Melting points were determined in open capillaries on a FALC Instrument SRL360D. TLC (
Silica Gel 60 F254) from Merck (Beijing, China) was used to check the compounds’ purities. Elemental analyses were carried out by using
Euro EA 3000 (EUROVECTOR, Pavia, Italy) instrument. The infrared spectra of the Schiff bases were recorded on FT-IR (Bruker Optics GmbH & Co. Ettlingen, Germany) with an ATR model (ALPHA 200488) in the frequency range of 4000–550 cm
–1. NMR spectra were recorded in DMSO-
d6 and CDCl
3 solvent on a BRUKER AV-500 MHz NMR (Bruker Beijing Scientific Technology, Beijing, China). A high-resolution multinuclear FT-NMR spectrometer was used in the presence of SiMe
4 (internal standard) at δ = 0 ppm at 25 °C.
The sbsorbance of α-amylase and α-glucosidase activities (at 540 and 405 nm, respectively) were measured on a microplate reader (
BioTek Elx-800, Agilent Technologies, Santa Clara, CA, USA). An
InnuPREP Blood DNA Mini Kit (Analytik Jena) (AJ Innuscreen GmbH, Berlin, Germany) was used for the extraction of genomic DNA from human blood. A PDA spectrophotometer (Agilent 8453) Agilent Technologies, Berkshire, UK, along with a quartz optical cell (with an effective absorption path of 1 cm), was used for DNA interaction studies of the synthesized Schiff bases.
Rafique B., Kalsoom S., Sajini A.A., Ismail H, & Iqbal M. (2022). Synthesis, Characterization, Biological Evaluation and DNA Interaction Studies of 4-Aminophenol Derivatives: Theoretical and Experimental Approach. Molecules, 27(4), 1352.