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Synthesis of the New Reagent 1-azobenzene-3-(5-cyano-2-pyridyl)-triazene and Its Color Reaction with Zinc

Chaohui Zhou

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Abstract

The synthesis of a chromogenic reagent 1-azobenzene-3-(5-cyano-2-pyridyl)-triazene(ABCPDT) and its color reaction with zinc was investigaed.In the presence of the surface active agent NP-40,ABCPDT formed a red complex with Zn(Ⅱ) in the Na2B4O7-NaOH medium of pH 10~12.Meanwhile,the mohar ratio of Zn(Ⅱ) to ABCPDT was 3∶1.The apparent molar absorbtivity of the complex was 1.52×105 L·mol-1·cm-1 at 530 nm(λmax).It was well obeyed of Beer's law in the range of 0～0.48 mg/L for zinc.When this method was applied to the direct determination of zinc in human hair,it got a satixfactory result.

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What this paper is about

The synthesis of a chromogenic reagent 1-azobenzene-3-(5-cyano-2-pyridyl)-triazene(ABCPDT) and its color reaction with zinc was investigaed.In the presence of the surface active agent NP-40,ABCPDT formed a red complex with Zn(Ⅱ) in the Na2B4O7-NaOH medium of pH 10~12.Meanwhile,the mohar ratio of Zn(Ⅱ) to ABCPDT was 3∶1.The apparent molar absorbtivity of the complex was 1.52×105 L·mol-1·cm-1 at 530 nm(λmax).It was well obeyed of Beer's law in the range of 0～0.48 mg/L for zinc.When this method was applied to the direct determination of zinc in human hair,it got a satixfactory result.

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Available abstract

The synthesis of a chromogenic reagent 1-azobenzene-3-(5-cyano-2-pyridyl)-triazene(ABCPDT) and its color reaction with zinc was investigaed.In the presence of the surface active agent NP-40,ABCPDT formed a red complex with Zn(Ⅱ) in the Na2B4O7-NaOH medium of pH 10~12.Meanwhile,the mohar ratio of Zn(Ⅱ) to ABCPDT was 3∶1.The apparent molar absorbtivity of the complex was 1.52×105 L·mol-1·cm-1 at 530 nm(λmax).It was well obeyed of Beer's law in the range of 0～0.48 mg/L for zinc.When this method was applied to the direct determination of zinc in human hair,it got a satixfactory result.

Key concepts: Reagent, Triazene, Zinc, Chromogenic, Chemistry, Azobenzene, Color reaction, Nuclear chemistry

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Synthesis of the New Reagent 1-azobenzene-3-(5-cyano-2-pyridyl)-triazene and Its Color Reaction with Zinc — Research Paper | ScholarLens