PMID- 21331812
OWN - NLM
STAT- MEDLINE
DCOM- 20111229
LR  - 20211020
IS  - 1573-4994 (Electronic)
IS  - 1053-0509 (Linking)
VI  - 21
IP  - 4
DP  - 2011 Jul
TI  - Effects of room temperature ionic liquids on fluorescence characteristics of 
      17beta-estradiol and its derivative.
PG  - 1643-8
LID - 10.1007/s10895-011-0853-z [doi]
AB  - Previous reports have seldom concerned about the RTILs (Room temperature ionic 
      liquids), and their effects on derivatization reaction or derivatives. In this 
      study, we reported that the effects of four different RTILs, i.e., [EMIM]PF(6), 
      [BMIM]PF(6), [HMIM]PF(6) and [OMIM]PF(6), on fluorescence spectra of 17 
      beta-estradiol (E2), and its derivatization solvent dansyl chloride (DNSCl) and the 
      derivative. [BMIM]PF(6) had a significant quenching effect on the fluorescence 
      intensity of E2, suggesting the formation of [BMIM]PF(6)/E2 complexes and 
      possible buried E2 molecular in a more hydrophobic microenvironment. The 
      estimated Stern-Volmer quenching constant (Ksv=0.3519) proved that E2 quenching 
      caused by [BMIM]PF(6) was a dynamic quenching process. Four RTILs, with different 
      alkyl chain-length in imidazolium cation, resulted in different quenching 
      intensities to E2 as follows: [EMIM]PF(6) > [BMIM]PF(6) > [HMIM]PF(6) > 
      [OMIM]PF(6). At 5 mg L(-1) of DNSCl, [BMIM]PF(6), [HMIM]PF(6) and [OMIM]PF(6) 
      increased the fluorescence intensities of E2 in water by 8.5, 7.6 and 6.1 times, 
      respectively, and a 37-nm hypsochromic shift occurred. The fluorescence intensity 
      for [BMIM]PF(6)-extracted derivative of E2 increased more than two times compared 
      with that for the control. In conclusion, this study demonstrated that above four 
      hexafluorophosphate salt ionic liquids could be used in derivatization reaction 
      to enhance fluorescent sensitivity in E2 trace residual analysis.
CI  - (c) Springer Science+Business Media, LLC 2011
FAU - Wang, Xuedong
AU  - Wang X
AD  - Institute of Watershed Science and Environmental Ecology, Wenzhou Medical 
      College, Chashan Campus, Wenzhou, Zhejiang 325035, People's Republic of China.
FAU - Li, Yanyan
AU  - Li Y
FAU - Du, Xiwei
AU  - Du X
FAU - Lin, Zhenkun
AU  - Lin Z
FAU - Huang, Changjiang
AU  - Huang C
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20110218
PL  - Netherlands
TA  - J Fluoresc
JT  - Journal of fluorescence
JID - 9201341
RN  - 0 (Ionic Liquids)
RN  - 4TI98Z838E (Estradiol)
SB  - IM
MH  - Estradiol/*chemistry
MH  - *Fluorescence
MH  - Ionic Liquids/*chemistry
MH  - Molecular Structure
MH  - Spectrometry, Fluorescence
MH  - *Temperature
EDAT- 2011/02/19 06:00
MHDA- 2011/12/30 06:00
CRDT- 2011/02/19 06:00
PHST- 2010/09/25 00:00 [received]
PHST- 2011/02/01 00:00 [accepted]
PHST- 2011/02/19 06:00 [entrez]
PHST- 2011/02/19 06:00 [pubmed]
PHST- 2011/12/30 06:00 [medline]
AID - 10.1007/s10895-011-0853-z [doi]
PST - ppublish
SO  - J Fluoresc. 2011 Jul;21(4):1643-8. doi: 10.1007/s10895-011-0853-z. Epub 2011 Feb 
      18.