The template synthesis and characterization of new mono- and dinuclear Schiff base complexes of lanthanide(III) ions

Nawrocka, Justyna; Patroniak, Violetta

doi:10.1016/j.jallcom.2004.03.079

Cited by 17 publications

(5 citation statements)

References 14 publications

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“…The room temperature µ eff values (Table 1) of all the Ln III complexes (2.32, 3.07, 1.31, 1.89, 5.54, 7.98, 8.78 and 9.92 BM for Ln = Pr, Nd, Sm, Eu, Gd, Tb, Dy, and Ho respectively) in the present study have been found to be lower than the reported van Vleck values presumably on account of metal-metal interactions [36][37][38][39].…”

Section: Magnetic and Electronic Spectral Studiescontrasting

confidence: 70%

Ligational aspects of some 4f metal complexes of a mesogenic Schiffbase, N,N’- di-(4-dodecyloxysalicylidene)-1’,3’-diaminopropane: Synthesis and spectral studies

Shrestha

Shakya

2022

J. Nepal Chem. Soc.

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A liquid crystalline (smectic-F and smectic-A phases)Schiff base, N,N′-di-(4-dodecyloxysalicylidene)-1′,3′-diaminopropane(abbreviated as H2L) and a series of lanthanide (III) complexes of the type [Ln2(LH2)3(NO3)4](NO3)2, (Ln = La, Pr, Nd, Sm, Eu, Gd, Tb, Dy and Ho) have been synthesized and characterized by elemental analysis, mass spectrometry, FTIR, and UV-Vis spectral techniques. The IR spectral data imply bidentate chelation of the Schiff base in its zwitterionic form (as LH2) to the LnIII ions through two phenolate oxygens, rendering the overall geometry of the complexes possibly to distorted mono-capped octahedra. The optical and thermal behavior studies (POM & DSC techniques) reveal that despite H2L being mesogenic, none of the LnIII complexes synthesized under this study exhibits mesomorphism. Fluorescence studies show emissions of H2L and SmIII complexx.

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Section: Magnetic and Electronic Spectral Studiescontrasting

confidence: 70%

Ligational aspects of some 4f metal complexes of a mesogenic Schiffbase, N,N’- di-(4-dodecyloxysalicylidene)-1’,3’-diaminopropane: Synthesis and spectral studies

Shrestha

Shakya

2022

J. Nepal Chem. Soc.

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“…The polyfunctional acyclic and asymmetric ligands and their complexes represent an essential component of coordination chemistry [1][2][3][4][5][6][7][8][9]. These ligands are largely used for the synthesis of complexes with biochemical and physical properties [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization and Single Crystal X–ray Crystallography of Nd(III) and Pr(III) Complexes with the Tridentate Schiff Base Ligand N'–(1–(pyridin–2–yl)ethylidene)nicotinohydrazide

Faye

Gaye

Sow

et al. 2021

EJCS

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The use of N'–(1–(pyridin–2–yl)ethylidene)nicotinohydrazide (HL) in lanthanide(III) chemistry has yielded one mononuclear and one dinuclear complexes. The 1:1 Nd(NO3)3.6H2O or Pr(CH3COO)3.6H2O/HL in methanol afforded the complexes [Nd (HL)2(NO3)2(H2O)2].(NO3) (1) and {[Pr(L)(h2–OOCCH3)(H2O)](h1:h2:m–OOCCH3)2[Pr (L)(h2–OOCCH3)(H2O)]} (2). The structures of the complexes were solved by single crystal X–ray crystallography. In the mononuclear complex, the Nd3+ atom is coordinated by two neutral molecules of ligand acting in tridentate fashion, two nitrate anions acting in bidentate manner and two coordinated water molecules yielding a twelve–coordinated Nd atom. In the complex (2) the Pr3+ atoms are doubly bridged by two acetates anions and each metal ion is coordinated by one tridentate monodeprotonated molecule ligand, one bidentate acetate group and one coordinated water molecule. Each Pr3+ atom is nine–coordinated with an environment best described as a tricapped prismatic geometry. Complex 1 crystallizes in the monoclinic space group C2/c with the following parameters: a = 22.7657(8) Å, b = 8.4276(3) Å, c = 18.0831(7) Å, b = 114.851(2)°, V = 3148.2(2) Å3, Z = 4, R1 = 0.032, wR2 = 0.098. Complex 2 crystallizes in the monoclinic space group P21/n with the following parameters: a = 11.5388(6) Å, b = 14.1087(8) Å, c = 12.2833(6) Å, b = 102.211(2)°, V = 1954.45(18) Å3, Z = 2, R1 = 0.029, wR2 = 0.066. The supramolecular structures are consolidated by multiple hydrogen bonds.

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“…The Ln III complexes also exhibit three additional bands around 1488-1473, 1258-1255, and 847-844 cm -1 , which can be assigned to the vibrational modes of the coordinated (C 2v ) nitrate groups [27]. The magnitude of splitting at higher energies, 231-215 cm -1 , suggests that the coordinated nitrate groups act as bidentate ligands [27,28]. The additional bands observed at 1385-1383 cm -1 are due to the non-coordinated nitrate present in the complexes.…”

Section: Magnetic and Spectral Investigationmentioning

confidence: 97%

Synthesis, Structural Studies of Some Lanthanide Complexes of the Mesogenic Schiff‐Base, N,N′ ‐di‐(4′‐Octadecyloxybenzoate)Salicylidene‐I″, 3″‐Diamino‐2″‐Propanol

Kumari¹

2013

Nanostructured Materials and Nanotechnology VII

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A mesogenic Schiff-base, N,N '-di-(4'-octyloxybenzoate)salicylidene-l'',3''-diamino-2''-propanol (H 2 L 5 ) was synthesized and its structure studied by elemental analyses and mass, NMR and IR spectra and ligated to some Ln III metal ions that yielded mesogenic (N / SmA) Ln III complexes of the general composition, [Ln(L 5 H 2 ) 3 (NO 3 )](NO 3 ) 2 , where Ln=La, Pr, Nd, Sm, Eu, Gd, Tb, Dy and Ho. Among the metal complexes, only that of La III is found to be mesogenic. with smectic-X and nematic phases. The IR and NMR spectral data imply a bi-dentate bonding of the Schiff-base in its zwitterionic form (as L 5 H 2 ) to the Ln III ions through two phenolate oxygens, rendering the overall geometry around Ln III to eight-coordinated polyhedron, possibly distorted Square Antiprism.

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The template synthesis and characterization of new mono- and dinuclear Schiff base complexes of lanthanide(III) ions

Cited by 17 publications

References 14 publications

Ligational aspects of some 4f metal complexes of a mesogenic Schiffbase, N,N’- di-(4-dodecyloxysalicylidene)-1’,3’-diaminopropane: Synthesis and spectral studies

Ligational aspects of some 4f metal complexes of a mesogenic Schiffbase, N,N’- di-(4-dodecyloxysalicylidene)-1’,3’-diaminopropane: Synthesis and spectral studies

Synthesis, Characterization and Single Crystal X–ray Crystallography of Nd(III) and Pr(III) Complexes with the Tridentate Schiff Base Ligand N'–(1–(pyridin–2–yl)ethylidene)nicotinohydrazide

Synthesis, Structural Studies of Some Lanthanide Complexes of the Mesogenic Schiff‐Base, N,N′ ‐di‐(4′‐Octadecyloxybenzoate)Salicylidene‐I″, 3″‐Diamino‐2″‐Propanol

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