Mesoscopic FRET Antenna Materials by Self‐Assembling Iridium(III) Complexes and BODIPY Dyes. Issue 46 (18th July 2018)

• Record Type: Journal Article
• Authors: Bagnall, Andrew J.; Santana Vega, Marina; Martinelli, Jonathan; Djanashvili, Kristina; Cucinotta, Fabio
• Is Part Of: Chemistry. Volume 24:Issue 46(2018)
• Page Start: 11992
• Page End: 11999
• Publication Date: 2018-07-18
• Subjects: energy transfer -- host-guest systems -- light-harvesting -- luminescence -- mesoporous materials; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201802745
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: This study presents a new design of light‐harvesting antenna materials using two dyes organised into mesoporous silica: an iridium(III) complex and a BODIPY‐derived surfactant that undergo Förster resonance energy transfer (FRET), acting, respectively, as donor and acceptor. The chemical structure of each dye determines the position taken within the micellar templates used for the synthesis of the silica host, which maintains mesopore order as shown by TEM imaging. Steady‐state and time‐resolved UV‐visible spectroscopy revealed that incorporation of the iridium complex into the silica shields it from oxygen‐induced quenching and allows a degree of control over the donor–acceptor distance, yielding FRET efficiencies from 24 to 76 % and tuneable emission ranges. Such silica‐based antennae show promising properties for the realisation of polychromatic sensitisers for photovoltaics and photocatalysis. Abstract : Live and let dye : Multi‐chromophoric antennae can be prepared by self‐assembling dyes into mesoscopic silica materials. Varying the content and localisation of energy donors and acceptors within a micellar template used for silica allows a degree of control over their relative distance, yielding FRET efficiencies from 24 to 76 % and tuneable emission in the visible range.