- Helical superstructures of a C2-symmetric molecule exhibiting strong second harmonic generation in the solid-state
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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 (see picture) of a single-handedness oriented in one direction. The latter showed a strong solid-state second harmonic generation capability.
- Gangopadhyay,Radhakrishnan
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- Copper(I) catalysis: Synthesis of N,N′-diarylated and N-aryl,N′-formylated chiral C2-symmetric diamines
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Chiral N,N′-diaryl C2-symmetric diamines and N-aryl,N′-formyl-trans-(1R,2R)-diaminocyclohexane are readily accessed by copper catalyzed N,N′-diarylation and N-aryl,N′-formylation of trans-(1R,2R)-diaminocyclohexane with aryl bromides. N,N′-diar
- Alakonda, Laxhmaiah,Periasamy, Mariappan
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experimental part
p. 3859 - 3863
(2010/03/03)
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