Solubility of 3,4-Bis(3-nitrofurazan-4-yl)furoxan in Common Solvents at Temperatures between 293.15 K and 313.15 K

Abstract

The solubility of 3,4-bis(3-nitrofurazan-4-yl)furoxan (DNTF) was measured in water, dichloromethane, ethanol, ethyl ethanoate, methanol, and trichloromethane between 293.15 K and 313.15 K. Measurements were performed by using high-pressure liquid chromatography with ultraviolet detection. For all reagents tested, the solubility of DNTF increased as temperature increased. The solubility data were correlated with temperature as an exponential function. The enthalpy of solution in each solvent was calculated by an analysis of temperature dependence.

Measurement and correlation of the solubility of 3,4-bis(3-nitrofurazan-4-yl)furoxan (DNTF) in different solvents

“…We notice that some discrepancy, which is graphically shown in figure 4, exists between our solubility values of methanol and ethanol with those of reference [6]. Our nine experimental solubility values increase as the exponential rate in all solvents, and the higher is the temperature, the change of the solubility becomes more obvious.…”

“…The reagent cannot be used as the solution for crystallization when the solubility changes little with a change of temperature. However, few items exist of solubility values for DNTF [6], so the measurement of the solubility of DNTF in different solvents is important.…”

The Solubility of Cucurbit[5]uril in Pure Water and Hydrochloric Acid at Different Temperature and Some Relative Thermodynamic Functions

“…As known from the reference, the dissolution enthalpy for a nonideal solution can be obtained from the modified van't Hoff equation. So the dissolution enthalpy (Δ dis H) and entropy (Δ dis S) for CB [5] was calculated by eq.3 base on the reference [27]. (3) where x is the mole fraction solubility of CB[n], Δ fus H and Δ fus S are, respectively, the dissolution enthalpy and dissolution entropy, R is the ideal gas constant (8.314510 J•mol -1 •K -1 ), and T is absolute temperature.…”

Investigation of the Solubility of 3,4‐Diaminofurazan (DAF) and 3,3′‐Diamino‐4,4′‐azoxyfurazan (DAAF) at Temperatures Between 293.15 K and 313.15 K

“…The enthalpy of solution (D sol H)f or DAF and DAAF was calculated using Equation (3) accordingt oR efs. [9,10],aslisted in Ta ble 3and Ta ble 4.…”