Synthesis and aldehyde absorption properties of aspartate-octacalcium phosphate inclusion compound
Synthesis and aldehyde absorption properties of aspartate-octacalcium phosphate inclusion compound
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DOI：
10.1016/j.jpcs.2003.10.030
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发表时间：
2004-02-01
影响因子：
4
通讯作者：
Suganuma, K
中科院分区：
文献类型：
--
作者：
Aoki, S;Nakahira, A;Suganuma, K
以α-磷酸三钙（alpha-Ca-3（PO 4）（2）; alpha-TCP）为原料，在天冬氨酸钠存在下水解，合成了磷酸八钙（Ca-8（HPO 4）（2）（PO 4）（4）·5 H（2）O; OCP）和天冬氨酸（-OOCCH 2CH（NH 2）COO-; Asp）复盐。所得包合物（Asp-OCP包合物）的组成式为Ca-8（HPO 4）（1.28）（C4 H5 NO 4）（0.72）（PO 4）（4）.6.3H（2）O，其包含的天冬氨酸含量高于我们的前一篇论文。Asp-OCP包合物在层间与醛类化合物发生包合反应。在甲醛气体吸附实验中，Asp-OCP包合物的吸附量约为活性炭的2倍（对于Asp-OCP包合物：3.1 x 10（-3）mol/g，活性炭：1.6 × 10（-3）mol/g），尽管Asp-OCP包合物的BET比表面积约为活性炭的三十分之一（Asp-OCP包合物：43 m2/g，活性炭：1225 m2/g）。当使用乙醛和叶醛在较高浓度下进行气体吸收实验时，在FT-IR和固态C-13-NMR谱中观察到在层间形成亚胺。(C)2003爱思唯尔有限公司。保留所有权利。
Double salt of octacalcium phosphate (Ca-8(HPO4)(2)(PO4)(4).5H(2)O; OCP) and aspartate (-OOCCH2CH(NH2)COO-; Asp) was synthesized by hydrolysis of alpha-tricalcium phosphate (alpha-Ca-3(PO4)(2); alpha-TCP) in the presence of sodium aspartate. The compositional formula of the obtained inclusion compound (Asp-OCP inclusion compound) was Ca-8(HPO4)(1.28)(C4H5NO4)(0.72)(PO4)(4).6.3H(2)O, which included higher content of aspartate than that in our precedent paper. Asp-OCP inclusion compound reacted with aldehdyes in the interlayer. In the absorption experiments using formaldehyde gas, the amounts of absorption for Asp-OCP inclusion compound was approximately twice as that for activated charcoal (for Asp-OCP inclusion compound: 3.1 x 10(-3) mol/g, activated charcoal: 1.6 x 10(-3) mol/g), in spite that the BET specific surface area of Asp-OCP inclusion compound was approximately one-thirtieth part of that of activated charcoal (Asp-OCP inclusion compound: 43 m(2)/g, activated charcoal: 1225 m(2)/g). When the gas absorption experiments using acetaldehyde and leaf aldehyde under higher concentrations were carried out, the imine formation in the interlayer were observed in FT-IR and solid state C-13-NMR spectra. (C) 2003 Elsevier Ltd. All rights reserved.