Photoinduced Energy and Electron Transfer Between a Photoactive Cage Based on a Thermally Activate Delayed Fluorescence Ligand and Encapsulated Fluorescent Dyes

被引：28
|
作者：
Martir, Diego Rota [1 ]
Pizzolante, Antonella [1 ]
Escudero, Daniel [2 ]
Jacquemin, Denis [2 ]
Warriner, Stuart L. [3 ]
Zysman-Colman, Eli [1 ]
机构：
[1] Univ St Andrews, EaStCHEM Sch Chem, Organ Semicond Ctr, St Andrews KY16 9ST, Fife, Scotland
[2] Univ Nantes, CNRS, CEISAM UMR 6230, 2 Rue Houssiniere,BP 92208, F-44322 Nantes 3, France
[3] Univ Leeds, Sch Chem, Woodhouse Lane, Leeds LS2 9JT, W Yorkshire, England
来源：
ACS APPLIED ENERGY MATERIALS | 2018年 / 1卷 / 06期
基金：
欧盟地平线“2020”; 英国工程与自然科学研究理事会;
关键词：
photoactive cage; TADF ligand; encapsulation of dyes; energy and electron transfer; white-emitting assembly; METAL-ORGANIC TETRAHEDRON; MOLECULAR CAPSULE; PH-DEPENDENCE; LUMINESCENT; ABSORPTION; EMISSION; PHENOLPHTHALEIN; POLYHEDRA; STRATEGY; ACCEPTOR;
D O I：
10.1021/acsaem.8b00732
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The vast majority of polyhedral assemblies prepared by combining organic bent ligands and "photophysically innocent" palladium(II) metal ions are nonemissive. We report here a simple strategy to switch on the luminescence properties of a polyhedral assembly by combining a thermally activated delayed fluorescence (TADF) organic emitter based on a dipyridylcarbazole ligand scaffold with Pd2+ ions, giving rise to a luminescent Pd6L12 molecular cube. The assembly is capable of encapsulating within its cavity up to three molecules per cage of fluorescein, in its neutral lactone form, and up to two molecules of Rose Bengal in its dianionic quinoidal form. Photoinduced electron transfer (PeT) between the photoactive cage and the encapsulated Fluorescein and photoinduced energy transfer (PET) from the cage to encapsulated Rose Bengal have been observed by steady-state and time-resolved emission spectroscopy.
引用
收藏
页码：2971 / 2978
页数：15
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