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231225s2019 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.9b01631
|2 doi
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|a pubmed24n0998.xml
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|a DE-627
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| 041 |
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|a eng
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| 100 |
1 |
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|a Choudhury, Pritam
|e verfasserin
|4 aut
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| 245 |
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|a Carbon Dots-Stimulated Amplification of Aggregation-Induced Emission of Size-Tunable Organic Nanoparticles
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|c 2019
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|a Text
|b txt
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Completed 25.06.2020
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|a Date Revised 25.06.2020
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a Carbon dots (CDs)-induced microstructural modulation and amplification of emission intensity of self-aggregated fluorescent organic nanoparticles (FONPs) is a challenging task since CD is a well-known fluorescence quencher. In the present study, we have designed l-tyrosine-tagged hydrophobically (C-10) tailored naphthalene diimide derivative (NDI-i), which formed FONPs in tetrahydrofuran (THF)-water binary solvent mixture. NDI-i exhibited aggregation-induced emission (AIE) at 580 nm (orange) up to fw = 70 vol % of water in THF via excimer formation in combination with intramolecular charge transfer (ICT) upon excitation at 350 nm. Beyond fw = 70 vol %, the emission intensity gradually reduced up to fw = 99 vol % due to poor water dispersibility of NDI-i FONPs. Doping of hydrophobically (C-2 to C-11 alkyl chain) surface-functionalized CDs (CD-i-iii) within self-aggregates of NDI-i FONPs at fw = 99 vol % resulted in the modulation of both morphology and emission intensity of resulting self-assembled nanoconjugate. In the presence of C-2 alkyl chain tethered CD, the emission intensity of FONP-CD nanohybrid got quenched compared to that of native NDI-i FONPs. The emission intensity of NDI-i FONPs markedly enhanced by 3.6- to 5.0-fold upon inclusion of C-6 and C-11 alkyl chain containing CDs, respectively. Increasing the alkyl chain length on CD surface facilitated the interchain hydrophobic interaction between the organic nanoparticles and surface-functionalized CDs to form larger CD-doped fused FONPs. The extent of ICT between π-donor and π-acceptor residues became more efficient to exhibit enhanced AIE due to the accumulation of more NDI-i around CD surface through interchain hydrophobic interaction. The C-11 alkyl chain containing CD-integrated FONPs showed the brightest orange emission with superior aqueous stability. These water-dispersible, orange-emitting, cytocompatible NDI-i-CD-iii FONPs were explored for long-term bioimaging of mammalian cells
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Das, Prasanta Kumar
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 35(2019), 32 vom: 13. Aug., Seite 10582-10595
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
1 |
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|g volume:35
|g year:2019
|g number:32
|g day:13
|g month:08
|g pages:10582-10595
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|u http://dx.doi.org/10.1021/acs.langmuir.9b01631
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