Photoactivated Fluorescence Enhancement in F, N‐Doped Carbon Dots with Piezochromic Behavior. (6th December 2019)

• Record Type: Journal Article
• Authors: Jiang, Lei; Ding, Haizhen; Lu, Siyu; Geng, Ting; Xiao, Guanjun; Zou, Bo; Bi, Hong
• Is Part Of: Angewandte Chemie. Volume 132:Number 25(2020)
• Page Start: 10072
• Page End: 10077
• Publication Date: 2019-12-06
• Subjects: Aggregationsinduzierte Emission -- Hohe Drücke -- Kohlenstoff-Quantenpunkte -- Photoaktivierung -- Piezochrome Fluoreszenz; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201913800
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: Photoactivation in CdSe/ZnS quantum dots (QDs) on UV/Vis light exposure improves photoluminescence (PL) and photostability. However, it was not observed in fluorescent carbon quantum dots (CDs). Now, photoactivated fluorescence enhancement in fluorine and nitrogen co‐doped carbon dots (F, N‐doped CDs) is presented. At 1.0 atm, the fluorescence intensity of F, N‐doped CDs increases with UV light irradiation (5 s–30 min), accompanied with a blue‐shift of the fluorescence emission from 586 nm to 550 nm. F, N‐doped CDs exhibit photoactivated fluorescence enhancement when exposed to UV under high pressure (0.1 GPa). F, N‐doped CDs show reversible piezochromic behavior while applying increasing pressure (1.0 atm to 9.98 GPa), showing a pressure‐triggered aggregation‐induced emission in the range 1.0 atm–0.65 GPa. The photoactivated CDs with piezochromic fluorescence enhancement broadens the versatility of CDs from ambient to high‐pressure conditions and enhances their anti‐photobleaching. Abstract : Kann unter Druck gut arbeiten : Photoaktivierte Fluoreszenzverstärkung in mit F und N codotierten Kohlenstoff‐Quantenpunkten wird vorgestellt. Die Systeme zeigen bei UV‐Bestrahlung Fluoreszenzverstärkung sowie piezochromes Verhalten bei Erhöhung des Drucks (1.0 atm zu 9.98 GPa), wobei im Bereich von 1.0 atm–0.65 GPa Druck‐ausgelöste aggregationsinduzierte Emission vorhanden ist.