Journal
POLYMER CHEMISTRY
Volume 6, Issue 21, Pages 3962-3969Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5py00344j
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Funding
- National Natural Science Foundation of China [21174061, 51173078, 21172106, 21474048]
- open project of Beijing National Laboratory for Molecular Sciences
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A novel chiral conjugated polymer is developed and used for the preparation of conjugated polymer nanoparticles (CPNs) with particle sizes ranging from 80 to 190 nm. The size-dependent optical properties of chiral CPNs are fully studied and it was found that the nanoparticles exhibited a prominent red shift both in UV-vis and fluorescence emission with increasing diameters. The circular dichroism (CD) spectra and anisotropy r values of the CPNs display size-tunable chirality features, which can be attributed to the nature of the aggregates as nanoparticles grow. Meanwhile, the obtained CPNs can serve as efficient far-red/near-infrared (FR/NIR) fluorescent probes with low cytotoxicity and high photostability for HeLa cell imaging.
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