作为分子的晶体：沸石咪唑酯骨架的合成后共价功能化

Crystals as molecules: postsynthesis covalent functionalization of zeolitic imidazolate frameworks.

作者信息

Morris William, Doonan Christian J, Furukawa Hiroyasu, Banerjee Rahul, Yaghi Omar M

机构信息

Center for Reticular Chemistry, Department of Chemistry and Biochemistry, University of California-Los Angeles, 607 East Charles E. Young Drive, Los Angeles, California 90095, USA.

出版信息

J Am Chem Soc. 2008 Sep 24;130(38):12626-7. doi: 10.1021/ja805222x. Epub 2008 Aug 28.

DOI:10.1021/ja805222x

PMID:18754585

Abstract

A new crystalline zeolitic imidazolate framework, ZIF-90, was prepared from zinc(II) nitrate and imidazolate-2-carboxyaldehyde (ICA) and found to have the sodalite-type topology. Its 3D porous framework has an aperture of 3.5 A and a pore size of 11.2 A. The pores are decorated by the aldehyde functionality of ICA which has allowed its transformation to the alcohol functionality by reduction with NaBH4 and its conversion to imine functionality by reaction with ethanolamine to give ZIF-91 and ZIF-92, respectively. The N2 adsorption isotherm of ZIF-90 shows a highly porous material with calculated Langmuir and BET surface areas of 1320 and 1270 m2 g(-1). Both functionalized ZIFs retained high crystallinity and in addition ZIF-91 maintained permanent porosity (surface areas: 1070 and 1010 m2 g(-1)).

摘要

一种新型的晶体沸石咪唑酯骨架材料ZIF-90，由硝酸锌（II）和咪唑-2-甲醛（ICA）制备而成，具有方钠石型拓扑结构。其三维多孔骨架的孔径为3.5 Å，孔隙大小为11.2 Å。孔隙由ICA的醛官能团修饰，这使得它可以通过用硼氢化钠还原转化为醇官能团，以及通过与乙醇胺反应转化为亚胺官能团，分别得到ZIF-91和ZIF-92。ZIF-90的N₂吸附等温线表明它是一种高度多孔的材料，计算得到的朗缪尔比表面积和BET比表面积分别为1320和1270 m² g⁻¹。两种功能化的ZIFs都保持了高结晶度，此外，ZIF-91保持了永久孔隙率（比表面积：1070和1010 m² g⁻¹）。