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Polymorphic forms of a gold(I) arylacetylide complex with contrasting phosphorescent characteristics
Wei Lu1, Nianyong Zhu, Chi-Ming Che
1Department of Chemistry and HKU-CAS Joint Laboratory on New Materials, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China.
Journal of the American Chemical Society
|December 18, 2003
Summary
Gold(I) arylacetylide complexes exhibit tunable phosphorescence based on molecular structure. Crystal packing and excited state nature significantly influence light emission properties in these luminescent materials.
Area of Science:
- Organometallic Chemistry
- Photophysics
- Solid-State Chemistry
Background:
- Gold(I) complexes with arylacetylide ligands are investigated for their luminescent properties.
- Understanding structure-property relationships is crucial for designing novel phosphorescent materials.
Purpose of the Study:
- To examine the spectroscopic properties and crystal structures of gold(I) arylacetylide complexes.
- To correlate molecular and crystal structure with observed phosphorescence.
Main Methods:
- Spectroscopic analysis (UV-Vis absorption and emission)
- X-ray crystallography
- Variable temperature luminescence studies
Main Results:
- Two polymorphs of a gold(I) complex [(R(3)P)Au(Ctbd1;CAr)] were identified with distinct phosphorescent behaviors.
- Emissive properties are linked to the orientation of molecular dipoles and dihedral angles between arylacetylide moieties.
- Complexes 2-4 and the emissive polymorph of 1 show strong phosphorescence at room temperature.
Conclusions:
- The phosphorescent characteristics of these gold(I) arylacetylide crystals are determined by excited state nature and intermolecular interactions.
- Crystal packing, specifically the dihedral angle between adjacent lumophores, plays a critical role in modulating luminescence.
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