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Helical Superstructures of a C2 -Symmetric Molecule Exhibiting Strong Second Harmonic Generation in the Solid-State
P Gangopadhyay1, T P Radhakrishnan1
1School of Chemistry University of Hyderabad Hyderabad-500 046 (India) Fax: (+91) 40-3012460.
Abstract:
The crystallization solvent exerts a critical control of the nonlinear optical properties of helical superstructures in molecular crystals based on N,N'-bis(4-nitrophenyl)-(1R,2R)-diaminocyclohexane. While crystallization from ethyl acetate resulted in mutually orthogonal helices with different handedness, crystallization from ethyl acetate/hexane or acetyl acetone/hexane resulted in the formation of helical motifs of a single-handedness oriented in one direction. The latter showed a strong solid-state second harmonic generation capability.
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