Preparation of highly oriented organic–LDH hybrid films by combining the decarbonation, anion-exchange, and delamination processes
Preparation of highly oriented organic–LDH hybrid films by combining the decarbonation, anion-exchange, and delamination processes
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DOI：
10.1039/b601346e
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发表时间：
2006-04
影响因子：
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通讯作者：
Kentaro Okamoto;T. Sasaki;T. Fujita;N. Iyi
中科院分区：
文献类型：
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作者：
Kentaro Okamoto;T. Sasaki;T. Fujita;N. Iyi
为了制备Mg/Al = 2和3的高取向有机- LDH（层状双氢氧化物）薄膜，制备了具有阴离子交换性的高取向LDH薄膜(a)通过将CO32 - LDH水悬浮液浇铸到玻璃载玻片上，然后在nacl溶液中脱碳并阴离子交换到ClO4 - LDH，以及(b)在甲酰胺（FA）中浇铸分层ClO4 - LDH到玻璃载玻片上。这些在玻璃衬底上形成的ClO4 - LDH薄膜被对甲苯磺酸阴离子（Tos -）进一步阴离子交换，生成具有保留取向和透明度的有机- LDH杂化膜。在FA中成功地进行了Tos - LDH的直接分层，并通过将胶体的Tos - LDH溶液浇铸在玻片上获得了高取向的Tos - LDH杂化膜。这三种方法都能得到取向良好的有机ldh薄膜，特别是分层处理的方法能得到更致密和透明的薄膜。
For the preparation of highly-oriented thin films of organic–LDHs (layered double hydroxides) with Mg/Al = 2 and 3, highly-oriented LDH films with anion-exchangeability were prepared (a) by casting a CO32−LDH water suspension onto a glass slide, followed by decarbonation in an HCl–NaCl solution and anion-exchange to ClO4−LDH, and (b) by casting delaminated ClO4−LDH in formamide (FA) onto a glass slide. These ClO4−LDH films formed on glass substrates were further anion-exchanged by p-toluenesulfonate anions (Tos−) to produce organic–LDH hybrid films with retention of their orientation and transparency. The direct delamination of Tos−LDH in FA was also successfully conducted, and a highly-oriented Tos−LDH hybrid film was obtained by casting the colloidal Tos−LDH solution on a glass slide. These three procedures offered well-oriented organic–LDH films, and especially, the process involving the delamination treatments gave more dense and transparent films.