自己組織化を利用した表面修飾による無機-有機ハイブリッド

摘要

Design of interfaces is an important factor in control of the structures and properties of inorganic-organic hybrid materials, and surface modification with self-assembly monolayers (SAM) can provide interesting inorganic-organic hybrid materials. Here, we focus on SAM-based surface modification of layered inorganic materials via grafting reactions. Layered perovskites can be modified with alcohols using alcohol-exchange reactions to yield alkoxy-modified products. Methods of surface modification with organophosphonic acids have also been developed for modification of layered perovskites and layered potassium hexaniobate. Modification with organophosphonic acids is more attractive than modification with common silylation reagents, since homocomdensation is unlikely to occur under moderate conditions. Exfoliation of SAM-modified materials provides nanosheets covered with SAM. Since these SAM-modified nanosheets exhibit excellent compatibility with polymers as well as interesting surface properties, they can be employed for preparation of polymer-based hybrid materials. A similar strategy can be employed for surface modification of titanium oxide nanoparticles.%無機-有機ハイブリッド材料において、各成分を繋ぎ合わせる界面の設計は重要な要素であり、分子レベルで精密制御された表面修飾が有効な手段となる。ここでは、自己組織化を利用したアルコール交換型反応や有機ホスホン酸修飾の技術とともに、それらを活用した無機-有機ハイブリッド材料の応用について紹介する。