| Conţinutul numărului revistei |
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 SM ISO690:2012CROITOR, Lilia, PETRIC, M., SZERB, Elisabeta Ildyko, VLASE, Gabriela, BOUROSH, Pavlina, CHUMAKOV, Yurii, CRIŞAN, Manuela E.. The role of 4-nitrobenzoic acid polymorphs in the crystallization process of organic acid-base multicomponent systems. In: CrystEngComm, 2019, vol. 21, pp. 6038-6047. ISSN 1466-8033. DOI: https://doi.org/10.1039/c9ce01239g |
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  CrystEngComm |
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| Volumul 21 / 2019 / ISSN 1466-8033 | ||||||
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| DOI:https://doi.org/10.1039/c9ce01239g | ||||||
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The role of polymorphs in understanding and controlling the crystallization process from solution of an organic acid-base system is reported. Herein, the crystallization process of dimethylethanolammonium 4-nitrobenzoate (DMEA4NB) is explored through different pathways of crystallization, using 4-nitrobenzoic acid polymorphs crystallized in different space groups: Monoclinic P21/n (4NBH) and C2/c (4NBH∗), respectively. The crystal growth process was investigated by complementary experimental techniques such as single crystal and powder X-ray diffraction, Fourier transform infrared spectroscopy, hot-stage optical microscopy and thermogravimetric analysis correlated with an ab initio computational study. The experimental and theoretical data revealed that 4NBH is more stable than 4NBH∗, indicating that 4NBH∗ is more favorable for a one-step crystal growth process, while the 4NBH polymorph leads to DMEA4NB formation through three intermediate phases. The changes over time associated with solid-solid phase transformations in the crystal growth process are evaluated. The opacification process of DMEA4NB has indicated the partially reversible transformation of the product into an intermediate phase. |
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| Cuvinte-cheie Crystal growth, Fourier transform infrared spectroscopy, organic acids, single crystals |
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Dublin Core Export
<?xml version='1.0' encoding='utf-8'?> <oai_dc:dc xmlns:dc='http://purl.org/dc/elements/1.1/' xmlns:oai_dc='http://www.openarchives.org/OAI/2.0/oai_dc/' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xsi:schemaLocation='http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd'> <dc:creator>Croitor, L.M.</dc:creator> <dc:creator>Petric, M.</dc:creator> <dc:creator>Szerb, E.</dc:creator> <dc:creator>Vlase, G.</dc:creator> <dc:creator>Bouroş, P.N.</dc:creator> <dc:creator>Ciumacov, I.M.</dc:creator> <dc:creator>Crişan, M.</dc:creator> <dc:date>2019-03-13</dc:date> <dc:description xml:lang='en'><p>The role of polymorphs in understanding and controlling the crystallization process from solution of an organic acid-base system is reported. Herein, the crystallization process of dimethylethanolammonium 4-nitrobenzoate (DMEA4NB) is explored through different pathways of crystallization, using 4-nitrobenzoic acid polymorphs crystallized in different space groups: Monoclinic P2<sub>1</sub>/n (4NBH) and C2/c (4NBH∗), respectively. The crystal growth process was investigated by complementary experimental techniques such as single crystal and powder X-ray diffraction, Fourier transform infrared spectroscopy, hot-stage optical microscopy and thermogravimetric analysis correlated with an ab initio computational study. The experimental and theoretical data revealed that 4NBH is more stable than 4NBH∗, indicating that 4NBH∗ is more favorable for a one-step crystal growth process, while the 4NBH polymorph leads to DMEA4NB formation through three intermediate phases. The changes over time associated with solid-solid phase transformations in the crystal growth process are evaluated. The opacification process of DMEA4NB has indicated the partially reversible transformation of the product into an intermediate phase.</p></dc:description> <dc:identifier>10.1039/c9ce01239g</dc:identifier> <dc:source>CrystEngComm () 6038-6047</dc:source> <dc:subject>Crystal growth</dc:subject> <dc:subject>Fourier transform infrared spectroscopy</dc:subject> <dc:subject>organic acids</dc:subject> <dc:subject>single crystals</dc:subject> <dc:title>The role of 4-nitrobenzoic acid polymorphs in the crystallization process of organic acid-base multicomponent systems</dc:title> <dc:type>info:eu-repo/semantics/article</dc:type> </oai_dc:dc>
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