Zr oxide/nanographene hybrid solid is stable in saturated NaOH and concentrated H3PO4, allowing a convenient anchoring of H3PO4 into its porous matrix to enable size-selective heterogeneous acid catalysis. The Zr oxide components can also be removed by strong hydrofluoric acid to further enhance the surface area (up to 650 m2 g−1), without collapsing the nanographene scaffold. The crystallinity order
我们报告了一个Zr(IV)-
羧酸盐骨架的奇特的案例研究,该骨架在其连接物组分进行级联热环化后,尤其是在关键的
羧酸酯键被热切断后,仍保留了重要的结晶顺序。剧烈热处理(例如,450°C及以上)使连接基上的多个炔基团苯环化,生成连接的纳米
石墨烯嵌段并提供真正的稳定性。所得的Zr氧化物/纳米烯杂化固体在饱和NaOH和浓H 3 PO 4中稳定,从而可以方便地锚定H 3 PO 4进入其多孔基质以实现尺寸选择的异质酸催化。还可以通过强
氢氟酸去除Zr氧化物组分,以进一步增加表面积(最大650 m 2 g -1),而不会塌陷纳米
石墨烯支架。通过X射线衍射,扫描透射电子显微镜(S
TEM),IR,固态NMR和其他仪器方法表征了结晶度顺序和广泛的热转变。