Thymidine receptor residues were covalently attached to the inner side wall of silica nanotubes (SNTs). The adsorption capacities of the thymidine-functionalized silica nanotubes (T-SNTs) with nucleic acids and oligonucleic acids were evaluated. The T-SNTs exhibited excellent selectivity both in recognition and separation of adenosine and adenosine-based oligonucleotides, because adenosine and oligoadenosine were selectively bound to the inner surface of T-SNTs by formation of complementary intermolecular hydrogen bonds. On the other hand, guanosine, cytosine and oligoguanosine derivatives were not bound to the T-SNTs. The T-SNTs selectively separated 95% of oligoadenosine from a mixture of equal amounts of oligocytosine and oligoguanosine. Our results imply that the T-SNTs can be used as a selective receptor and separator for the extraction and separation of adenosine and oligoadenosine derivatives in aqueous solution.
胸苷受体残基以共价方式固定在
硅纳米管(SNTs)的内侧壁上。评估了
胸苷功能化
硅纳米管(T-SNTs)与核酸和寡核苷酸的吸附能力。T-SNTs在识别和分离
腺苷及
腺苷基寡核苷酸方面表现出优异的选择性,因为
腺苷和寡
腺苷通过形成互补的分子间氢键,选择性地结合在T-SNTs的内表面上。另一方面,
鸟苷、
胞苷和寡
鸟苷衍
生物未能与T-SNTs结合。T-SNTs能够从等量的寡
胞苷和寡
鸟苷的混合物中选择性分离出95%的寡
腺苷。我们的结果表明,T-SNTs可以作为选择性受体和分离剂,用于在
水溶液中提取和分离
腺苷及寡
腺苷衍
生物。