期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 23, 期 18, 页码 4310-4319出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201604741
关键词
aggregation; colloids; fluorescence; imaging; agents; nanoparticles
资金
- start-up grant of Nanyang Assistant Professorship from Nanyang Technological University [M4080992.120]
- AcRF Tier 2 from the Ministry of Education, Singapore [ARC 36/13]
- NTU-Northwestern Institute for Nanomedicine [M4081502.F40]
Colloidal nanoparticles (NPs) containing near-infrared-fluorescent J-aggregates (JAGGs) of pyrrolopyrrole cyanines (PPcys) stabilized by amphiphilic block co-polymers were prepared in aqueous medium. JAGG formation can be tuned by means of the chemical structure of PPcys, the concentration of chromophores inside the polymeric NPs, and ultrasonication. The JAGG NPs exhibit a narrow emission band at 773 nm, a fluorescence quantum yield comparable to that of indocyanine green, and significantly enhanced photostability, which is ideal for long-term bioimaging.
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