Two new Co(II) and Cu(II) complexes from an imidazolium ionic liquid based Schiff base 1-{2-(2-hydroxy-5-nitrobenzylideneamino)ethyl}-3-ethylimidazolium tetrafluoroborate have been synthesized and characterized by different analytical and spectroscopic techniques such as elemental analysis (CHN analysis), UV-Visible, ¹H-NMR, FTIR, Mass-spectra, Powder X-ray diffraction analysis, magnetic susceptibility measurements and molar conductance data. From these analytical results, tetra coordinated 1:2 metal-ligand stoichiometry is suggested for the both complexes. The molar conductance data of the complexes reveal their electrolytic nature (1:2). The synthesized complexes along with the ligand have been screened for in vitro antibacterial applications against gram negative and gram positive bacteria to assess their inhibition potentials. The complexes are proved to be very effective against the tested organisms.

中文翻译：

---

由咪唑离子液体基希夫碱衍生的新型Co（II）和Cu（II）配合物：合成，理化性质表征和抗菌活性的探索

从咪唑离子液体基席夫碱1- {2-（2-羟基-5-硝基苄叉亚氨基）乙基} -3-乙基咪唑四氟硼酸酯合成了两种新的Co（II）和Cu（II）配合物，并通过不同的分析和表征光谱技术，例如元素分析（CHN分析），UV-Visible，¹ H-NMR，FTIR，质谱，粉末X射线衍射分析，磁化率测量和摩尔电导数据。从这些分析结果，建议两种配合物的四配位的1：2金属配体化学计量。配合物的摩尔电导数据揭示了它们的电解性质（1：2）。合成的配合物和配体已在体外筛选革兰氏阴性和革兰氏阳性细菌的抗菌应用，以评估其抑制潜力。事实证明，该配合物对被测生物非常有效。