A piperazine- modified Schiff base sensor for highly selective detection of Zr (IV) ions: unveiling its antioxidant potential and regulatory effects on Zea mays growth
Gurjaspreet Singh, Sumesh Khurana, Pawan, MOHIT Mohit, Anita Devi, Akshpreet Singh, Vikas Vikas, Daizy R. Batish, Aditi Sharma
Abstract
Piperazine functionalized Schiff bases 4(a-c) were synthesized by a condensation reaction which were thoroughly characterized by using various spectroscopic techniques like 1 H NMR , 13 C NMR, IR and mass spectrometry . X-ray crystallography was used to analyse synthesized compound 4b . The sensing capability of 4b was investigated towards the tetravalent form of the zirconium ion among other metal ions . The limit of detection and the association constant, were calculated to be 56.4 × 10 −8 M and 5.36 × 10 5 M −1 respectively. The inclusion of additional metal ions had no effect on the selectivity of sensor 4b . The binding mechanism was clarified using 1 HNMR spectroscopy, which was further verified computationally, using DFT. Also, the seed germination experiments were performed and effect of compound 4b was analyzed on the seedlings of Zea Mays . An investigation into molecular docking study using (5HQX) protein revealed that it had inhibitory effects on cytokinin oxidase . The protein and ligand effectively associate, as indicated by the lower binding energy of −9.69 kcal/mol. Therefore, compound 4b can act as a good, powerful inhibitor against cytokinin oxidase .