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Lu YC, Hsu YT, Yang TY, Liou IC, Wang SW, Huang PC, Lee JJ, Lai LL, Hsu HF. Converting non-Mesogenic to Mesogenic Stacking of Amino- s-Triazine-Based Dendrons with p-CN Phenyl Unit by Eliminating Peripheral Dipole. NANOMATERIALS 2022; 12:nano12020185. [PMID: 35055204 PMCID: PMC8782037 DOI: 10.3390/nano12020185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 12/20/2021] [Accepted: 12/31/2021] [Indexed: 12/04/2022]
Abstract
Three new amino-s-triazine-based dendrons, 1a, 1b, and 1c, containing an aryl-CN moiety in the dendritic skeleton were prepared in 72–81% yields (1a: R1 = − N(n-C8H17)2, R2 = n-OC8H17, 1b: R1 = R2 = − N(n-C8H17)2, 1c: R1 = − N(n-C8H17)2, R2 = − N(n-C4H9)2). Dendrons 1a with N(n-C8H17)2 and n-OC8H17 peripheral substituents, surprisingly, did not show any mesogenic phase during the thermal process. However, non-mesogenic 1a can be converted to mesogenic 1b or 1c by eliminating the peripheral dipole arising from the alkoxy substituent; dendron 1b only comprising the same N(n-C8H17)2 peripheral groups showed a ~25 °C mesogenic range on heating and ~108 °C mesogenic range on cooling. In contrast, dendron 1c possessing different N(n-CmH2m+1)2 (m = 8 versus m = 4) peripheral units, having similar stacking as 1b, exhibited a columnar phase on thermal treatment, but its mesogenic range (~9 and ~66 °C on heating and cooling, respectively) was much narrower than that of 1b, attributed to 1c’s less flexible alkyl chains in the peripheral part of dendron. Dendron 1a with the alkoxy substituent in the peripheral skeleton, creating additional dipole correspondingly, thus, leads to the dendritic molecules having a non-mesogenic stacking. Without the peripheral dipole for intermolecular side-by-side interaction, dendrons 1b and 1c exhibit a columnar phase on thermal treatment because of the vibration from the peripheral alkyl chain.
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Affiliation(s)
- Yao-Chih Lu
- Department of Applied Chemistry, National Chi Nan University, No. 1 University Rd., Puli, Nantou 545, Taiwan; (Y.-C.L.); (T.-Y.Y.); (I.-C.L.); (S.-W.W.)
| | - Yu-Tsz Hsu
- Department of Chemistry, Tamkang University, No. 151, Yingzhuan Rd., New Taipei City 251, Taiwan;
| | - Tsung-Yen Yang
- Department of Applied Chemistry, National Chi Nan University, No. 1 University Rd., Puli, Nantou 545, Taiwan; (Y.-C.L.); (T.-Y.Y.); (I.-C.L.); (S.-W.W.)
| | - I-Chun Liou
- Department of Applied Chemistry, National Chi Nan University, No. 1 University Rd., Puli, Nantou 545, Taiwan; (Y.-C.L.); (T.-Y.Y.); (I.-C.L.); (S.-W.W.)
| | - Sheng-Wei Wang
- Department of Applied Chemistry, National Chi Nan University, No. 1 University Rd., Puli, Nantou 545, Taiwan; (Y.-C.L.); (T.-Y.Y.); (I.-C.L.); (S.-W.W.)
| | - Po-Chia Huang
- National Synchrotron Radiation Research Center, No. 101, Hsin-Ann Rd., Hsinchu 300, Taiwan; (P.-C.H.); (J.-J.L.)
| | - Jey-Jau Lee
- National Synchrotron Radiation Research Center, No. 101, Hsin-Ann Rd., Hsinchu 300, Taiwan; (P.-C.H.); (J.-J.L.)
| | - Long-Li Lai
- Department of Applied Chemistry, National Chi Nan University, No. 1 University Rd., Puli, Nantou 545, Taiwan; (Y.-C.L.); (T.-Y.Y.); (I.-C.L.); (S.-W.W.)
- Correspondence: (L.-L.L.); (H.-F.H.)
| | - Hsiu-Fu Hsu
- Department of Chemistry, Tamkang University, No. 151, Yingzhuan Rd., New Taipei City 251, Taiwan;
- Correspondence: (L.-L.L.); (H.-F.H.)
