摘要
在室温水溶液体系中采用紫外-可见分光光度法和氧电极法对比研究了α-氨基酸(N/O型)、α-氨基醇(N/O型)、羟基多元羧酸(O/O型)和多胺(N/N型)这4类不同双/多齿配体的Co(Ⅱ)配合物的氧合性能及其氧合反应的可逆性.结果表明,O/O型含羟基的羧酸Co(Ⅱ)配合物无氧合性能;N/N型多胺Co(Ⅱ)配合物有强吸氧性,但氧合反应不可逆;N/O型配体的Co(Ⅱ)配合物的氧合性能差异较大,其中α-氨基酸Co(Ⅱ)配合物具有明显的可逆氧合性能,而含1个—OH的α-氨基醇Co(Ⅱ)配合物没有吸氧能力,含有2个—OH的α-氨基醇Co(Ⅱ)配合物有微弱的吸氧能力但氧合反应不可逆.分析探讨了N/O型配体中—OH和—COOH对Co(Ⅱ)配合物可逆吸氧性能影响的机理,根据实验结果初步认为α-氨基酸配位结构是Co(Ⅱ)配合物具有可逆吸氧性能的基本配位结构单元.
In this paper, the influences of the reversible oxygenation performances of Co（ Ⅱ ） complexes with different ligands have been investigated in aqueous solution at room temperature. Four types of bi-/polydentate ligands, such as a-amino acids（ N/O type） , a-amino alcohols（ N/O type） , polyamine（ N/N type） and multi- carboxylic acids（ 0/0 type） , have been selected to conduct a comparative research, and the oxygenation per- formances have been determined via UV-Vis spectrophotometry and oxygen electrode. The results showed that the cobalt（ Ⅱ ） complexes of 0/0 type polydentate ligands had no oxygenation properties; the complexes of N/N type bidentate ligands were proved to have strong capability to uptake oxygen, while the oxygenation process was irreversible. Great differences of oxygenation performance between a-amino acids Co （ Ⅱ ） comple- xes and a-amino alcohols Co （ Ⅱ ） complexes have been found： a-amino acids Co （ Ⅱ ） complexes exhibited reversible oxygenation performance, however, the Co （ ） complexes of a-amino alcohols with one hydroxy group displayed no oxygenation, but the complexes of a-amino alcohols with two hydroxy groups could absorb oxygen weakly while the process was irreversible. Meanwhile the mechanism of reversible oxygenation perform- ance of Co（ Ⅱ ） complexes that containing --OH and --COOH groups in N/O type bidentate ligand were ana- lyzed and studied. It can be estimated that the group of a-amino acid is the basic coordination structure unit of the Co（ Ⅱ ） complexes which have the reversible oxygenation performance.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2013年第10期2262-2269,共8页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:21261022
21162027和20961010)资助
关键词
双/多齿配体
钴配合物
吸氧性能
Α-氨基酸
氧载体
Bi-/poly-dentate ligand
Cobalt （ 11 ） complex
Oxygenation performance
a-Amino acid
Oxy-gen carrier
