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NMR Study of Photoisomerization in Bulk and Confined Liquid Crystals
Deuteron nuclear magnetic resonance was used to study the phase separation behavior of photoisomerizable liquid crystal diheptylazobenzene (7AB). Under UV illumination, the elongated trans molecules are converted to boomerang shaped cis form, creating a binary trans-7AB and cis-7AB mixture. It was demonstrated that the concentration of both components can be …