Studies on Non-protected Fluid Room Temperature Phosphorescence of Polycyclic Aromatic Hydrocarbon of Fluoren and Acenaphthene

Abstract

Abstract: Astrong and stable room temperature phosphorescence(RTP) signal of fluoren(Flu), acenaphthene(Ace) aqueous solution can be induced only by using Na 2SO₃ as oxygen scavenger and KIas heavy atom perturber. The maximum phosphorescence intensity wavelengths are λ_ex/λ_em=285/467, 286/493, 520 nm. The RTPintensity is very sensitive to the kind and amount of organic solvent added to the system. For a Flu(or Ace)/KI/Na 2SO₃ aqueous solution system containing 1.0% acetonitrile, the RTPintensity is linear to Flu(or Ace) concentration in the range of 8.0×10^-7 8.0×10^-6 mol/Land 8.0×10^-6 4.0×10^-5 mol/Lor 8.0×10^-7 2.8×10^-6 mol/Land 2.8×10^-6 4.0×10^-5 mol/L. The calculated detection limit by methodology of IUPACbased on three times the standard deviation of background is 8.6×10^-8 , 9.0×10^-8 mol/Lrespectively. The relative standard deviation( n =7) is 2.4% or 3.5% for the system containing 1.2×10^-5 mol/Lof Flu or Ace. The present work shows again that a protective medium is not necessary condition for the fluid RTPemission.

Key words: Non-protected fluid room temperature phosphorescence, Fluoren, Acenaphthene, Effects of organic solvents

CLC Number:

O657.3

TrendMD:

LI Long-Di, MOU Lan, CHEN Xiao-Kang . Studies on Non-protected Fluid Room Temperature Phosphorescence of Polycyclic Aromatic Hydrocarbon of Fluoren and Acenaphthene[J]. Chem. J. Chinese Universities, 2000, 21(7): 1040.

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Studies on Non-protected Fluid Room Temperature Phosphorescence of Polycyclic Aromatic Hydrocarbon of Fluoren and Acenaphthene

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