Hybrid Dendritic Molecules with Confined Chromophore Architecture to Tune Fluorescence Efficiency

被引:27
作者
Andre, Pascal [1 ,3 ]
Cheng, Ge [2 ,3 ]
Ruseckas, Arvydas [1 ,3 ]
van Mourik, Tanja [2 ]
Fruechtl, Herbert [2 ]
Crayston, Joe A. [2 ,3 ]
Morris, Russell E. [2 ]
Cole-Hamilton, David [2 ,3 ]
Samuel, Ifor D. W. [1 ,3 ]
机构
[1] Univ St Andrews, Sch Phys & Astron, SUPA, St Andrews KY16 9SS, Fife, Scotland
[2] Univ St Andrews, Sch Chem, EaStCHEM, St Andrews KY16 9ST, Fife, Scotland
[3] Univ St Andrews, Organ Semicond Ctr, St Andrews KY16 9SS, Fife, Scotland
基金
英国工程与自然科学研究理事会;
关键词
D O I
10.1021/jp806031q
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 aim of this publication is to present a general strategy to engineer more efficient photoluminescent dendritic molecules based on polyhedral oligomeric silsesquioxane (POSS) cores. A series of chromophores were grafted on POSS cores to form dendritic molecules for which steric hindrance was used as a trigger to tune their photophysical properties. For fluorescence in the blue/near-UV spectral ranges, 4-vinylbiphenyl molecules were chosen as model chromophores to present a general approach based on stable chemistry and bulky groups grafted to the chromophores to enhance photoluminescence efficiency of the dendritic molecules. Photoluminescence quantum yields as well as steady-state and time-resolved solution spectroscopy along with molecular dynamics investigation and electronic structure calculations on a family of new materials are reported. We highlight an apparent contrast between free chromophore and dendritic molecules photophysical properties and show that chromophores' engineering and confinement around an inorganic core allows the design of more efficient photoluminescent dendritic molecules relevant to sensors and hybrid light-emitting diodes.
引用
收藏
页码:16382 / 16392
页数:11
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