Coupling of chromophores with exactly opposite luminescence behaviours in mesostructured organosilicas for high-efficiency multicolour emission. Issue 11 (4th August 2015)

• Record Type: Journal Article
• Authors: Li, Dongdong; Zhang, Yuping; Fan, Zhiying; Chen, Jie; Yu, Jihong
• Is Part Of: Chemical science. Volume 6:Issue 11(2015:Nov.)
• Page Start: 6097
• Page End: 6101
• Publication Date: 2015-08-04
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5sc02044a
• Languages: English
• ISSNs: 2041-6520

Abstract

Abstract : AIE and ACQ chromophores with exactly opposite photoluminescence behaviours are integrated in mesostructured organosilicas for multicolour emission including high-quality white light. Abstract : Aggregation-induced emission (AIE) and aggregation-caused quenching (ACQ) materials are important for various fluorescence-based applications but cannot easily collaborate because of their opposite luminescence behaviours. Here, we demonstrate a strategy to integrate AIE and ACQ chromophores in periodic mesoporous organosilicas (PMOs) for high-efficiency multicolour emission. Tetraphenylethene (TPE)-bridged AIE-PMOs are prepared as hosts to encapsulate ACQ dyes ( e.g. RhB), which enables fine-tuning of ACQ@AIE-PMO emissions over the entire visible spectrum in the solid and film states. Significantly, high-quality white light is achieved with CIE coordinates of (0.32, 0.33) and a quantum yield of up to 49.6%. Because of their high stability and solution processability, the ACQ@AIE-PMOs can be applied in solid-state lighting and bioimaging. This design concept opens up new perspectives for developing high-performance luminescent materials by the combination of a wide variety of AIE and ACQ chromophores.