Delamination of layered double hydroxides containing amino acids
Delamination of layered double hydroxides containing amino acids
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DOI：
10.1021/cm048842a
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发表时间：
2004-12-14
影响因子：
8.6
通讯作者：
Hibino, T
中科院分区：
文献类型：
--
作者：
Hibino, T
将多种氨基酸作为层间阴离子插层到镁铝水滑石（LDHs）中。这种方法的目的是创造一个层间环境，这是有吸引力的甲酰胺，因为氢键，使甲酰胺的渗透将导致分层。一些氨基酸插层成功地在甲酰胺中脱层，但其他人没有。不能分层的插层物具有高氨基酸含量，超过15-20%的电荷占有率。在这种速率下，紧密堆积的氨基酸很可能通过氢键彼此紧密连接并与宿主层紧密连接，因此甲酰胺可能无法打开或大量渗透夹层。与此相反，没有一个明确的较低的阈值为氨基酸的电荷占用，甚至LDH插层与电荷占用小于1%进行分层。最后，M2+-Al LDH系统以外的Mg-Al系统也发生分层。
Various amino acids were intercalated into Mg-Al layered double hydroxides (LDHs) as interlayer anions. The goal of this approach was to create an interlayer environment that was attractive to formamide, because of hydrogen bonding, so that penetration of formamide would lead to delamination. Some of the amino acid intercalates were successfully delaminated in formamide, but others were not. The intercalates that could not be delaminated had a high amino acid content, exceeding 15-20% of the charge occupation rate. At that rate, closely packed amino acids were likely to be tightly connected to one another and to the host layers via hydrogen bonds, and therefore formamide presumably could not open or penetrate the interlayers in large volume. In contrast, there was not a clear lower threshold for charge occupation of amino acid; even LDH intercalates with charge occupations of less than 1% underwent delamination. Finally, M2+-Al LDH systems other than the Mg-Al system also underwent delamination.