Morotti Tamara, Calabrese Valentina, Cavazzini Marco, Pedron Danilo, Cozzuol Matteo, Licciardello Antonino, Tuccitto Nunzio, Quici Silvio
CNR - Istituto di Scienze e Tecnologie Molecolari, Via C. Golgi 19, 20133, Milano, Italy.
Dalton Trans. 2008 Jun 14(22):2974-82. doi: 10.1039/b801194j. Epub 2008 Apr 24.
The preparation of materials featuring enhanced second harmonic generation (SHG) values by self-assembly of molecules characterized by high second-order non-linear optic (NLO) activity is nowadays an important and challenging field of research. In order to show SHG the material must have an acentric structure with the dipoles of the molecular components oriented in the same direction and this is synthetically fairly difficult to achieve. This study describes the synthesis of the push-pull stilbazolium salt and its assembly in multilayered acentric thin films, on quartz glass surface, by using the zirconium phosphate/phosphonate (Zr-PO(x)) technique. A particular care has been paid to the optimization of the surface preparation and of the deposition conditions. This allows to obtain highly homogeneous lamellar inorganic-organic materials showing satisfactory second harmonic generation (SHG) values together with high chemical, thermal and mechanical stabilities which are necessary for their integration in optoelectronic devices.
通过具有高二阶非线性光学（NLO）活性的分子自组装来制备具有增强二次谐波产生（SHG）值的材料，如今是一个重要且具有挑战性的研究领域。为了呈现SHG效应，材料必须具有非中心对称结构，且分子组分的偶极子需沿同一方向排列，而这在合成上相当难以实现。本研究描述了推拉型二苯乙烯基唑盐的合成及其通过磷酸锆/膦酸锆（Zr-PO(x)）技术在石英玻璃表面组装成多层非中心对称薄膜的过程。已特别关注表面制备和沉积条件的优化。这使得能够获得高度均匀的层状无机-有机材料，其具有令人满意的二次谐波产生（SHG）值，以及高化学、热和机械稳定性，这些对于将其集成到光电器件中是必不可少的。
