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Two kinds of glutamaic acid-based coumarin derivatives show a quite different trend against gelation in organic solvents in terms of inter- or intramolecular hydrogen bonds involved. It has been found out that addition of the valinate structure into the coumarine derivative could improve its gelation ability.
The absolute molecular structure of air stable n-type semiconducting material 2,5-difluoro-1,4-phenylene-3,3′-bis{2-[(4-trifluoromethyl)phenyl]acrylonitrile} was determined by using twin crystal treatment X-ray diffraction analysis. The compound was readily dimerized in solution via irradiating of UV or Sun light. The exact molecular structure of the dimer also determined by X-ray analysis.
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