Citation: Fu You PAN, Hua Ding LIANG, Chang Hua GE. Synthesis and Spectrophotometric Studies of 2-(1,3,4-Triazolylazo)-5-Diethylamino Phenol and 2-(5-Carboxy-1,3,4-Triazolylazo)-5-Diethylamino Phenol[J]. Chinese Chemical Letters, ;1999, 10(4): 277-280. shu

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

Department of Chemistry, Taizhou Teachers College, 317000 Zhejiang

Received Date: 22 September 1998

In this paper, 2-(l, 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.
- Synthesis,
- triazolyazo reagent,
- spectrophotometry,
- cobalt
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