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Synthesis and Spectrophotometric Studies of 2-(1,3,4-Triazolylazo)-5-Diethylamino Phenol and 2-(5-Carboxy-1,3,4-Triazolylazo)-5-Diethylamino Phenol

Synthesis and Spectrophotometric Studies of 2-(1, 3, 4 -Triazolylazo) -5-Diethylamino Phenol and 2-(5-Carboxy-1, 3, 4-Triazolylazo) -5- Diethylamino Phenol
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摘要 In this paper, 2-(1, 3, 4-triazolylazo)-5-diethylamino phenol (TZAPN) and 2-(5-carboxy-1, 3, 4-triazolylazo)-5-diethylamino phenol (CTZAPN) were prepared, the protonation behaviour and the condition of spectrophotometric determination of cobalt with the reagents are reported. The results show that the new colour reagents react with cobalt to form a stable purple red complex (1:3). However, the complex formed could be changed into another species of stable absorptivity by addition of mineral acid (1+1). The method is highly selective and sensitive and has been applied to the direct determination of cobalt in some alloys with satisfactory results. In this paper, 2-(1, 3, 4-triazolylazo)-5-diethylamino phenol (TZAPN) and 2-(5-carboxy-1, 3, 4-triazolylazo)-5-diethylamino phenol (CTZAPN) were prepared, the protonation behaviour and the condition of spectrophotometric determination of cobalt with the reagents are reported. The results show that the new colour reagents react with cobalt to form a stable purple red complex (1:3). However, the complex formed could be changed into another species of stable absorptivity by addition of mineral acid (1+1). The method is highly selective and sensitive and has been applied to the direct determination of cobalt in some alloys with satisfactory results.
出处 《Chinese Chemical Letters》 SCIE CAS CSCD 1999年第4期277-280,共4页 中国化学快报(英文版)
关键词 SYNTHESIS triazolylazo reagent SPECTROPHOTOMETRY COBALT synthesis triazolylazo reagent spectrophotometry cobalt
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