Luminescence Tribochromism and Bright Emission in Gold(I) Thiouracilate Complexes
- 5 June 2003
- journal article
- Published by American Chemical Society (ACS) in Journal of the American Chemical Society
- Vol. 125 (26), 7778-7779
- https://doi.org/10.1021/ja034560k
Abstract
New dinuclear Au(I) complexes containing bridging thiouracilate and bis(diphenylphosphino)methane ligands have been synthesized and characterized structurally and spectroscopically. The compounds exhibit a unique behavior of solid-state luminescence tribochromism in which photoemission turns on upon gentle grinding of the sample and a sensitivity to pH in fluid solution. The emissive form in the solid state exhibits a bright blue or cyan emission upon irradiating at 375 nm. Structural studies show that the nonemissive form of the complexes has an extended helical ···Au···Au···Au··· structure in the solid with weak aurophilic interactions, whereas the blue emissive form has a strong intermolecular aurophilic interaction in the solid that leads to an arrangement of dimers of dinuclear (Au2) complexes. Interconversion between the two forms can be carried out by either recrystallization for solid-state samples or by exposure to vapors of volatile acid or base for fluid solutions of the complexes.Keywords
This publication has 8 references indexed in Scilit:
- Syntheses, Structure, and Photoluminescence Properties of the 1-Dimensional Chain Compounds [(TPA)2Au][Au(CN)2] and (TPA)AuCl (TPA = 1,3,5-Triaza-7-phosphaadamantane)Inorganic Chemistry, 2002
- Supramolecular Gold(I) Thiobarbiturate Chemistry: Combining Aurophilicity and Hydrogen Bonding to Make Polymers, Sheets, and NetworksInorganic Chemistry, 2002
- Going for goldNature, 2001
- Organic photochromism (IUPAC Technical Report)Pure and Applied Chemistry, 2001
- Photophysical and Photochemical Properties of Gold(l) ComplexesPublished by Springer Nature ,1999
- Linear Chain Au(I) Dimer Compounds as Environmental Sensors: A Luminescent Switch for the Detection of Volatile Organic CompoundsJournal of the American Chemical Society, 1998
- Solvent‐Stimulated Luminescence from the Supramolecular Aggregation of a Trinuclear Gold(I) Complex that Displays Extensive Intermolecular AuċAu InteractionsAngewandte Chemie International Edition in English, 1997
- Strong Closed-Shell Interactions in Inorganic ChemistryChemical Reviews, 1997