Synthesis and photophysical properties of 2,2′-binaphthalene-based receptor bearing trimethylsilyl groups to improve the solubility
作者:Shin-ichi Kondo、Naoya Watanabe、Fubuki Takahashi、Nobuhiro Takeda、Masafumi Unno
DOI:10.1007/s10847-012-0142-8
日期:2013.2
Two trimethylsilyl groups were introduced at 5- and 5′-positions of 2,2′-binaphthalene to improve the solubility of 2,2′-binaphthalene-based receptors. The X-ray crystallographic analysis revealed the twisted structure of 2 in the solid state. The solubility of 2 was moderately improved by 3.1-fold comparing with mother skeleton 1. As a practical example of 2, receptor 8 bearing two aza-15-crown-5 moieties was prepared and the selective binding of 8 with Ba2+ can be observed by the formation of sandwich-like complex, which shows no prevention of binding ability of the receptor by introduction of the bulky substituents.
在2,2′-联萘的5位和5′-位引入两个三甲基硅基,以改善2,2′-联萘受体的溶解度。X射线晶体学分析揭示了2在固态下的扭曲结构。与母体骨架1相比,2的溶解度适度提高了3.1倍。作为2的实际应用示例,制备了带有两个氮杂-15-冠-5部分的受体8,通过形成三明治状复合物可以观察到8与Ba2+的选择性结合,这表明引入大体积取代基不会影响受体的结合能力。