Premium
The Co‐Assembly of Polyoxometalates and Quantum Dots for Hybrid Core‐Shell Nanoparticles
Author(s) -
Hu Jie,
Li Mu,
Chen Kun,
Yin Panchao
Publication year - 2019
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201900498
Subject(s) - chemistry , quantum dot , photoluminescence , nanoparticle , small angle x ray scattering , transmission electron microscopy , nanocomposite , phase (matter) , electron transfer , scattering , nanotechnology , self assembly , luminescence , hybrid material , chemical engineering , shell (structure) , photochemistry , optoelectronics , materials science , optics , organic chemistry , composite material , physics , engineering
A co‐assembly protocol of quantum dots (QDs)‐polyoxometalates (POMs) hybrids is developed using Keggin‐type POMs as surface capping ligands. Phase transfer strategy is used to prepare POM‐QDs nanocomposites. These newly developed hybrid materials have been explored for their optical properties and aggregation behavior in solutions. UV/Vis and FT‐IR are used to reveal the optical properties of POM‐QDs. Small‐angle X‐ray scattering (SAXS) and transmission electron microscopy (TEM) are applied to characterize the co‐assembled core‐shell structures of POM‐QDs complexes under different reaction conditions. A general trend to be noted is that the average photoluminescence (PL) lifetime of QDs decreases after phase transfer. The lifetime attenuation is caused by the surface property change of newly obtained POM‐QDs complexes, which is resulted from the changed band edge recombination and shallow trap assisted recombination.