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Synthesis of d-f coordination polymer nanoparticles and their application in phosphorescence and magnetic resonance
Zhiguo Zhou1, Darui Li, Hong Yang
1School of Materials Science and Engineering, University of Shanghai for Science and Technology, PR China.
Abstract:
Magneto-phosphorescent d-f coordination polymer nanoparticles (f-CPPs) were conveniently synthesized by phosphorescent carboxyl-functionalized iridium complexes as building blocks and magnetic Gd(III) ions as metallic nodes. They reveal uniform hollow spheres with an average diameter of around 60 nm and wall thickness of about 10 nm. Water soluble f-CPPs were obtained by polyvinylpyrolidone modification (denoted as f-CPPs@PVP), which had an intense red phosphorescence, moderate longitudinal relaxivity (r(1)) and low cytotoxicity. Furthermore, inductively coupled plasma atomic emission spectroscopy (ICP-AES) and confocal laser scanning microscopy (CLSM) confirmed f-CPPs@PVP could be taken up by living cells effectively. Therefore, they should be a novel nano-bioprobe for the multimodal imaging of cancer cells.
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01:14Photoluminescence: Applications
03:02Colors and Magnetism
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.