Synthesis, crystal structure and action on Escherichia coli by microcalorimetry of copper complexes with 1,10-phenanthroline and amino acid.
Copper complexes: [Cu(phen)(L-Ser)(H(2)O)Cl] (1), [Cu(phen)(Gly)(H(2)O)]Cl·3H(2)O (2), [Cu(phen)(L-Ala)(H(2)O)]Cl·H(2)O (3), [Cu(phen)(L-Phe)(H(2)O)]Cl·2.5H(2)O (4), Cu(phen)(2)Cl(2)·6H(2)O (5) (phen=1,10-phenanthroline) were synthesized and characterized. The structure of 1 was characterized by X-ray crystallography and showed in a triclinic system with space group P1, a=6.8953(15) Å, b=10.737(2) Å, c=11.894(3) Å, α=110.395(3)°, β=94.183(4)° and γ=100.540(3)°. The antibacterial activities on Escherichia coli (E. coli) of these five copper complexes and CuCl(2) (6) were investigated by microcalorimetry. By analyzing the obtained metabolic thermogenic data and curves, crucial parameters such as rate constant of bacterial growth (k), half inhibitory concentration (IC(50)), and generation time (t(G)) were determined. All these copper complexes could stimulate the growth of the E. coli at their lower concentration. At their higher concentration they all showed antibacterial action. The inhibition on E. coli was 5>1 ≈ 2 ≈ 3 ≈ 4 > 6. And the antibacterial mechanism was discussed preliminarily.
School of Science, Wuhan University of Technology, Wuhan 430070, PR China. lixi682004@yahoo.com.cn
Xi
X
Li
Zhijun
Z
Zhang
Chenggang
C
Wang
Tian
T
Zhang
Kang
K
He
Fanghao
F
Deng
D000596:Amino Acids / Q000737:chemistry*; D000900:Anti-Bacterial Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D002151:Calorimetry; D003300:Copper / Q000737:chemistry*; D004926:Escherichia coli / Q000187:drug effects*; D015394:Molecular Structure; D050607:Organogold Compounds / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D010618:Phenanthrolines / Q000737:chemistry*
D000596:Amino Acids; D000900:Anti-Bacterial Agents; D050607:Organogold Compounds; D010618:Phenanthrolines; D003300:Copper; C025205:1,10-phenanthroline