The carbazochrome (3) solubility in solvent mixtures of DMF (N,N-dimethylformamide, 1) + methanol (2), DMF (1) + ethanol (2), DMF (1) + n-propanol (2), and dimethyl sulfoxide (DMSO, 1) + water (2) was measured by the static method within the temperature range from (278.15 to 318.15) K under atmospheric pressure, p = 101.0 kPa. The solubility of carbazochrome increased with rising mass fraction of DMF or DMSO and temperature. The Jouyban–Acree, van’t Hoff–Jouyban–Acree, and Apelblat–Jouyban–Acree models were used to correlate the obtained solubility, and the Apelblat–Jouyban–Acree model provided better correlation results. The parameters of preferential solvation (δx_1,3) were acquired from the mixture properties with the method of inverse Kirkwood–Buff integrals. The values of δx_1,3 changed nonlinearly with the DMF/DMSO (1) proportion in the studied mixed solvents. The carbazochrome was solvated preferentially by alcohol or water in alcohol or water-rich solutions and preferentially solvated by DMF/DMSO in DMF/DMSO-rich mixtures. It could be speculated that in DMF/DMSO-rich mixtures the interaction by acidic hydrogen bonding with the basic sites of carbazochrome played a significant role in carbazochrome solvation.

中文翻译：

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溶解性以及在溶剂混合物安洛的优先溶剂化ñ，ñ二甲基甲酰胺加甲醇/乙醇/ ñ丙醇和二甲亚砜加水

咔唑铬（3）在DMF（N，N-二甲基甲酰胺，1）+甲醇（2），DMF（1）+乙醇（2），DMF（1）+正丙醇（2）和二甲基二甲醚的溶剂混合物中的溶解度在大气压下，在（278.15至318.15）K的温度范围内，通过静态方法测量了亚砜（DMSO，1）+水（2），p = 101.0 kPa。咔唑铬的溶解度随DMF或DMSO的质量分数和温度的升高而增加。使用Jouyban-Acree模型，van't Hoff-Jouyban-Acree模型和Apelblat-Jouyban-Acree模型关联获得的溶解度，而Apelblat-Jouyban-Acree模型提供了更好的关联结果。优先溶剂化的参数（ΔX _1,3-）是通过反Kirkwood-Buff积分方法从混合物性质中获得的。值ΔX _1,3与DMF / DMSO在所研究的混合溶剂（1）的比例非线性改变。咔唑铬在醇或富含水的溶液中优先被醇或水溶剂化，并在富DMF / DMSO的混合物中优先被DMF / DMSO溶剂化。可以推测，在富含DMF / DMSO的混合物中，酸性氢键与咔唑铬的碱性位点之间的相互作用在咔唑铬的溶剂化中起着重要作用。