Synthesis of MOF having functional side group

For the preparation of MOFs which can be modified via postsynthetic modification, a homologous series of p-terphenyl-4,4′-dicarboxylic acid having hydroxyl side groups, ranging from 0 to 4, as functional groups have been synthesized. Then the modified IRMOF-16, named as HCC-1, has been successfully synthesized via solvothermal and microwave method using 1,4-di(4-carboxy-2-hydroxyphenyl)benzene as organic ligand and Zn(NO3)2·6H2O as metal source, respectively. A series of structural analyses have identified that it has the same crystal structure and dimensions as those of IRMOF-16. Despite the successful synthesis, conventional method of activation did not proved to be adequate for HCC-1 because of structural collapse. However, this problem could be minimized with the help of continuous CO2 supercritical drying (SCD) process.

Graphical abstractModified IRMOF-16 (HCC-1) has been successfully synthesized via solvothermal and microwave method using 1,4-di(4-carboxy-2-hydroxyphenyl)benzene as organic ligand and Zn(NO3)2·6H2O as metal source, respectively.Figure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights► Modified IRMOF-16 (HCC-1) was synthesized via solvothermal and microwave methods. ► CO2 supercritical drying proved to be powerful method for the activation of HCC-1. ► Structure of HCC-1 was systematically investigated.