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Long H, Gu P, Jin G, Su H. Preparation of diatomite supported calcium ferrite ternary magnetic material and its adsorption of selenite in aqueous solution. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Bede LA, Koffi AK, Beke FLED, Semmeq A, Badawi M. Investigation of tautomerism of 1,3,5-triazine derivative, stability, and acidity of its tautomers from density functional theory. J Mol Model 2021; 27:147. [PMID: 33934244 DOI: 10.1007/s00894-021-04774-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Accepted: 04/21/2021] [Indexed: 11/29/2022]
Abstract
Recent studies have identified N2,N4-bis(4-fluorophenethyl)-N6-(3-(dimethylamino)propyl)-1,3,5-triazine-2,4,6-triamine (1TZ(7,8,9)) as a potent, pure antagonist that inhibits thermosensory transient receptor potential vanilloid 1 channel (TRPV1) channel activity. This study provides theoretical data on the stability and acidity of the tautomers of this molecule. We show that this triazine can exist as three predominant tautomers (2TZ(5,7,8), 4TZ(3,7,9), 7TZ(1,8,9)). In the aqueous phase, equilibrium constants calculations show that only the tautomeric equilibria between 1TZ(7,8,9) and the three most stable triazines can be present which suggests that these three tautomeric equilibria would be the basis of 1TZ(7,8,9)'s biological activity.
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Affiliation(s)
- Lucie Affoue Bede
- Laboratoire de Constitution et Réaction de la Matière (LCRM), Université Felix Houphouët-Boigny, 22 BP 582, Abidjan 22, Côte d'Ivoire.
| | - Alain Kouassi Koffi
- Laboratoire de Constitution et Réaction de la Matière (LCRM), Université Felix Houphouët-Boigny, 22 BP 582, Abidjan 22, Côte d'Ivoire
| | - Fred-Lawson Ekozias Digre Beke
- Laboratoire de Constitution et Réaction de la Matière (LCRM), Université Felix Houphouët-Boigny, 22 BP 582, Abidjan 22, Côte d'Ivoire
| | - Abderrahmane Semmeq
- Laboratoire de Physique et Chimie Théoriques UMR 7019, CNRS et Université de Lorraine, BP239, Boulevard des Aiguillettes, 54 506, Vandoeuvre-lès- Nancy-Cedex, France
| | - Michael Badawi
- Laboratoire de Physique et Chimie Théoriques UMR 7019, CNRS et Université de Lorraine, BP239, Boulevard des Aiguillettes, 54 506, Vandoeuvre-lès- Nancy-Cedex, France.
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Forgionny A, Acelas NY, Ocampo-Pérez R, Padilla-Ortega E, Leyva-Ramos R, Flórez E. Understanding mechanisms in the adsorption of lead and copper ions on chili seed waste in single and multicomponent systems: a combined experimental and computational study. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:23204-23219. [PMID: 33439444 DOI: 10.1007/s11356-020-11721-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Accepted: 11/16/2020] [Indexed: 06/12/2023]
Abstract
In the current work, a deep study to understand the adsorption phenomena occurring in single and multicomponent systems was conducted by using spectroscopic characterization, and computational tools. The experimental results showed that the adsorption capacity of chili seed is higher for Pb2+ (48 mg/g) than Cu2+ (4.1 mg/g) ions in single systems. However, the adsorption study in multicomponent systems provides important conclusions of the concentration effect of the metal ions, showing a significant antagonistic and competitive effect of both ions under equivalent concentrations of them (qPb2+ is 56% reduced) or high concentration of Pb2+ (qCu2+ is 50% reduced). Computational results correlated well with the experimental ones and evidenced all interactions proposed from spectroscopy results, accounting for the occurrence of complexation and electrostatic mechanisms between metal ions and the surface oxygenated functional groups (hydroxyl, carboxyl, and carboxylate) onto chili seed. Chemistry quantum descriptors supported the reactivity behavior of the chemical species implicated. All results evidenced that Pb2+ and Cu2+ adsorption on chili seed surface is governed by the occurrence of combined ionic exchange, π-interaction, complexation, and electrostatic attraction.
