title: Comment on the article "Investigation of Fluorescence Resonance Energy Transfer between Fluorescein and Rhodamine 6G".
abstract: In this comment we, report the missing of relevant literature regarding Forster energy transfer (FRET) between fluorescein and rhodamine 6G in a recent paper (Spectrochim. Acta A, 149 (2015) 143-149). In this paper, the authors claim that "a new FRET pair" has been identified, which is absolutely incorrect. In fact, studies on FRET in this dye pair under different conditions have been done earlier. Further, the estimated critical transfer distance may have uncertainty because of donor quantum yield which is not clarified in the paper.
authors.affiliation: Photophysics Laboratory, Department of Physics, DSB Campus, Kumaun University, Nainital 263002, Uttarakhand, India.
authors.forename: Neeraj Kumar
authors.initials: NK
authors.lastname: Joshi
authors.affiliation: Photophysics Laboratory, Department of Physics, DSB Campus, Kumaun University, Nainital 263002, Uttarakhand, India. Electronic address: sanjaypent@yahoo.com.
authors.forename: Sanjay
authors.initials: S
authors.lastname: Pant
authors.affiliation: Institute for Plasma Research, Laser Diagnostics Division, Bhat, Near Indira Bridge, Gandhinagar 382428, Gujarat, India. Electronic address: hem_sup@yahoo.co.uk.
authors.forename: Hem Chandra
authors.initials: HC
authors.lastname: Joshi
keywords: Dye pair; FRET; Quantum yield