School of Natural and Environmental Sciences, Newcastle University, Bedson Building, Queen Victoria Road, Newcastle upon Tyne, NE1 7RU, UK.
Department of Biotechnology, Delft University of Technology, Van der Maasweg 9, 2629, HZ, Delft, The Netherlands.
Chemistry. 2018 Aug 14;24(46):11992-11999. doi: 10.1002/chem.201802745. Epub 2018 Jul 18.
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.
本研究提出了一种使用两种染料设计新型的光捕获天线材料，这两种染料分别为：一个铱（III）配合物和一个 BODIPY 衍生的表面活性剂，它们之间发生Förster 共振能量转移（FRET），分别作为供体和受体。每个染料的化学结构决定了它们在用于合成二氧化硅主体的胶束模板中的位置，TEM 成像表明该结构保持了介孔有序性。稳态和时间分辨的紫外-可见光谱表明，将铱配合物掺入到二氧化硅中可以防止其受到氧诱导的猝灭，并在一定程度上控制供体-受体之间的距离，从而产生 24%至 76%的能量转移效率和可调谐的发射范围。这种基于二氧化硅的天线在实现用于光电和光催化的多色敏化剂方面具有广阔的应用前景。
