Alignment of chevron-shaped molecules for photonic and electronic applications†
Abstract
A novel method is reported whereby unconventional molecules without aliphatic tails may be non-centrosymmetrically aligned by the Langmuir–Blodgett technique, the molecules in this case having a central cationic acceptor and two π-bridged donor groups with an angle of ca. 120° between the charge-transfer axes of the chevron-shaped D-π-(A+)-π-D unit. Their LB films exhibit second-harmonic generation and molecular rectification.
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