Abstract：
Wet synthesis approach afforded four new heteroleptic mononuclear neutral diamagnetic oxidovanadium(V) complexes, comprising salicylaldehyde-based 2-furoic acid hydrazones and a flavonol coligand of the general composition [VO(fla)(L-ONO)]. The complexes were comprehensively characterized, including chemical analysis, conductometry, infrared, electronic, and mass spectroscopy, as well as 1D 1H and proton-decoupled 13C(1H) NMR spectroscopy, alongside extensive 2D 1H1H COSY, 1H13C HMQC, and 1H13C HMBC NMR analyses. Additionally, the quantum chemical properties of the complexes were studied using Gaussian at the B3LYP, HF, and M062X levels on the 6-31++g(d,p) basis sets. The interaction of these hydrolytically inert vanadium complexes and the BSA was investigated through spectrofluorimetric titration, synchronous fluorimetry, and FRET analysis in a temperature-dependent manner, providing valuable thermodynamic insights into van der Waals interactions and hydrogen bonding. Molecular docking was conducted to gain further understanding of the specific binding sites of the complexes to BSA. Complex 2, featuring a 5-chloro-substituted salicylaldehyde component of the hydrazone, was extensively examined for its biological activity in vivo. The effects of complex administration on biochemical and hematological parameters were evaluated in both healthy and diabetic Wistar rats, revealing antihyperglycemic activity at millimolar concentration. Furthermore, histopathological analysis and bioaccumulation studies of the complex in the brain, kidneys, and livers of healthy and diabetic rats revealed the potential for further development of vanadium(V) hydrazone complexes as antidiabetic and insulin-mimetic agents.
摘要：
湿法合成方法提供了四个新的杂配单核中性抗磁性氧化钒（V）配合物，其包含基于水杨醛的2-糠酸腙和一般组成的黄酮醇键配体[VO(fla)(L-ONO)]。对复合物进行了全面的表征，包括化学分析,电导法,红外线,电子,和质谱，以及1D1H和质子解耦13C（1H）NMR光谱，除了广泛的2D1H1HCOSY，1H13CHMQC,和1H13CHMBCNMR分析。此外,在B3LYP上使用高斯研究了配合物的量子化学性质，HF,和6-31++g上的M062X水平(d，P)基础集。通过荧光光谱法滴定研究了这些水解惰性钒配合物与BSA的相互作用，同步荧光法,与温度相关的FRET分析，为范德华相互作用和氢键提供有价值的热力学见解。进行分子对接以进一步了解复合物与BSA的特异性结合位点。配合物2，具有腙的5-氯取代的水杨醛组分，广泛检查了其体内生物活性。在健康和糖尿病Wistar大鼠中评估了复合给药对生化和血液学参数的影响，在毫摩尔浓度下显示抗高血糖活性。此外，大脑中复合物的组织病理学分析和生物积累研究，肾脏，健康和糖尿病大鼠的肝脏揭示了进一步开发钒（V）腙配合物作为抗糖尿病和胰岛素模拟剂的潜力。
