NLO Behavior of Polymers Containing Y-Shaped Chromophores

✍ Scribed by Antonio Carella; Fabio Borbone; Ugo Caruso; Roberto Centore; Antonio Roviello; Alberto Barsella; Alessia Quatela

• Book ID: 102483782
• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 166 KB
• Volume: 208
• Category: Article
• ISSN: 1022-1352
• DOI: 10.1002/macp.200700275

✦ Synopsis

Abstract

New polyurethanes containing Y‐shaped chromophores, symmetrical derivatives of 4‐(dicyanomethylene)‐2‐methyl‐6‐[p‐(dimethylamino)styryl]‐4H‐pyran, have been prepared. The polymers show high glass transition temperatures (T~g~) and a good thermal stability. SHG measurements on poled polymer films of the synthesized polymers have been carried out and a maximum d~33~ of 15 pm · V^−1^ has been found at 1 368 nm fundamental wavelength. Time stability measurements on the most active polymer have shown that after the initial fast relaxation, the d~33~ value remains constant at 80 °C for 60 d.

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