Studies on a New Effect of Fluorescent Sensitization Based on the Formation of Heteropolynuclear Complex(Ⅱ) ──Fluorescences of the Co(Ⅱ)-7-(8-Hydroxy-3, 6-disulfonaphthylazo)-8-hydroxyquinoline-5-sulfonic acid-B(Ⅲ)System and Their Analytical Applicat

Chem. J. Chinese Universities ›› 1994, Vol. 15 ›› Issue (3): 367.

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Studies on a New Effect of Fluorescent Sensitization Based on the Formation of Heteropolynuclear Complex(Ⅱ) ──Fluorescences of the Co(Ⅱ)-7-(8-Hydroxy-3, 6-disulfonaphthylazo)-8-hydroxyquinoline-5-sulfonic acid-B(Ⅲ)System and Their Analytical Applicat

XIONG Guo-Hua¹, LIU Hong², YU Ying², HUANG Jian-Feng²

1. Department of Chemistry, Jiujiang Teachers' College, Jiujiang, 332000;
2. Experiment Centre, Jiangxi University, Nanchang

Received:1993-03-19 Revised:1993-08-15 Online:1994-03-24 Published:1994-03-24

Abstract

Abstract: A new effect of fluorescent sensitization is studied.Co²⁺ can promote the complexation reaction between 7-(8-hydroxy-3,6-disulfonaphthylazo)-8-hydroxyquinoline-5-sulfonic acid(R) and boron(Ⅲ)(provided by B₂O₄^2-), and makes the fluorescent intensity increase but does not change the characteristic fluorescent spectrum.Our study show that it is the formation of heteropolynuclear complex CoR₂B that makes the fluorescent sensitization.So, a fluoremetric analytical approach of cobalt has been established.It's linear range is 0-5.1×10^-7mol/L Co²⁺, and the detection limit is 7.2×10^-9mol/L.

Key words: Heteropolynuclear complex, Fluorescent sensitization, 7-(8-Hydroxy-3,6-disulfonaphthylazo)-8-hydroxyquinoline-5-sulfonic acid, Boron, Cobalt

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XIONG Guo-Hua, LIU Hong, YU Ying, HUANG Jian-Feng. Studies on a New Effect of Fluorescent Sensitization Based on the Formation of Heteropolynuclear Complex(Ⅱ) ──Fluorescences of the Co(Ⅱ)-7-(8-Hydroxy-3, 6-disulfonaphthylazo)-8-hydroxyquinoline-5-sulfonic acid-B(Ⅲ)System and Their Analytical Applicat[J]. Chem. J. Chinese Universities, 1994, 15(3): 367.

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Studies on a New Effect of Fluorescent Sensitization Based on the Formation of Heteropolynuclear Complex(Ⅱ) ──Fluorescences of the Co(Ⅱ)-7-(8-Hydroxy-3, 6-disulfonaphthylazo)-8-hydroxyquinoline-5-sulfonic acid-B(Ⅲ)System and Their Analytical Applicat

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