Journal
THERMOCHIMICA ACTA
Volume 717, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.tca.2022.179361
Keywords
Organic crystal growth; X-ray diffraction; Differential scanning calorimetry; Polymorphic phase transitions; Melting
Funding
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [1711139323]
- National Research Foundation of Korea (NRF) - Korean Government (MSIT) [2020R1A2C101083111]
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The powder X-ray diffraction (PXRD) and differential scanning calorimetry (DSC) were used to characterize the structure and detect phase transformations of polycrystalline (+)-decursinol. The crystal system of decursinol was determined to be orthorhombic with a space group P212121 using PXRD. DSC analysis showed two polymorphic phase transitions at approximately 64°C and 68°C, and a melting peak at an extrapolated onset temperature of approximately 177°C.
The powder X-ray diffraction (PXRD) and differential scanning calorimetry (DSC) have been conducted both for structural characterization of polycrystalline (+)-decursinol (C14H14O4) and for detecting phase transformations. Using PXRD, the crystal system of decursinol was determined to be orthorhombic with a space group P212121, and the lattice parameters were derived. Upon heating in DSC, two polymorphic phase transitions were recog-nized as weak endothermic peaks around Tc2+approximate to 64 degrees C and Tc1+approximate to 68 degrees C. Further heating showed a large peak of melting with the extrapolated onset temperature Tm,o approximate to 177 degrees C.
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