Physicochemical Properties of Mesoporous Silicas Modified with Hydrazide and Amide Functional Groups

被引：5
|
作者：
Batueva, T. D. [1 ]
Kondrashina, N. B. [1 ]
Kuz'micheva, N. D. [1 ]
Tiunova, T. G. [1 ]
Shcherban', M. G. [2 ]
机构：
[1] Russian Acad Sci, Inst Tech Chem, Ural Branch, Perm Fed Res Ctr, Perm, Russia
[2] Perm State Natl Res Univ, Ul Bukireva 15, Perm 614990, Russia
来源：
RUSSIAN JOURNAL OF APPLIED CHEMISTRY | 2017年 / 90卷 / 11期
基金：
俄罗斯基础研究基金会;
关键词：
Amides; -; Silica; Sorbents;
D O I：
10.1134/S1070427217110039
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Physicochemical properties of mesoporous silicas modified with hydrazide and amide functional groups were studied. It was found that the main properties of the sorbents under study, characterized by pK(a1), are weakly pronounced. The replacement of the counter ion with a hydroxide occurs in a less alkaline medium, compared with monomer analogs. The sorbent modified with N', N'-dimethylhydrazide groups by the impregnation method has pK(a2) = 11.78, which is indicative of a sufficient strength of bonding between the counter ion and the silica matrix. The temperature limits, heat effects, and decomposition stages of the sorbents were determined.
引用
收藏
页码：1746 / 1752
页数：7
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