Journal
JOURNAL OF MOLECULAR STRUCTURE
Volume 891, Issue 1-3, Pages 312-316Publisher
ELSEVIER
DOI: 10.1016/j.molstruc.2008.04.005
Keywords
Banana-shaped molecule; Liquid crystals; Intermolecular hydrogen bonding
Categories
Funding
- National Natural Science Foundation of China [50573029, 50520130316]
- National Basic Research Program of China [2007CB936402]
- 111 Project [1306009]
- Program for Changjiang Scholars and Innovative Research Team in University [PCSIRT0422]
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A new symmetric bi-pyridyl banana-shaped molecule 1,3-phenylene diisonicotinate (PDI) was designed and synthesized. Its molecular structure was confirmed by FTIR, Elemental analysis and H-1 NMR. X-ray crystallographic study reveals that there is an angle of approximate 118 degrees among the centroids of the three rings (pyridyl-phenyl-pyridyl) in each PDI molecule indicating a desired banana shape. In addition, a series of liquid crystal complexes nBA:PDI:nBA induced by intermolecular hydrogen bonding between PDI (proton acceptor) and 4-alkoxybenzoic acids (nBA, proton donor) were synthesized and characterized. The mesomorphism properties and optical textures of the complex of nBA:PDI:nBA were investigated by differential scanning calorimetry, polarizing optical microscope and X-ray diffraction. (C) 2008 Elsevier B.V. All rights reserved.
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