Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 342121
Title Binary phase diagram of triphenylene derivates : the role of hydrogen bonds
Author(s) Yildirim, Z.; Mendes, E.; Picken, S.J.; Paraschiv, I.; Marcelis, A.T.M.; Zuilhof, H.; Vos, W.M. de; Sudhölter, E.J.R.
Source Molecular Crystals and Liquid Crystals 439 (2005). - ISSN 1542-1406 - p. 2103 - 2109.
Department(s) Laboratory for Organic Chemistry
Microbiological Laboratory
Publication type Refereed Article in a scientific journal
Publication year 2005
Keyword(s) reentrant isotropic-phase - columnar mesophases - liquid-crystals - chains
Abstract In this study, the binary phase diagram of two triphenylene derivatives is investigated by using differential scanning calorimetry (DSC), optical polarizing microscopy (OPM), and wide-angle x-ray scattering (WAXS). The triphenylene derivatives studied are based on hexa-alklyoxy-triphenylene. One compound in the binary mixture HAT6 has six symmetrical hexyloxy tails each containing six carbon atoms. The other compound, HAT6-C10UC6, has one asymmetrical tail bearing a urea functionality at a specific distance from the aromatic core. The introduction of this asymmetrical H-bonding unit into the structure results in a complete disruption of liquid crystallinity while a ¿pseudo re-entrant¿ phenomenon is observed in the binary mixture phase diagram.
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