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<p>A new orthorhombic cocrystal, glutaric acid–urea (GAU), was successfully synthesized via a controlled slow-evaporation technique and comprehensively characterized. Single-crystal X-ray diffraction (SCXRD) confirmed an orthorhombic <i>Pnma</i> structure, while powder X-ray diffraction (PXRD) validated phase purity and crystallinity. Thermal analysis using thermogravimetric analysis and differential scanning calorimetric analysis (TGA/DSC) indicated a two-step endothermic decomposition process initiated at around 130&#xa0;°C and completed around 277&#xa0;°C, validating good thermal stability. The experimentally measured mass losses are in good agreement with the theoretical molar decomposition data, which proves the stoichiometric composition of the cocrystal and its thermal stability. Raman spectroscopy detected typical vibrational modes and intermolecular hydrogen-bonding interactions. Optical analysis revealed that the material was highly transparent in the near-UV and visible spectra with a bandgap of 4.926&#xa0;eV, indicating a wide-bandgap dielectric material with semiconducting characteristics. Electrochemical tests revealed that the material has quasi-reversible redox activity, high charge-transfer resistance, and capacitive properties, highlighting its multifunctional characteristics. Observation of high transmittance in the near-UV and visible spectra, high absorbance in the deep-UV range, a wide bandgap, and thermal stability up to 130&#xa0;°C make the GAU cocrystals promising for applications in UV filters, optical windows, and UV detectors. Additionally, the observed resistive-capacitive characteristics support its use in electrochemical and related charge-storage devices.</p>

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Thermal stability and multifunctional properties of a new glutaric acid–urea cocrystal

  • 期刊论文

  • 发表日期：

    2026年6月17日

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  • Helen Merina Albert,
  • SK. Fakruddin Babavali,
  • D. Neelima Patnaik,
  • B. Uma,
  • N. R. Rajagopalan,
  • Maddikera Kalyan Chakravarthi,
  • Nellore Manoj Kumar,
  • C. Alosious Gonsago

摘要

A new orthorhombic cocrystal, glutaric acid–urea (GAU), was successfully synthesized via a controlled slow-evaporation technique and comprehensively characterized. Single-crystal X-ray diffraction (SCXRD) confirmed an orthorhombic Pnma structure, while powder X-ray diffraction (PXRD) validated phase purity and crystallinity. Thermal analysis using thermogravimetric analysis and differential scanning calorimetric analysis (TGA/DSC) indicated a two-step endothermic decomposition process initiated at around 130 °C and completed around 277 °C, validating good thermal stability. The experimentally measured mass losses are in good agreement with the theoretical molar decomposition data, which proves the stoichiometric composition of the cocrystal and its thermal stability. Raman spectroscopy detected typical vibrational modes and intermolecular hydrogen-bonding interactions. Optical analysis revealed that the material was highly transparent in the near-UV and visible spectra with a bandgap of 4.926 eV, indicating a wide-bandgap dielectric material with semiconducting characteristics. Electrochemical tests revealed that the material has quasi-reversible redox activity, high charge-transfer resistance, and capacitive properties, highlighting its multifunctional characteristics. Observation of high transmittance in the near-UV and visible spectra, high absorbance in the deep-UV range, a wide bandgap, and thermal stability up to 130 °C make the GAU cocrystals promising for applications in UV filters, optical windows, and UV detectors. Additionally, the observed resistive-capacitive characteristics support its use in electrochemical and related charge-storage devices.