Surface-Relief Gratings and Stable Birefringence Inscribed Using Light of Broad Spectral Range in Supramolecular Polymer-Bisazobenzene Complexes

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• 作者：Jenni E. Koskela ; Jaana Vapaavuori ; Juho Hautala ; Arri Priimagi ; Charl F. J. Faul ; Matti Kaivola ; Robin H. A. Ras
• 刊名：The Journal of Physical Chemistry C
• 出版年：2012
• 出版时间：January 26, 2012
• 年：2012
• 卷：116
• 期：3
• 页码：2363-2370
• 全文大小：921K
• 年卷期：v.116,no.3(January 26, 2012)
• ISSN：1932-7455

文摘

We report on phenol鈥損yridine hydrogen-bonded supramolecular polymer鈥揳zobenzene complexes made from a newly designed polar bisazobenzene chromophore. Because of the substitution with a polar nitro group, the chromophore possesses an extremely broad absorption band, spanning from near-UV up to 650 nm. Moreover, the inclusion of two methoxy groups to the central benzene ring prevents excessive chromophore鈥揷hromophore intermolecular interactions and provides advantageous size-related properties. Together, these features of the prepared photoresponsive polymer materials enable efficient inscription of (i) photoinduced birefringence with outstanding stability at various chromophore concentrations and (ii) surface-relief grating formation over a wide range of writing wavelengths from 405 to 633 nm. The photoresponsive behavior is compared to that of Disperse Yellow 7-based supramolecular complexes.