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Gold complexes with the selenolate ligand [2-(Me2NCH2)C6H4Se]-
Olga Crespo1, M Concepción Gimeno, Antonio Laguna
1Departamento de Química Inorgánica, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-C.S.I.C., E-50009 Zaragoza, Spain.
Inorganic Chemistry
|March 31, 2009
Summary
This study synthesizes novel gold-selenolate complexes with varying structures and luminescence properties. These findings offer insights into gold complex aggregation and potential applications in structural prediction.
Area of Science:
- Organometallic Chemistry
- Coordination Chemistry
- Materials Science
Background:
- Gold complexes with phosphine ligands are crucial in catalysis and medicine.
- Selenolate ligands offer unique electronic and steric properties for metal complexation.
- Understanding the structural diversity and luminescence of gold-selenolates is key for developing new materials.
Purpose of the Study:
- To synthesize and characterize novel mononuclear and dinuclear gold-selenolate complexes.
- To investigate the structural frameworks and intermolecular interactions of these gold complexes.
- To explore the luminescence properties and potential applications of the synthesized gold-selenolate species.
Main Methods:
- Reaction of alkali metal selenolates with gold(I) phosphine complexes.
- Synthesis of gold(III) complexes using organometallic precursors.
- Crystallographic analysis to determine structural features.
- Luminescence spectroscopy to study emission properties.
Main Results:
- Successfully synthesized mononuclear gold-selenolate species [Au{SeC6H4(CH2NMe2)-2}(PPh3)] (1) and [Au{SeC6H4(CH2NMe2)-2}(PPh2py)] (2).
- Prepared dinuclear gold-selenolate complexes [Au2{SeC6H4(CH2NMe2)-2}2(mu-P-P)] (3-5) with varying bridging phosphine ligands (dppm, dppe, dppf).
- Observed distinct structural motifs, including polymeric chains with aurophilic bonding in 4 and intramolecular Au(I)...Au(I) interactions in 5.
- Synthesized a gold(III) derivative, Bu4N[Au(C6F5)3{SeC6H4(CH2NMe2)-2}] (6).
- Demonstrated luminescence in these complexes, likely originating from mixed excited states.
- Proposed intermolecular aggregation in solid-state and frozen solutions for complexes 1, 2, and 3 based on emission properties.
Conclusions:
- The study successfully synthesized a series of novel gold-selenolate complexes with diverse structural characteristics.
- The luminescence properties of these complexes are linked to their structural features and aggregation behavior.
- These findings suggest potential for using gold-selenolate complexes in structural prediction and materials science applications.
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