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Polyol-mediated synthesis of nitrogen-containing carbon-dots from tetracyanobenzene with intense red fluorescence

Lehmacher, R.; Feldmann, C.

Abstract (englisch):
Nitrogen-containing C-dots were prepared by heating (160 °C, 1 h) 1,2,4,5-tetracyanobenzene (TCB) in polyethylene glycol 400 (PEG400). The as-prepared monocrystalline C-dots were 2–4 nm in diameter and contained 24.4 wt. % of nitrogen. They showed intense fluorescence under excitation at 400–500 nm as well as under excitation at 600–700 nm. In addition to an excitation-wavelength-depending emission at 400 to 650 nm, the emission spectra exhibited a strong emission peaking at 715 nm, whose position was independent from the wavelength of excitation. For this deep-red emission a remarkable quantum yield of 69% was detected. The synthesis of nitrogen-containing C-dotswas completely performed in the liquid phase. Moreover, the C-dots could be directly dispersed in water. The resulting aqueous suspensions of PEG400-stabilized nitrogen-containing C-dots also showed intense red emission that was visible to the naked eye.

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Verlagsausgabe §
DOI: 10.5445/IR/1000099767
Veröffentlicht am 13.11.2019
Originalveröffentlichung
DOI: 10.3390/nano9101470
Scopus
Zitationen: 2
Web of Science
Zitationen: 2
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Anorganische Chemie (AOC)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2019
Sprache Englisch
Identifikator ISSN: 2079-4991
KITopen-ID: 1000099767
Erschienen in Nanomaterials
Verlag MDPI
Band 9
Heft 10
Seiten Article No.1470
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 16.10.2019
Schlagwörter carbon dot; 1,2,4,5-tetracyanobenzene; polyol synthesis; nitrogen containing; red emission
Nachgewiesen in Scopus
Web of Science
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