Intercalation of primary diamines and amino acid in the layer structure oxide HTiNbO5
Intercalation of primary diamines and amino acid in the layer structure oxide HTiNbO5
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层状结构氧化物 HTiNbO5 中伯二胺和氨基酸的插层
DOI：
10.1016/0022-4596(85)90288-9
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发表时间：
1985
期刊：
影响因子：
--
通讯作者：
B. Raveau
中科院分区：
文献类型：
--
作者：
A. Grandin;M. Borel;B. Raveau
研究了伯胺在htinbo5层结构中的插层作用。这种插层是定量的和可逆的：在n= 2-10和12的情况下，已经合成了10种符合通式NH3(CH2)nNH(3(TiNbO5)2的化合物。对于每种组合物，根据合成温度可以观察到两种形式，分别称为低温（lt）和高温（ht）。这些化合物的x射线衍射研究表明它们是正交的，其和b参数与HTiNbO5接近。l.t.和h.t.形式通过表征（TiNbO5）层之间间距的参数值而彼此不同。参数的值是根据二胺链相对于（TiNbO5）层的横向取向来解释的。跃迁l.t. áh h.t.可以用二胺的构象变化来解释，这种构象变化涉及到间扭键或扭结的形成。氨基酸赖氨酸的插入也是定量的，其特征是每个质子插入一摩尔，从而导致配方。该化合物观察到的参数的较大值来自赖氨酸分子之间形成的氢键，这确保了结构的凝聚力。
The intercalation of primary diamines in the layer structure HTiNbO5has been studied. This intercalation is quantitative and reversible: ten compounds have been synthesized corresponding to the general formula NH3(CH2)nNH(3(TiNbO5)2withn= 2–10 and 12. For each composition, two forms have been observed according to the temperature of synthesis, called low temperature (l.t.) and high temperature (h.t.), respectively. The X-ray diffraction study of these compounds shows that they are orthorhombic, withaandbparameters close to those of HTiNbO5. The l.t. and h.t. forms differ one from another by the value of thecparameter which characterizes the spacing between the (TiNbO5) layers. The values of thecparameters are interpreted in terms of a transversal orientation of the diamine chains with respect to the (TiNbO5) layers. The transition l.t. áh h.t. is explained by a conformational change of the diamine involving the formation either of gauche bonds or of kinks. The intercalation of an amino acid, lysine, is also quantitative and characterized by the intercalation of one mole per proton leading to the formulationthe greater value of thecparameter observed for this compound results from the formation of hydrogen bonds between the lysine molecules, which ensure the cohesion of the structure.