Inflection point of the fluorescence excitation spectra induced by secondary inner filter effect. Issue 7 (9th August 2018)

• Record Type: Journal Article
• Authors: Ma, Chaoqun; Li, Lei; Gu, Jiao; Zhu, Chun; Chen, Guoqing
• Is Part Of: Spectroscopy letters. Volume 51:Issue 7(2018)
• Page Start: 319
• Page End: 323
• Publication Date: 2018-08-09
• Subjects: fluorescence excitation spectrum -- inflection point -- rhodamine 6G -- secondary inner filter effect; Spectrum analysis -- Periodicals; 543.5
• DOI: 10.1080/00387010.2018.1461655
• Languages: English
• ISSNs: 0038-7010

Abstract

Abstract: The secondary inner filter effect on the fluorescence excitation spectra of rhodamine 6G aqueous solutions with concentration was demonstrated in this paper. The peak of fluorescence excitation spectrum stays at 525 nm at low concentrations, while it breaks up and turns into valley at high concentrations. The threshold concentration was determined to be 3.16 mg/L by the second derivative spectroscopy. A mathematical model was proposed to explain the inflection point of fluorescence excitation spectrum caused by the secondary inner filter effect. On the basis of it, the threshold concentration was calculated to be 2.86 mg/L, approaching to the experimental result.