Using a diphenyl-bi-(1,2,4-triazole) tricarbonylrhenium(<scp>i</scp>) complex with intramolecular π–π stacking interaction for efficient solid-state luminescence enhancement
Alexandre Poirot, Corinne Vanucci‐Bacqué, Béatrice Delavaux‐Nicot, Clarisse Meslien, Nathalie Saffon‐Merceron, Charles-Louis Serpentini, Florence Bedos‐Belval, Éric Benoist, Suzanne Fery‐Forgues
Abstract
〉 = 713 ns), and thus a dramatic solid-state luminescence enhancement (SLE) effect. These attractive emission properties can be attributed to the fact that the molecule undergoes little distortion between the ground state and the triplet excited state, as well as to a favorable intermolecular arrangement that minimizes detrimental interactions in the crystal lattice. The aggregation-induced phosphorescence emission (AIPE) effect was clear, with a 7-fold increase in emission intensity at 546 nm, although the aggregates formed in aqueous medium were much less emissive than the native microcrystalline powder. In this work, the rigidity of the Re-BPTA complex is reinforced by the intramolecular π-π stacking interaction of the phenyl rings. This original concept provides a rhenium tricarbonyl compound with very good SLE properties, and could be used more widely to successfully develop this area of research.