Kuroda Yoshiyuki, Koichi Tatsuyuki, Muramatsu Keisuke, Yamaguchi Kazuya, Mizuno Noritaka, Shimojima Atsushi, Wada Hiroaki, Kuroda Kazuyuki
Waseda Institute for Advanced Study, Waseda University, 1-6-1 Nishiwaseda, Shinjuku-ku, Tokyo, 169-8050, Japan.
Department of Applied Chemistry, Faculty of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo, 169-8555, Japan.
Chemistry. 2017 Apr 11;23(21):5023-5032. doi: 10.1002/chem.201605698. Epub 2017 Feb 16.
Brucite-type layered metal hydroxides are prepared from diverse metallic elements and have outstanding functions; however, their poor intercalation ability significantly limits their chemical designability and the use of their potentially ultrahigh surface areas and unique properties as two-dimensional nanosheets. Here, we demonstrate that tripodal ligands (RC(CH OH) , R=NH , CH OH, or NHC H SO H) are useful as "one-size-fits-all" modifiers for the direct synthesis of hybrid metal hydroxide nanosheets with various constituent metallic elements (M=Mg, Mn, Fe, Co, Ni, or Cu) and surface functional groups. The hybrid nanosheets are formed directly from solution phases, and they are stacked into a turbostratic layered structure. The ligands form tridentate Mg-O-C bonds with brucite layers. The hybrid brucite intercalates various molecules and is exfoliated into nanosheets at room temperature, although the non-modified material does not intercalate any molecules. Consequently, both the constituent metallic elements and surface functional groups are freely designed by the direct synthesis.
水镁石型层状金属氢氧化物由多种金属元素制备而成，具有出色的功能；然而，其较差的插层能力显著限制了它们的化学可设计性以及作为二维纳米片的潜在超高表面积和独特性能的应用。在此，我们证明三脚架配体（RC(CH₂OH)₃，R = NH₂、CH₂OH或NHC₆H₄SO₃H）可作为“万能”改性剂，用于直接合成具有各种组成金属元素（M = Mg、Mn、Fe、Co、Ni或Cu）和表面官能团的混合金属氢氧化物纳米片。混合纳米片直接从溶液相中形成，并堆叠成一种乱层状结构。配体与水镁石层形成三齿Mg - O - C键。尽管未改性的材料不插层任何分子，但混合水镁石在室温下能插层各种分子并剥离成纳米片。因此，通过直接合成可以自由设计组成金属元素和表面官能团。
