De novo synthesis and particle size control of iron metal organic framework for diclofenac drug delivery

Pamela Berilyn So, Hsin Tsung Chen*, Chia Her Lin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)


Metal organic frameworks (MOFs) possess lots of potential but what limits its applicability in the industrial setting is the sustainability of its preparation. This work features room temperature synthesis of MIL-100(Fe) without using toxic organic solvents and strong acids. Using varying ratio of trimesic acid (BTC) to diclofenac (DCF) as ligand during synthesis, DCF was directly incorporated within the MIL-100(Fe) framework. The products synthesized showed similar PXRD patterns with the calculated value for MIL-100(Fe). The de novo synthesized products (D1-D5) were compared to conventional DCF loading in MIL-100(Fe) (DCF@MIL) wherein they show comparable characteristics. SEM images also confirmed that the octahedral morphology of MIL-100(Fe) was preserved even when DCF substituted some BTC as ligand. DCF release in simulated body fluids were determined and showed sustained release over a 24-h period at pH 7.4. On the other hand, negligible release was observed at pH 1.2 which is favorable as DCF can be protected from enzymatic degradation in the stomach, thus more DCF can be delivered to the systemic circulation. Among the synthesized bio-MOFs, D2 showed promising results with 20% loading capacity and 94% entrapment efficiency. Controlled particle size (100–400 nm) with varied reaction time was achieved with DCF acting as modulator. Results showed that longer reaction time yielded larger particle size, higher porosity, and enhanced drug release. This study demonstrates the versatility of DCF wherein aside from being the active drug, it may also act as modulator in MOF synthesis for particle size control.

Original languageEnglish
Article number110495
JournalMicroporous and Mesoporous Materials
Publication statusPublished - 2020 Dec 15


  • Diclofenac
  • Drug delivery
  • Metal organic framework
  • Modulation

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials


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