Nonlinear optical properties of triptycene derivatives

✍ Scribed by S. Norvez; M. Barzoukas

• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 324 KB
• Volume: 165
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(90)87009-g

✦ Synopsis

Nonplanar triptycene derivatives are used for the first time as active subunits for second-harmonic generation. The quadratic hyperpolarizabihty coefficient ,V of 2nitrotriptycene is measured in solution by use of the electric-field-induced second-harmonic gcncration (EFISH) tcchniquc. Its magnitude is almost five times larger than that for nitrobenzene. This enhancement is probably linked to the sharp increase of the extinction coefficients of the low-energy absorption bands when going from nitrobenzene to 2-nitrotriptycene.