Synthesis and characterization of arsenate antimonic acid AAAc(1 : 1)  

作　　者：WANG Xue-wen CHEN Qi-yuan YIN Zhou-lan ZHANG Ping-min WANG Yu-wen 

机构地区：[1]School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China Chemistry Department, Jinggangshan Normal College, Ji''an 343009, China

出　　处：《Journal of Central South University of Technology》2005年第z1期76-81,共6页中南工业大学学报（英文版）

基　　金：Project(50274075) supported by the National Natural Science Foundation of China

摘　　要：The AAAc(1 : 1) was synthesized in water by As2O3 and Sb2O3 with molar ratio of 1 : 1: AAAc(1 : 1)was characterized by Raman, IR, TG/DTG, DSC, XPS and XRD. The results show that there are four peaks to vsof As-OH, As-O-Sb, Sb-OH and Sb-O-Sb in Raman spectra of AAAc(1 : 1) at 100 - 1 000 cm-1. The solution of AAAc(1 : 1) was also titrated with KOH solution. The titration results show that AAAc(1 : 1) is a hexabasic acid with dissociation constants of k1 = 3.62 × 10-2 , k2 = 3.05 × 10-3 , k3 = 6. 43 × 10-6 , k4 = 9. 78 × 10-8 ,k5 = 1.32 × 10-11 , k6 =3.87 × 10-12. AAAc(1 : 1) has a good solubility and stability in water, its solid obtained by free volatilizing water from its solution under air at ambient temperature is amorphous. Chemical and thermal analyture of AsO ( OH )2-OH-Sb ( OH )4-O-Sb ( OH )4-OH-AsO ( OH )2 or As ( OH )3-O-Sb(OH)4-O-Sb(OH)4-O-As(OH)3 (isomerism) through experimental determination and geometry optimization.

关 键 词：ARSENIC ACID antimonic ACID ARSENATE antimonic ACID 

分 类 号：O612.5[理学—无机化学]