Interlayer Modification of a Layered Silicate RUB-18 with 4-Phosphonophenylsilane and Its Surface Acidic Functions
Interlayer Modification of a Layered Silicate RUB-18 with 4-Phosphonophenylsilane and Its Surface Acidic Functions
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4-膦酰基苯基硅烷对层状硅酸盐RUB-18的层间改性及其表面酸性功能
DOI：
10.1021/acs.inorgchem.1c03795
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发表时间：
2022
影响因子：
4.6
通讯作者：
Maeda Kazuyuki
中科院分区：
文献类型：
--
作者：
Nomi Masafumi;Morita Masashi;Kondo Atsushi;Maeda Kazuyuki
使用含膦酸基团的新型芳族甲硅烷基化试剂（4-膦酰基苯基硅烷：PPS）对层状硅酸盐H-RUB-18（Si 4 O 7（OH）2）进行层间甲硅烷基化（H-PPS-RUB-18）。通过H-RUB-18与（4-二乙氧基磷酰基苯基）-三乙氧基硅烷（p-PPS-E）的反应将膦酸基团连接到硅酸盐层上，随后用盐酸水解酯部分。H-PPS-RUB-18是一种固体酸，如各种烷基胺的插层和酮的催化缩醛化所示。一个系统的层间距的增加，导致表面的酸性性能，通过插入一系列的烷基胺。此外，H-PPS-RUB-18被剥离，产生具有约200 nm的单层纳米片。2.0 nm厚度。酮的催化缩醛反应与改性后的RUB-18的层间距有关。
The interlayer silylation of a layered silicate H-RUB-18 (Si4O7(OH)2) using a new aromatic silylating reagent containing a phosphonic acid group (4-phosphonophenylsilane: PPS) was demonstrated (H-PPS-RUB-18). The phosphonic acid groups were attached to the silicate layers through the reaction of H-RUB-18 with (4-diethoxyphosphorylphenyl)-triethoxysilane (p-PPS-E), and the ester moieties were subsequently hydrolyzed with hydrochloric acid. H-PPS-RUB-18 is a solid acid, as indicated by the intercalation of various alkylamines and the catalytic acetalization of ketones. A systematic increase in interlayer spacing leading to surface acidic properties was obtained through intercalation with a series of alkylamines. In addition, H-PPS-RUB-18 was exfoliated, resulting in single-layer nanosheets withca. 2.0 nm thickness. The catalytic acetalization of ketones was related to the interlayer spacing of the modified RUB-18.