Nonprotected Fluid Room Temperature Phosphorescence of Bromonaphthalene and Its Medium Effects

Chem. J. Chinese Universities ›› 1999, Vol. 20 ›› Issue (2): 214.

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Nonprotected Fluid Room Temperature Phosphorescence of Bromonaphthalene and Its Medium Effects

MOU Lan¹, CHEN Xiao-Kang², LI Long-Di³

1. Department of Chemistry, Guizhou Universitya, Guiyang, 550025;
2. Department of Chemistry, Shaoguan Universityb, Shaoguan 512005;
3. Department of Chemistry, Tsinghua Universityc, Beijing, 100084

Received:1998-06-10 Online:1999-02-24 Published:1999-02-24

Abstract

Abstract: Astrong and stable room temperature phosphorescence(RTP) signal of bromonaphthalene(β-BrN) aqueous solution with peak wavelengths of λ_ex/λ_em=275.0 nm/(494/3, 517/6) nm can be induced only by using Na₂SO₃as an oxygen scavenger and irradiating the solution for some time with the light source of apparatus. The RTP intensity and irradiation time required to acquire a stable RTP signal are very sensitive to the kind and amount of organic solvent added to the system. For a β-BrN/Na₂SO₃aqueous solution system containing 25% acetonitrile, a short irradiation time is needed and a strong and stable RTP signaLIs triggered quickly. The RTP intensity is linear to the BrN concentration in the range 8.0×10^-8-1.6×10^-5mol/Lwith the detection limit of 4.7×10^-8mol/L.

Key words: Bromonaphthalene, Nonprotected fluid room temperature phosphorescence, Medium effects

CLC Number:

O657.3

TrendMD:

MOU Lan, CHEN Xiao-Kang, LI Long-Di. Nonprotected Fluid Room Temperature Phosphorescence of Bromonaphthalene and Its Medium Effects[J]. Chem. J. Chinese Universities, 1999, 20(2): 214.

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Nonprotected Fluid Room Temperature Phosphorescence of Bromonaphthalene and Its Medium Effects

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