In order to search into the positive inotropic activities after a triazole ring being added to the quinoline ring,synthesis of two 4,5 dihydrotriazoloquinoline derivatives were desgned and synthesized.All of them were...In order to search into the positive inotropic activities after a triazole ring being added to the quinoline ring,synthesis of two 4,5 dihydrotriazoloquinoline derivatives were desgned and synthesized.All of them were new compounds whose structures were confirmed by MS?IR and 1H NMR.展开更多
A new chromogenic reagent, 1 -(5 - nitro- 3 - benzopsendothiazde)- 3 -(4 - phenylazophenyl) - triazene (NBPTPAPT) has been synthesized and used as a sensitive reagent for the spectrophotometric determination of ...A new chromogenic reagent, 1 -(5 - nitro- 3 - benzopsendothiazde)- 3 -(4 - phenylazophenyl) - triazene (NBPTPAPT) has been synthesized and used as a sensitive reagent for the spectrophotometric determination of cobalt. In the presence of Tween - 80, the reagent with Co ( Ⅱ ) forms a yellow complex (1 : 2) in the buffer solution of Na2B4O7 - NaOH at pH 10.54. The apparent molar absorptivity is 1.220× 10^5 L· mol^- 1· cm^- 1 with the linear range of 0 - 240μg/ L for Co (Ⅱ) by dual-wavelength spectrophotometry. Trace cobalt in vitamin B12 and tea samples has been determined with satisfactory results.展开更多
文摘In order to search into the positive inotropic activities after a triazole ring being added to the quinoline ring,synthesis of two 4,5 dihydrotriazoloquinoline derivatives were desgned and synthesized.All of them were new compounds whose structures were confirmed by MS?IR and 1H NMR.
基金Natural Science Foundation of Fujian Province (No.D0410027)
文摘A new chromogenic reagent, 1 -(5 - nitro- 3 - benzopsendothiazde)- 3 -(4 - phenylazophenyl) - triazene (NBPTPAPT) has been synthesized and used as a sensitive reagent for the spectrophotometric determination of cobalt. In the presence of Tween - 80, the reagent with Co ( Ⅱ ) forms a yellow complex (1 : 2) in the buffer solution of Na2B4O7 - NaOH at pH 10.54. The apparent molar absorptivity is 1.220× 10^5 L· mol^- 1· cm^- 1 with the linear range of 0 - 240μg/ L for Co (Ⅱ) by dual-wavelength spectrophotometry. Trace cobalt in vitamin B12 and tea samples has been determined with satisfactory results.