luther-Universität Halle-Wittenberg von Frau Dipl.-Ing. Diana Ster geb. am 01.02.1979 in Baia Mare Gutachter: 1. Prof. Dr. G. Israel 2. Prof. Dr. R. Zentel Halle (Saale), den 17.10.2007urn:nbn:de:gbv:3-000012638[http://nbn-resolving.de/urn/resolver.pl?urn=nbn%3Ade%3Agbv%3A3-000012638]Contents 1. Introduction and problems 1 1.1. Theoretical part and literature 1 1.1.1. Ionic liquid crystals 1 1.1.1.1. General aspects 1 1.1.1.2. Pyridinium salts 3 1.1.1.3. Stilbazolium salts 6 1.1.2. Merocyanine dyes 7 1.1.2.1. Supramolecular behaviour 7 1.1.2.2 Spectral properties 10 1.2. Introduction of the synthesized and investigated compounds 12 2. Results and discussions 14 2.1. Synthesis 14 2.1.1. Synthesis of merocyanine dyes 14 2.1.2 Synthesis of N-alkyl-4'-substituted-stilbazolium compounds 18 2.1.3 Synthesis of N-alkyl-4- and -3-phenyl-pyridinium salts 20 2.2. Properties of N-alkyl-4- and -3-substituted-pyridinium salts 21 2.2.1. Liquid crystalline properties 21 2.2.1.1.