Structural characterization of molecular complexes formed by trimethoprim and cimitidine with 2,3,5,6-tetrachloro-1,4-benzoquinone

Spectroscopic studies on the formation of molecular complexes of sulfamethoxazole with novel 2,3,5-trichloro-6-alkoxy-1,4-benzoquinones

“…The experimental results indicated that the quenching efficiency increased with increasing concentration of the electron acceptor (Figs. [2][3][4][5] and with increasing time. The fraction of acceptors bound to the donor was determined by using the following equation.…”

“…The ANH proton of the pure SULF occurs at 10.927 ppm and in the product it occurs at 11.339 ppm. The down field shifts of most of the signals are corresponding due to the interaction occurred between the donor and the acceptor [5,33].…”

“…The pseudo-firstorder rate constants (k 1 ) were calculated from the gradients of log À(A 1 -A t ) against time plots, where A 1 and A t represent the absorbance at infinity and time t, respectively. The second order rate constants were calculated by dividing k 1 by [D] [5].…”

“…In recent years considerable attention has been given to study the charge transfer (CT) or electron donor acceptor (EDA) complexes formed between organic donor compounds and r or p acceptors [1][2][3][4][5]. This growing importance is due its interesting optical and electronic properties [6].…”

Supramolecular Arrangement in Styphnic Acid and Naphthalene‐1,4‐diol (1 : 1) through a Novel Synthetic Rote for Styphnic Acid

“…Many of the electron donor-acceptor (EDA) interactions had been widely studied spectrophotometrically in the determination of drugs that are easy to be determined based on CT-complex formation with some electron acceptors [1][2][3].…”