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Affiliation(s)
- Angélica Forgionny
- Grupo de Materiales con Impacto, Mat&mpac. Facultad de Ciencias Básicas, Universidad de Medellín, Medellín, Colombia.
| | - Nancy Y Acelas
- Grupo de Materiales con Impacto, Mat&mpac. Facultad de Ciencias Básicas, Universidad de Medellín, Medellín, Colombia
| | - Raúl Ocampo-Pérez
- Centro de Investigación y Estudios de Posgrado, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosi, 78260, San Luis Potosi, Mexico.
| | - Erika Padilla-Ortega
- Centro de Investigación y Estudios de Posgrado, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosi, 78260, San Luis Potosi, Mexico
| | - Roberto Leyva-Ramos
- Centro de Investigación y Estudios de Posgrado, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosi, 78260, San Luis Potosi, Mexico
| | - Elizabeth Flórez
- Grupo de Materiales con Impacto, Mat&mpac. Facultad de Ciencias Básicas, Universidad de Medellín, Medellín, Colombia.
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Hong SH, Shin MC, Lee J, Lee CG, Song DS, Um BH, Park SJ. Recycling of bottom ash derived from combustion of cattle manure and its adsorption behaviors for Cd(II), Cu(II), Pb(II), and Ni(II). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:14957-14968. [PMID: 33222064 DOI: 10.1007/s11356-020-11719-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 11/16/2020] [Indexed: 06/11/2023]
Abstract
Bottom ash generated by the combustion of cattle manure (BA-CCM) was investigated as an adsorbent for the removal of heavy metals such as Cd(II), Cu(II), Pb(II), and Ni(II) from aqueous solutions. When cattle manure was used as fuel, the thermal efficiency of the boiler was 88.7%, and the CO and CO2 concentrations in the exhaust gas were 2.3 ppm and 12.1%, respectively. The percentage of remaining solids was 31 wt.% after combustion at 900 °C. X-ray fluorescence analyses showed that the elemental composition of the BA-CCM was mainly CaO (43.3%), SiO2 (15.8%), CO2 (13.0%), and P2O5 (10.3%). The kinetic adsorption of Cd(II), Cu(II), Pb(II), and Ni(II) by BA-CCM reached equilibrium after 12 h, and the pseudo-second-order model fitted the experimental data well. The maximum amount of Cd(II), Cu(II), Pb(II), and Ni(II) adsorbed by the bottom ash was 5.4, 72.6, 88.2, and 24.6 mg/g, respectively. The equilibrium adsorption of metals onto BA-CCM was well-described by the Freundlich model. Thermodynamic analysis showed that the adsorption onto the bottom ash was endothermic and that the Gibbs free energy decreased as the temperature increased. The presence of cations such as Na+, Ca2+, and Al3+ was found to reduce the amount of metals adsorbed onto the BA-CCM, and Cd(II) adsorption was found to be more dependent on ionic strength than adsorption of Cu(II), Pb(II), and Ni(II). This study demonstrates the feasibility of producing heat energy by burning cattle manure and removing heavy metals from aqueous solutions using the generated bottom ash as an adsorbent.
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Affiliation(s)
- Seung-Hee Hong
- Department of Integrated System Engineering, Hankyong National University, Anseong, 17579, Republic of Korea
| | - Myung-Chul Shin
- Department of clean energy, Korea Institute of Industrial Technology, Cheonan, 31056, Republic of Korea
| | - Jechan Lee
- Department of Environmental and Safety Engineering, Ajou University, Suwon, 16499, Republic of Korea
- Department of Energy Systems Research, Ajou University, Suwon, 16499, Republic of Korea
| | - Chang-Gu Lee
- Department of Environmental and Safety Engineering, Ajou University, Suwon, 16499, Republic of Korea
| | - Dae-Sung Song
- Department of Water Quality & Safety Research, K-water, Daejeon, 34350, Republic of Korea
| | - Byung-Hwan Um
- School of Food Biotechnology and Chemical Engineering, Hankyong National University, Anseong, 17579, Republic of Korea
| | - Seong-Jik Park
- School of Social Safety and System Engineering, Hankyong National University, Anseong, 17579, Republic of Korea.
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Eliodório KP, Pereira GJ, Morandim‐Giannetti A. Functionalized chitosan with butylammonium ionic liquids for removal of Cr(
VI
) from aqueous solution. J Appl Polym Sci 2020. [DOI: 10.1002/app.49912] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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