Synthesis, chemical and physical properties of lanthanide(III) (Nd, Gd, Tb) complexes derived from (E)-ethyl 4-(2-hydroxybenzylideneamino)benzoate

Abu-Yamin, Abdel-Aziz; Taher, Deeb; Korb, Marcus; Khalyfeh, Khaled Al; Ishtaiwi, Zakariyya; Juwhari, Hassan K.; Amarne, Hazem; Mahmood, Sami H.; Loloee, R.; Yousef, Y.A.; Ghazzy, Asma; Lang, Heinrich

doi:10.1016/j.poly.2022.115906

Cited by 9 publications

(4 citation statements)

References 66 publications

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“…The first small decomposition occurred in the temperature range from 25 to 200 °C, which mainly refers to the loss of coordinated water molecules from the inner coordination sphere of the L 1 –L 3 complex (for complexes <2.5 wt%) and for crystalline water from zinc complex as its loss increases a little bit after 95 °C. The second large decomposition step within the temperature range 235–390 °C accounts for the removal of NO 3 − ions in the form of N 2 O 5 , as reported in the literature for related complexes [ 67 ]. The third stage corresponds to the decomposition of the complex moiety with increasing temperature, leaving about 45% as a residue after the decomposition steps and the organic loss of the complexes is due to the formation of La 2 O 3 (Ln = Gd, Sm, and Nd) and, with respect to the zinc complex, it is about 34% for ZnO and ash [ 67 ].…”

Section: Resultsmentioning

confidence: 94%

“…The second large decomposition step within the temperature range 235–390 °C accounts for the removal of NO 3 − ions in the form of N 2 O 5 , as reported in the literature for related complexes [ 67 ]. The third stage corresponds to the decomposition of the complex moiety with increasing temperature, leaving about 45% as a residue after the decomposition steps and the organic loss of the complexes is due to the formation of La 2 O 3 (Ln = Gd, Sm, and Nd) and, with respect to the zinc complex, it is about 34% for ZnO and ash [ 67 ].…”

Section: Resultsmentioning

confidence: 94%

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Synthesis, Characterization, and DFT Calculations of a New Sulfamethoxazole Schiff Base and Its Metal Complexes

et al. 2023

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A new Schiff base, 4-((1E,2E)-3-(furan-2-yl)allylidene)amino)-N-(5-methylisoxazol-3-yl) benzene-sulfonamide (L), was synthesized by thermal condensation of 3-(2-furyl)acrolein and sulfamethoxazole (SMX), and the furan Schiff base (L) was converted to a phenol Schiff base (L’) according to the Diels–Alder [4 + 2] cycloaddition reaction and studied experimentally. The structural and spectroscopic properties of the Schiff base were also corroborated by utilizing density functional theory (DFT) calculations. Furthermore, a series of lanthanide and transition metal complexes of the Schiff base were synthesized from the nitrate salts of Gd, Sm, Nd, and Zn (L1, L2, L3, and L4), respectively. Various spectroscopic studies confirmed the chemical structures of the Schiff-base ligand and its complexes. Based on the spectral studies, a nine-coordinated geometry was assigned to the lanthanide complexes and a six-coordinated geometry to the zinc complex. The elemental analysis data confirmed the suggested structure of the metal complexes, and the TGA studies confirmed the presence of one coordinated water molecule in the lanthanide complexes and one crystalline water molecule in the zinc complex; in addition, the conductivity showed the neutral nature of the complexes. Therefore, it is suggested that the ligand acts as a bidentate through coordinates to each metal atom by the isoxazole nitrogen and oxygen atoms of the sulfur dioxide moiety of the SMX based on FTIR studies. The ligand and its complexes were tested for their anti-inflammatory, anti-hemolytic, and antioxidant activities by various colorimetric methods. These complexes were found to exhibit potential effects of the selected biological activities.

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Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 94%

Synthesis, Characterization, and DFT Calculations of a New Sulfamethoxazole Schiff Base and Its Metal Complexes

et al. 2023

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“…This included exploring the significance of H⋯N, H⋯O, and π⋯π stacking interactions in establishing the configuration of the extended structure. 95–100 Fig. 4 shows the Hirshfeld surfaces mapped over the d norm of 3 , 7 , and 9 .…”

Section: Resultsmentioning

confidence: 99%

“…This included exploring the signicance of H/N, H/O, and p/p stacking interactions in establishing the conguration of the extended structure. [95][96][97][98][99][100] For each compound, in the crystal packing the bright and deep-red spot in the Hirshfeld surface indicates the closest distance between the atoms at the exterior (d e ) and interior (d i ) of the compound. Fingerprint plots (Fig.…”

Section: Hirshfeld Surfaces Analysismentioning

confidence: 99%