新型层柱材料ZnAl─CuW11In的合成、表征及催化活性

本文用水热离子交换法首次将中心原子为铜的钨系取代型杂多阴离子［ＣｕＷ１１Ｏ３９Ｉｎ（Ｈ２Ｏ）］＾７－嵌入ＺｎＡｌ型阴离子粘土层间，通过ＸＲＤ、ＩＲ及ＥＳＲ等对柱撑产物进行了表征。ＸＲＤ研究表明柱撑产物的底面间距为１．７５ｎｍ，通道高度达１．２８ｎｍ。ＥＳＲ结果显示杂多阴离子进入粘土层间后ＣｕＯ４四面体中Ｃｕ－Ｏ键的共价性减弱。催化实验表明柱撑产物对邻苯二甲酸二辛酯（ＤＯＰ）的合成反应有较好的催化活

SYNTHESIS,CHARACTERIZATION AND CATALYTIC ACTIVITY OF NEW LAYERED MATERIAL S-P ILLARED ANION CLAY BY CuW11In

ZnA1 type anionic clay p illared w ith heteropolyanion, ZnAl-CuW₁₁In, was synthesized by m eans of hydro them al ion-exchange, and w as characterized by XRD,1R and ESR spectra. The XRD patterns show that the anionic clayprecursorpossesses a regular layer struc-ture and a good crystallinity, and the pillared derivative is provided with 2θ of 5.06° and gallery height of 1.28 nm. IR spectra exhibit that the vibration frequence and shape of het-eropolyanion existing in the layered regionsof anionic clay is sinilar to thoseof the authen-tic heteropoly salt ESR results indicate that Cu-O bond in CuO₄ tetrahedron is covalent in some degree, and there are interaction between heteropoly anion and layered region in ZnAl-CuW₁₁In. Catalytic tests show that the new pillared compound has higher catalytic activity than anion clay and heteropoly salt for DOP synthesis The reason is thatmore activecenters were produced.