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Amide Coupling Reaction for the Synthesis of Bispyridine-based Ligands and Their Complexation to Platinum as Dinuclear Anticancer Agents
Published on: May 28, 2014
Anion dependent mesomorphism in coordination networks based on 2,2'-bipyridine silver(I) complexes
Anna Bellusci1, Mauro Ghedini, Loris Giorgini
1Centro di Eccellenza CEMIF.CAL-LASCAMM, CR-INSTM Unità della Calabria, Dipartimento di Chimica, Università della Calabria, Via P. Bucci Cubo 14C, Italy.
The anion type dictates the structure and mesomorphic behavior of silver(I) complexes with dihexadecyl-2,2'-bipyridine-4,4'-dicarboxylate (L16). One-dimensional coordination networks induce argentophilic interactions, leading to lamello-columnar mesomorphism.
Area of Science:
- Coordination Chemistry
- Supramolecular Chemistry
- Materials Science
Background:
- Dihexadecyl-2,2'-bipyridine-4,4'-dicarboxylate (L16) is a promesogenic ligand.
- Silver(I) complexes are known for diverse structural motifs and potential applications.
Purpose of the Study:
- To synthesize and characterize novel silver(I) complexes with L16.
- To investigate the influence of various anions (sac, NO3, OTf, ClO4) on the stoichiometry, molecular architecture, and supramolecular networks.
- To understand the relationship between structural features and mesomorphic behavior.
Main Methods:
- Synthesis of silver(I) complexes with L16 and different silver salts.
- Single-crystal X-ray diffraction for structural analysis.
- Mesomorphic behavior studies.
Main Results:
- Formation of four silver(I) complexes: [(L16)Ag(sac)], 1, [(L16)Ag(NO3)], 2, [(L16)Ag(OTf)], 3, and [(L16)3Ag2](ClO4)2, 4.
- Anion-dependent variations in stoichiometry, molecular architecture, and supramolecular networks were observed.
- One-dimensional coordination networks in complexes 3 and 4 were crucial for inducing argentophilic interactions.
- These interactions led to lamello-columnar mesomorphism in the silver(I) triflate and perchlorate derivatives.
Conclusions:
- The mesomorphic behavior of L16-based silver(I) complexes is strongly anion-dependent.
- Anion-directed formation of specific coordination networks is key to inducing desirable supramolecular interactions and mesomorphism.
- This study provides insights into the design of functional coordination materials.
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