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Structure and Coordination Determination of Peptide-metal Complexes Using 1D and 2D 1H NMR
Published on: December 16, 2013
A one-dimensional coordination polymer based on a di-Schiff base supported trinuclear CuII subunit
Liangliang Zhang1, Fuling Liu, Shuai Yuan
1Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong, People's Republic of China.
A novel one-dimensional copper(II) coordination polymer was synthesized using a di-Schiff base ligand. This polymer forms chains via trinuclear copper subunits linked by a Cu(2)O(2) unit, stabilized by hydrogen bonds and π-π stacking.
Area of Science:
- Coordination Chemistry
- Materials Science
- Crystallography
Background:
- Schiff base ligands are versatile in coordinating metal ions.
- One-dimensional coordination polymers exhibit unique magnetic and optical properties.
- Copper(II) complexes are widely studied for their diverse structures and applications.
Purpose of the Study:
- To synthesize and characterize a novel one-dimensional copper(II) coordination polymer.
- To investigate the structural features of the trinuclear copper(II) subunit and the overall chain architecture.
- To explore the role of hydrogen bonding and π-π stacking in crystal packing.
Main Methods:
- Single-crystal X-ray diffraction analysis was employed to determine the crystal structure.
- The synthesis involved the reaction of a di-Schiff base ligand with copper(II) salts.
- Structural characterization included analysis of coordination geometries, bridging units, and intermolecular interactions.
Main Results:
- A novel one-dimensional copper(II) coordination polymer, [Cu(3)(C(14)H(10)N(2)O(4))(2)(CH(3)OH)(2)](n), was successfully constructed.
- The polymer features centrosymmetric trinuclear copper(II) subunits with varying coordination geometries (square-pyramidal and octahedral).
- A Cu(2)O(2) unit links these subunits into chains, further stabilized by intramolecular hydrogen bonds and interchain π-π stacking.
Conclusions:
- The synthesized compound represents a new example of a one-dimensional copper(II) coordination polymer.
- The intricate structure, involving heptadentate ligands and specific bridging units, dictates the polymer's dimensionality.
- Hydrogen bonding and π-π stacking interactions are crucial for the stability of the crystal lattice.
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