title: Studies on the spectroscopic behavior of cryptotanshinone, tanshinone IIA, and tanshinone I.
abstract: A comparative study on the spectroscopic behavior of cryptotanshinone (CTan), tanshinone IIA (Tan IIA), and tanshinone I (Tan I) has been investigated, including UV-Vis absorption, low temperature phosphorescence (LTP), low temperature fluorescence (LTF), paper substrate-room temperature phosphorescence (PS-RTP), paper substrate-room temperature fluorescence (PS-RTF) and fluorescence in liquid (LF). The effect of pH on the luminescence intensity is discussed. Lifetime and polarization of the LTP and RTP have been examined with phosphorescence lifetime in the range of 0.6-0.9s and polarization in the range of 0.10-0.27. Analytical characteristics of LF, PS-RTF and PS-RTP of CTan, Tan IIA, and Tan I have been studied.
authors.affiliation: Institute of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, PR China.
authors.forename: Jun-Fen
authors.initials: JF
authors.lastname: Li
authors.forename: Yu-Xia
authors.initials: YX
authors.lastname: Wei
authors.forename: Zhi-Cheng
authors.initials: ZC
authors.lastname: Xu
authors.forename: Chuan
authors.initials: C
authors.lastname: Dong
authors.forename: Shao-Min
authors.initials: SM
authors.lastname: Shuang
mesh_terms: D045784:Abietanes; D006863:Hydrogen-Ion Concentration; D008956:Models, Chemical; D010616:Phenanthrenes / Q000032:analysis*; D013050:Spectrometry, Fluorescence / Q000379:methods*; D013053:Spectrophotometry / Q000379:methods*; D013696:Temperature; D013997:Time Factors; D014466:Ultraviolet Rays
chemical_list: D045784:Abietanes; D010616:Phenanthrenes; C021751:tanshinone; C037886:cryptotanshinone