Sanguinet Lionel, Pozzo Jean-Luc, Rodriguez Vincent, Adamietz Frédéric, Castet Frédéric, Ducasse Laurent, Champagne Benoît
Chimie Supramoléculaire, Biomimétisme et Nanoscience, UMR 5802 CNRS, Université Bordeaux I, Cours de la Libération 351, F-33405 Talence CEDEX, France.
J Phys Chem B. 2005 Jun 9;109(22):11139-50. doi: 10.1021/jp0442450.
In this paper, acido- and phototriggered enhancement of the nonlinear optical (NLO) properties are achieved by combining the 10-(2-arylethenyl)indolino[2,1-b]oxazolidine unit with various styrylic residues. The synthetic pathway allows the preparation of phenyl, naphthyl, anthryl, and phenanthryl derivatives, which have been shown to display photochromic and acidochromic behavior at ambient temperature. The multiaddressable molecular switches are characterized by a large contrast of the NLO response along the reversible transformations. Hyper-Rayleigh scattering (HRS) experiments clearly indicate the strong influence of the electrodonating substituent borne by the aromatic system. Theoretical calculations have been performed for representative molecules showing a good agreement with the experimental hyperpolarizabilities. This enables a better understanding of the NLO responses in terms of structural and electronic parameters for both closed and protonated open forms.
在本文中，通过将10 -（2 - 芳基乙烯基）吲哚并[2,1 - b]恶唑啉单元与各种苯乙烯基残基相结合，实现了对非线性光学（NLO）性质的酸触发和光触发增强。该合成途径允许制备苯基、萘基、蒽基和菲基衍生物，这些衍生物已被证明在室温下表现出光致变色和酸致变色行为。多可寻址分子开关的特征在于沿可逆转变的NLO响应具有很大的对比度。超瑞利散射（HRS）实验清楚地表明了芳香体系所携带的给电子取代基的强烈影响。已对代表性分子进行了理论计算，结果与实验超极化率显示出良好的一致性。这使得能够根据封闭形式和质子化开放形式的结构和电子参数更好地理解NLO响应。
