[Study on the DL-homocysteic acid interacting with metal ions].
The complexes of DL-homocysteic acid (DLH) with Na+, Cu2+, Zn2+ and Ni2+ were synthesized and elemental analyses were used to detect the compositions of these complexes. FTIR spectroscopy was employed to study these coordination structures. The results indicated that all the amino, carboxyl and sulfonate groups of DLH may have direct or indirect interactions with Na+, Cu2+, Zn2+ and Ni2+. The bond strength between metal ions and oxygen of the carboxyl as well as that between metal ions and the amino group are in the order of Cu2+ > Zn2+ > Ni2+, where carboxyl with different ions may take different coordination modes in these complexes, as indicated from the difference between its asymmetric and symmetric stretching vibration.
Jia
Hui-Zhen
HZ
State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
Liu
Yu-Feng
YF
Li
Wei-Hong
WH
Wu
Jin-Guang
JG
D003300:Copper / Q000737:chemistry; D006710:Homocysteine / Q000031:analogs & derivatives* / Q000737:chemistry; D008670:Metals / Q000737:chemistry*; D009532:Nickel / Q000737:chemistry; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry; D012964:Sodium / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods; D015032:Zinc / Q000737:chemistry
D008670:Metals; D009942:Organometallic Compounds; D006710:Homocysteine; C007956:homocysteic acid; D003300:Copper; D009532:Nickel; D012964:Sodium; D015032:Zinc