Asakura Yusuke, Kawaura Naoki, Kuroda Yoshiyuki, Koike Masakazu, Wada Hiroaki, Shimojima Atsushi, Kuroda Kazuyuki
Department of Applied Chemistry, Faculty of Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo, 169-8555, Japan.
Present address: Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan.
Chemistry. 2017 Aug 16;23(46):11022-11029. doi: 10.1002/chem.201701504. Epub 2017 Jul 5.
A single-crystalline macroporous layered silicate was obtained for the first time. Firstly, UTL-type zeolite with macropores was prepared hydrothermally under the presence of acetylene black as a macropore template and the subsequent calcination to remove the template. Double four-membered ring (d4r) units in the UTL framework were selectively dissolved to yield a layered silicate with macropores. Intercalation of tetrabutylammonium ions into the macroporous layered silicate is accelerated if compared with that into the same silicate without macropores, indicating the effectiveness of macropores due to easy diffusion. The layered silicate with macropores was converted into PCR-type zeolite with macropores, a hierarchically micro- and macroporous material, through interlayer condensation.
首次获得了单晶大孔层状硅酸盐。首先，在乙炔黑作为大孔模板存在的情况下水热制备具有大孔的UTL型沸石，随后进行煅烧以去除模板。选择性溶解UTL骨架中的双四元环（d4r）单元，得到具有大孔的层状硅酸盐。与插入无大孔的相同硅酸盐相比，四丁基铵离子插入大孔层状硅酸盐的过程加速，这表明大孔因扩散容易而具有有效性。通过层间缩合，将具有大孔的层状硅酸盐转化为具有大孔的PCR型沸石，一种分级微孔和大孔材料。
Zotero 插件