TOPOLOGY GUIDED DESIGN AND SYNTHESES OF HIGHLY STABLE MESOPOROUS PORPHYRINIC ZIRCONIUM MOFS WITH ULTRAHIGH SURFACE AREA

摘要

Mesoporous metal-organic frameworks (MOFs) have attractedngreat interest in versatile application, such as catalysis, gas storagenand separation and luminescence.1 However, compared with thenwell-explored microporous MOFs, mesoporous MOFs are relativelynunder-developed. This is ascribed to the difficulty in organic linkernextension, challenges in activation of MOFs with ultra-large pores, asnwell as the common appearance of undesired interpenetration.2nMoreover, the stability of the framework becomes difficult tonmaintain after extension of the organic linker, especially fornmesoporous materials whose applications are usually conductednunder aqueous or harsh chemical environments. To improve thenchemical stability of MOFs, hard Lewis acidic species such as Al3+,nFe3+, Cr3+ and Zr4+, which can form much stronger bonds withncarboxylates, are often incorporated.3 Despite this adjustment, asnisoreticular chemistry is applied to augment the internal cavity ofnknown MOF structures, the pore size and stability are usuallyninversely correlated.