TY - JOUR
T1 - Effects of preferential incorporation of carboxylic acids on the crystal growth and physicochemical properties of aragonite
AU - Lee, Seon Yong
AU - Jo, Uijin
AU - Chang, Bongsu
AU - Lee, Young Jae
N1 - Funding Information:
Funding: This work was supported by grants from the National Research Foundation of Korea funded by the Korea government (grant numbers 2020R1I1A1A01073846 and 2020R1F1A1069495), and the Korea Environment Industry & Technology Institute through the Underground Environmental Pollution Risk Management Technology Development Business Program funded by the Korea Ministry of Environment (grant number 2018002470002).
Funding Information:
Acknowledgments: This work was also supported by a Korea University Grant and the Korea University Future Research Grant (KU-FRG).
PY - 2020/11
Y1 - 2020/11
N2 - The preferential incorporation of carboxylic acids into aragonite and its effects on the crystal growth and physicochemical properties of aragonite were systematically investigated using a seeded co-precipitation system with different carboxylic acids (citric, malic, acetic, glutamic, and phthalic). Aragonite synthesized in the presence of citric and malic acids showed a remarkable decrease in the crystallinity and size of crystallite, and the retardation of crystal growth distinctively changed the crystal morphology. The contents of citric acid and malic acid in the aragonite samples were 0.65 wt % and 0.19 wt %, respectively, revealing that the changes in the physicochemical properties of aragonite were due to the preferential incorporation of such carboxylic acids. Speciation modeling further confirmed that citric acid with three carboxyl groups dominantly existed as a metal-ligand, (Ca-citrate)-, which could have a strong affinity toward the partially positively charged surface of aragonite. This indicates why citric acid was most favorably incorporated among other carboxylic acids. Our results demonstrate that the number of carboxyl functional groups strongly affects the preferential incorporation of carboxylic acids into aragonite; however, it could be suppressed by the presence of other functional groups or the structural complexity of organic molecules.
AB - The preferential incorporation of carboxylic acids into aragonite and its effects on the crystal growth and physicochemical properties of aragonite were systematically investigated using a seeded co-precipitation system with different carboxylic acids (citric, malic, acetic, glutamic, and phthalic). Aragonite synthesized in the presence of citric and malic acids showed a remarkable decrease in the crystallinity and size of crystallite, and the retardation of crystal growth distinctively changed the crystal morphology. The contents of citric acid and malic acid in the aragonite samples were 0.65 wt % and 0.19 wt %, respectively, revealing that the changes in the physicochemical properties of aragonite were due to the preferential incorporation of such carboxylic acids. Speciation modeling further confirmed that citric acid with three carboxyl groups dominantly existed as a metal-ligand, (Ca-citrate)-, which could have a strong affinity toward the partially positively charged surface of aragonite. This indicates why citric acid was most favorably incorporated among other carboxylic acids. Our results demonstrate that the number of carboxyl functional groups strongly affects the preferential incorporation of carboxylic acids into aragonite; however, it could be suppressed by the presence of other functional groups or the structural complexity of organic molecules.
KW - Aragonite
KW - Carboxylic acids
KW - Crystal growth
KW - Physicochemical properties
KW - Preferential incorporation
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U2 - 10.3390/cryst10110960
DO - 10.3390/cryst10110960
M3 - Article
AN - SCOPUS:85094584284
VL - 10
SP - 1
EP - 19
JO - Crystals
JF - Crystals
SN - 2073-4352
IS - 11
M1 - 960
ER -