Scholarlink

<p>This study investigates the thermochemical properties of four bipyridines: 2,2'-bipyridine, 4,4'-dimethyl-2,2'-bipyridine, 5,5'-dimethyl-2,2'-bipyridine and 2,2'-bipyridine-4,4'-dicarboxylic acid, utilizing calorimetric and thermal analysis methods. Differential scanning calorimetry was employed to determine fusion temperatures and fusion enthalpies. Specific combustion energies were measured using static bomb semi-micro-combustion calorimetry, allowing for the calculation of enthalpies of formation in the condensed phase. Additionally, isothermal thermogravimetry was used to ascertain the rate of mass loss as a function of temperature, from which enthalpies of sublimation were derived. These properties facilitated the calculation of gaseous phase enthalpies of formation at<i> T</i> = 298.15&#xa0;K for the four compounds.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Analysis of bipyridine derivatives by calorimetry and thermogravimetry: a thermochemical perspective

  • 期刊论文

  • 发表日期：

    2025年9月16日

查看全文
  • Eulogio Orozco-Guareño,
  • Ana I. Delgado-Moreno,
  • M. J. Palacios-Sánchez,
  • J. Baudelio Campos-García

摘要

This study investigates the thermochemical properties of four bipyridines: 2,2'-bipyridine, 4,4'-dimethyl-2,2'-bipyridine, 5,5'-dimethyl-2,2'-bipyridine and 2,2'-bipyridine-4,4'-dicarboxylic acid, utilizing calorimetric and thermal analysis methods. Differential scanning calorimetry was employed to determine fusion temperatures and fusion enthalpies. Specific combustion energies were measured using static bomb semi-micro-combustion calorimetry, allowing for the calculation of enthalpies of formation in the condensed phase. Additionally, isothermal thermogravimetry was used to ascertain the rate of mass loss as a function of temperature, from which enthalpies of sublimation were derived. These properties facilitated the calculation of gaseous phase enthalpies of formation at T = 298.15 K for the four compounds.