Synchrotron x-ray study of the orientational ordering D2-D1 structural phase transition of freely suspended discotic strands in triphenylene hexa-n-dodecanoate

Journal Article · Mon Sep 17 00:00:00 EDT 1984 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.53.1172· OSTI ID:6507684

Safinya, C R; Liang, K S; Varady, W A; Clark, N A; Andersson, G

We demonstrate the feasibility of x-ray scattering studies of freely suspended strands of discotic liquid crystals (of triphenylene hexa-n-dodecanoate). We are able to grow strands, which are stable for days, of diameter >50 ..mu..m with a few single crystal domains. Unexpectedly, we find that the quasi two-dimensional structural phase transition from columnar D2 to columnar D1 corresponds to the orientational ordering of columns of molecules with the molecules tilted at finite angles to the column axis in both phases.

• Research Organization: Exxon Research and Engineering Company, Corporate Research Science Laboratories, Annandale, New Jersey 08801
• OSTI ID: 6507684
• Journal Information: Phys. Rev. Lett.; (United States), Vol. 53:12
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
DODECANE
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
LIQUID CRYSTALS
TRIPHENYLENE
EXPERIMENTAL DATA
ORIENTATION
SYNCHROTRON RADIATION
X-RAY DIFFRACTION
ALKANES
AROMATICS
BREMSSTRAHLUNG
COHERENT SCATTERING
CONDENSED AROMATICS
CRYSTALS
DATA
DIFFRACTION
ELECTROMAGNETIC RADIATION
FLUIDS
HYDROCARBONS
INFORMATION
LIQUIDS
NUMERICAL DATA
ORGANIC COMPOUNDS
PHASE TRANSFORMATIONS
RADIATIONS
SCATTERING
400301* - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)