Complexation of Calcium by alpha-Isosaccharinic Acid under Alkaline Conditions.
摘要:
The complexation of Ca2+ by alpha-isosaccharinic acid (alpha-ISA) was determined by measuring the solubility of Ca(alpha-ISA), as a function of pH. In the pH range between 12 and 12.8, the observed increase of the total concentration of Ca in solution with increasing pH is explained by the complexation reaction:Ca2+ + alpha-ISA(-) = Ca(alpha-ISA(-H))(0) + H+with log K-CaISAo(o)=-10.4 (s=0.2) at I=0. In addition to this complexation reaction, another complex is postulated:Ca2+ + alpha-ISA(-) reversible arrow Ca(alpha-ISA)(+)with log K-CaISA+(o)=1.70. A value for the solubility product of Ca(B-ISA), is calculated: log K-sol(o)=-6.36 (s=0.1) at I=0.
Oxidation of α-D-glucoisosaccharinic acid by nitric acid
作者:Raimo Alén
DOI:10.1016/0008-6215(87)84015-6
日期:1987.3
Complexation of Calcium by alpha-Isosaccharinic Acid under Alkaline Conditions.
作者:Karlien Vercammen、Martin Alfred Glaus、Luc Robert Van Loon、Saktiprosad Ghosh、Pher G. Andersson、Jørgen Møller、Alexander Senning、Xin-Kan Yao、Hong-Gen Wang、J. -P. Tuchagues、Mattias Ögren
DOI:10.3891/acta.chem.scand.53-0241
日期:——
The complexation of Ca2+ by alpha-isosaccharinic acid (alpha-ISA) was determined by measuring the solubility of Ca(alpha-ISA), as a function of pH. In the pH range between 12 and 12.8, the observed increase of the total concentration of Ca in solution with increasing pH is explained by the complexation reaction:Ca2+ + alpha-ISA(-) = Ca(alpha-ISA(-H))(0) + H+with log K-CaISAo(o)=-10.4 (s=0.2) at I=0. In addition to this complexation reaction, another complex is postulated:Ca2+ + alpha-ISA(-) reversible arrow Ca(alpha-ISA)(+)with log K-CaISA+(o)=1.70. A value for the solubility product of Ca(B-ISA), is calculated: log K-sol(o)=-6.36 (s=0.1) at I=0.
Thermodynamic Study of Am(III)–Isosaccharinate Complexation at Various Temperatures Implicating a Stepwise Reduction in Binding Denticity
作者:Hee-Kyung Kim、Hyejin Cho、Keunhong Jeong、Ung Hwi Yoon、Hye-Ryun Cho
DOI:10.1021/acs.inorgchem.2c03180
日期:2022.12.5
Isosaccharinicacid, a major final product of cellulosedegradation under highly alkaline cement porewater conditions, is known to increase the mobility of actinides via strong complex formation. In this study, the formation of Am(III) complexes with α-d-isosaccharinate (ISA) was studied in terms of thermodynamics and coordination structures by combining spectrophotometry, time-resolved laser fluorescence