Silver Pyrazolates as Coordination‐Polymer Luminescent Metallomesogens
- 22 October 2010
- journal article
- research article
- Published by Wiley in Chemistry – A European Journal
- Vol. 16 (48), 14545-14553
- https://doi.org/10.1002/chem.201001766
Abstract
Silver pyrazolates with columnar liquid-crystal phases that are stable at room temperature have been prepared by reaction of silver nitrate with 3,5-diarylpyrazolates. The complexes consist of open-chain oligomers, despite the fact that the most common structural type for homoleptic coinage metal pyrazolates is the trimeric metallacycle [M(μ-pz)]3. The special characteristics of silver in forming reversible metal–ligand bonds in solution, evidenced experimentally, leads to supramolecular organizations in which the silver cations promote self-organization of the nonmesomorphic pyrazolates into helical 1D polymers that exhibit columnar mesophases. The materials are readily soluble in common organic solvents and are liquid-crystalline over a broader temperature range than their gold counterparts, which are known to form discrete cyclic trinuclear species. Thin films of the silver complexes show luminescence at room temperature. The compounds described here are the first examples of luminescent metallomesogens formed by a main-chain coordination polymer.Keywords
This publication has 70 references indexed in Scilit:
- Pyrazole Complexes and Supramolecular ChemistryEuropean Journal of Inorganic Chemistry, 2009
- Supramolecular architecture elucidation of the room temperature columnar mesophases exhibited by mixed-valent diruthenium alkoxybenzoatesJournal of Materials Chemistry, 2009
- Sensitization of Naphthalene Monomer Phosphorescence in a Sandwich Adduct with an Electron-Poor Trinuclear Silver(I) Pyrazolate ComplexInorganic Chemistry, 2009
- catena-Poly[silver(I)-μ-pyrazolato-κ2N:N′]Acta Crystallographica Section E: Crystallographic Communications, 2008
- Methyl 5-phenyl-1H-pyrazole-3-carboxylateActa Crystallographica Section E Structure Reports Online, 2007
- Silver(I) Complexes of Fixed, Polytopic Bis(pyrazolyl)methane Ligands: Influence of Ligand Geometry on the Formation of Discrete Metallacycles and Coordination PolymersInorganic Chemistry, 2006
- Thermotropic lanthanidomesogensChemical Communications, 2006
- CopperPublished by Elsevier BV ,2003
- Coinage metal complexes of 3,5-bis(trifluoromethyl)pyrazolate ligand: Synthesis and characterization of {[3,5-(CF3)2Pz]Cu}3 and {[3,5-(CF3)2Pz]Ag}3Journal of Fluorine Chemistry, 2000
- Powder route to crystal structures: X-ray powder diffraction determination of polymeric silver imidazolateJ. Chem. Soc., Dalton Trans., 1995