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Updated: Jun 9, 2026

Surface Functionalization of Metal-Organic Frameworks for Improved Moisture Resistance
Published on: September 5, 2018
Stabilization of acyclic water tetramer in a copper(II) malonate framework structure
Megha S Deshpande1, Avinash S Kumbhar, Christian Näther
1Department of Chemistry, University of Pune, Pune, 411 007, India.
A novel copper(II) complex, [Cu(dpq)(mal)(H2O)]·3H2O, was synthesized and characterized. This complex acts as a building block for a 3D metal-organic framework (MOF) and can cleave DNA via a hydroxyl group.
Area of Science:
- Coordination Chemistry
- Materials Science
- Biochemistry
Background:
- Metal-organic frameworks (MOFs) offer versatile structures for various applications.
- Copper complexes are known for their catalytic and biological activities.
- Understanding the structure-activity relationship of novel complexes is crucial for developing new materials and catalysts.
Purpose of the Study:
- To synthesize and characterize a new copper(II) complex with dipyrido-[3,2-d:2',3'-f]-quinoxaline (dpq) and malonato (mal) ligands.
- To investigate the supramolecular structure and framework formation of the synthesized complex.
- To explore the DNA cleavage activity mediated by the copper(II) complex.
Main Methods:
- Synthesis and characterization using elemental analysis, infrared spectroscopy, and thermogravimetric analysis.
- Single-crystal X-ray crystallography to determine the molecular and crystal structure.
- Plasmid DNA cleavage assays under dark conditions.
Main Results:
- The copper(II) complex [Cu(dpq)(mal)(H2O)]·3H2O was successfully synthesized and characterized.
- X-ray crystallography revealed a square pyramidal structure, forming a 3D MOF with encapsulated water tetramers.
- The complex demonstrated hydrolytic cleavage of plasmid pBR322 DNA, mediated by a copper(II) bound hydroxyl group.
Conclusions:
- The synthesized copper(II) complex serves as a building block for a robust 3D MOF.
- The complex exhibits DNA cleavage activity, highlighting its potential in biochemical applications.
- The study provides insights into the structural and functional properties of novel copper-based MOFs.
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