NLO chromophores containing dihydrobenzothiazolylidene and dihydroquinolinylidene donors with an azo linker: Synthesis and optical properties

作者：Ashraf Mohamed; Teshome Ayele; Kay Andrew J^*; Gainsford Graeme J; Bhuiyan M Delower H; Asselberghs Inge; Clays Koen

来源：Dyes and Pigments, 2013, 98(1): 82-92.

DOI：10.1016/j.dyepig.2013.01.010

• Nonlinear optics
• Chromophore
• Hyperpolarizability
• Hyper-Raleigh scattering
• Azo dyes
• X-Ray crystallography

We report the synthesis of a series of nonlinear optical chromophores containing either - a dihydrobenzothiazolylidene or dihydroquinolinylidene donor with an azo linker. The results demonstrate the versatility of coupling a diazonium salt to a donor-methylidene nucleus in order to access novel materials with good thermal stabilities and high nonlinear optical responses. From hyper-Raleigh scattering studies it was found that the use of the well-known TCF acceptor yields the best performing chromophores, one of which has a dynamic first hyperpolarizability of 1900 x 10(-30) esu at 800 nm. The results from this study suggest the use of pro-aromatic donors such as dihydrobenzothiazolylidene or dihydroquinolinylidene results in compounds with higher nonlinear optical responses than those containing donors based on either indoline or aniline.

• 出版日期2013-7