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Information on the LiqCryst® Data and Database

Chemical structures are represented by two independent notations: by a list of fragments (e.g. rings, bridges and terminal groups) and/or by their atomic connectivity.

The database contains, among others, entries for more than 39,000 compounds with a nematic phase, about 18,000 chiral compounds, and more then 6,000 compounds with a ferroelectric smecticC* phase.

All kinds of thermotropic and lyotropic liquid crystals are included:

  • calamitics
  • discotics
  • polymers
  • surfactants
  • lipids

For all compounds, the database contains:

  • phase schemes
  • transition temperatures
  • elastic constants
  • spontaneous polarizations
  • references to any included literature on spectroscopic properties

In total more than 365,000 physical properties are recorded in the database.

The Sources of the Data

A significant portion of the data has been obtained from journals and books.
However, the database also contains information from patent literature, conference abstracts, and from Ph.D. theses.
For example, the data for more than 5,000 compounds have been exclusively found in dissertations and have not been published elsewhere.

The Database

The program is a newly developed object oriented database engine, based on the SciDex technology, which allows quick searches to be made for substructures, properties, similarities, chemical elements, phase sequences, transition temperatures, physical measurements and references. The retrieved compound information is displayed in tables. Trends or irregularities in homologous series can be visualized graphically.