Reversed crystal growth of RHO zeolite imidazolate framework (ZIF)

Katherine Self, Michael Telfer, Heather Frances Greer, Wuzong Zhou

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)
2 Downloads (Pure)


RHO zeolitic imidazolate framework (ZIF), Zn1.33(O.OH)0.33(nim)1.167(pur), crystals with a rhombic dodecahedral morphology were synthesized by a solvothermal process. The growth of the crystals was studied over time using scanning electron microscopy (SEM), transmission electron microscopy (TEM), powder X-ray diffraction (PXRD) and Brunauer–Emmett–Teller (BET) analyses, and a reversed crystal growth mechanism was revealed. Initially, precursor materials joined together to form disordered aggregates, which then underwent surface recrystallization forming a core–shell structure, in which a disordered core is encased in a layer of denser, less porous crystal. When the growth continued, the shell became less and less porous, until it was a layer of true single crystal. The crystallization then extended from the surface to the core over a six-week period until, eventually, true single crystals were formed.

Original languageEnglish
Pages (from-to)19090–19095
Number of pages6
JournalChemistry - A European Journal
Issue number52
Early online date18 Nov 2015
Publication statusPublished - 21 Dec 2015


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