β-溴代萘的无保护流体室温磷光性质及介质效应

Nonprotected Fluid Room Temperature Phosphorescence of Bromonaphthalene and Its Medium Effects

无任何保护性介质存在下，β－溴代萘（β－ＢｒＮ）水溶液仅以Ｎａ２ＳＯ３作化学除氧剂，经仪器光源适当照射，即能很快产生强而稳定的室温磷光（ＲＴＰ）信号．不同种类和用量的有机溶剂存在时，ＲＴＰ强度和获得稳定ＲＴＰ信号所需光诱导的时间显著不同．含２．５％乙腈的β－ＢｒＮ水溶液仅需极短的光诱导时间就能产生很强的ＲＴＰ发射，β－ＢｒＮ浓度在８．０×１０－８～１．６×１０－５ｍｏｌ／Ｌ范围内与其ＲＴＰ强度呈良好线性关系，检出限４．

A strong and stable room temperature phosphorescence(RTP) signal of bromonaphthalene(BrN) aqueous solution with peak wavelengths of ex/em=2750 nm/(4943, 5176) nm can be induced only by using Na2SO3 as 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 BrN/Na2SO3 aqueous solution system containing 25% acetonitrile, a short irradiation time is needed and a strong and stable RTP signal is triggered quickly. The RTP intensity is linear to the BrN concentration in the range 8010-81610-5 mol/L with the detection limit of 4710-8 mol/L.