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<identifier identifierType='DOI'>10.1039/c9ce01239g</identifier>
<creators>
<creator>
<creatorName>Croitor, L.M.</creatorName>
<affiliation>Institutul de Chimie din Timişoara al Academiei Române, România</affiliation>
</creator>
<creator>
<creatorName>Petric, M.</creatorName>
<affiliation>Institutul de Chimie din Timişoara al Academiei Române, România</affiliation>
</creator>
<creator>
<creatorName>Szerb, E.</creatorName>
<affiliation>Institutul de Chimie din Timişoara al Academiei Române, România</affiliation>
</creator>
<creator>
<creatorName>Vlase, G.</creatorName>
<affiliation>Universitatea de Vest, Timişoara, România</affiliation>
</creator>
<creator>
<creatorName>Bouroş, P.N.</creatorName>
<affiliation>Institutul de Fizică Aplicată, Moldova, Republica</affiliation>
</creator>
<creator>
<creatorName>Ciumacov, I.M.</creatorName>
<affiliation>Institutul de Fizică Aplicată, Moldova, Republica</affiliation>
</creator>
<creator>
<creatorName>Crişan, M.</creatorName>
<affiliation>Institutul de Chimie din Timişoara al Academiei Române, România</affiliation>
</creator>
</creators>
<titles>
<title xml:lang='en'>The role of 4-nitrobenzoic acid polymorphs in the crystallization process of organic acid-base multicomponent systems</title>
</titles>
<publisher>Instrumentul Bibliometric National</publisher>
<publicationYear>2019</publicationYear>
<relatedIdentifier relatedIdentifierType='ISSN' relationType='IsPartOf'>1466-8033</relatedIdentifier>
<subjects>
<subject>Crystal growth</subject>
<subject>Fourier transform infrared spectroscopy</subject>
<subject>organic acids</subject>
<subject>single crystals</subject>
</subjects>
<dates>
<date dateType='Issued'>2019-03-13</date>
</dates>
<resourceType resourceTypeGeneral='Text'>Journal article</resourceType>
<descriptions>
<description xml:lang='en' descriptionType='Abstract'><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&lowast;), 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&lowast;, indicating that 4NBH&lowast; 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></description>
</descriptions>
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<format>uri</format>
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