Spectroscopic Investigation on the Charge—Transfer Complex of 2,4,6—Trinitrophenol with the Polycyclicamine 1,4,8,11-Tetraazacyclotetradecane

Abstract

The reaction between 2,4,6-trinitrophenol(TNP) and the polycyclicamine 1,4,8,11-tetraazacyclotetradecane (TACTD) in solvents such as chloroform and carbontetrachloride have been studied spectrophotometrically using UV-VIS, and IR methods. The results indicate the formation of a 1:2 charge-transfer complex with formula((TACTD)(TNP)2).The charge-transfer absorption in this complex appears arounds 410 nm.The values of both the equilibrium constant, K, and the molar extinction coefficient,€ , for the reaction in different solvents are calculated for the CT-complex. These values were used to understand the solvent effects on the course of the reaction. All observed infrared bands for the formed solid complex are assigned.

Study of Physicochemical and Explosive Properties of a 2,4,6-Trinitrotoluene/Aniline Cocrystal Solvate

“…A key, distinguishing feature frequently observed in charge-transfer complexes is the existence of a broad, optical absorbance band in the visible region. ,,,,− The diffuse reflectance absorbance spectra for pure TNT and a TNT/aniline cocrystal solvate are shown in Figure . As can be seen for the cocrystal solvate, there is a new absorbance peak that begins at approximately 600 nm and has a maximum absorbance around 495 nm.…”

Interaction of 2,3-dichloro-5,6-dicyano-1,4-benzoquinone with aza-18-crown-6 and aza-12-crown-4. Kinetic and spectrophotometric studies in chloroform and acetonitrile solutions

“…The formation constant and mass balance equations are given by eqns. ( 8)- (10). Substitution of eqns.…”

“…[2][3][4] Recently, there has been an increasing interest in the study of the electron donor-acceptor (EDA) interactions between crown ethers and a variety of acceptor molecules. [5][6][7][8][9][10][11][12][13][14][15][16] Among the different macrocyclic ligands used for EDA complexation, aza-substituted crown ethers show very interesting features. It has been clearly shown that the substitution of the oxygen atoms in a crown ether ring by ᎐NH᎐ groups results in a drastic increase in the stability of their complexes with iodine 9,12-14 and 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) 16 over those of ordinary crowns.…”

Spectroscopic studies of charge-transfer complexation of iodine with a new benzo-substituted macrocyclic diamide in chloroform, dichloromethane and their 1:1 mixture

“…The substitution of some oxygen atoms of the crown ethers by -NH-, and -S-groups has found to alter their complexing ability towards different metal ions [4]. During the past two decades, a growing interest has been focused on the complexing ability of these macrocyclic ligands as electronpair molecules towards neutral and electron accepting molecules [5][6][7][8][9][10][11][12][13][14][15][16] and, especially, molecular iodine [17][18][19][20][21][22][23][24][25][26][27][28]. Interest in such molecular complexes is largely due to their possible applications in areas like organic semiconduction, separation processes, catalysis of chemical reactions, biomimetic receptors and conversion of chemical reactions into electronic or optical signals [5,[29][30][31].…”