Hexaaza macrocyclic complexes of the lanthanides

Cola, Luisa De; Smailes, D. L.; Vallarino, L. M.

doi:10.1021/ic00230a042

Cited by 100 publications

(20 citation statements)

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“…All products were characterized by UV-Vis, IR and MS spectroscopy. 23 The bands of the perchlorate complexes did not suggest interaction of perchlorate anions with the metal. The receptors formed stable complexes with Cu(II), Ni(II), Zn(II), Cd(II) and Pb(II) at room temperature.…”

Section: Application To the Removal Of Heavy Metals From Water Samplesmentioning

confidence: 95%

“…The yields, colors, elemental analyses and mass spectrometry data of the ligands and their complexes are given in Table II. 23 Therefore, it could be concluded that the L1 and L2 ligands bound to the metal ions through nitrate N groups. The complexes were isolated in high yield (71-96 %) as colored crystalline mononuclear solids.…”

Section: Application To the Removal Of Heavy Metals From Water Samplesmentioning

confidence: 99%

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Polyaza macroligands as potential agents for heavy metal removal from wastewater

Elizondo

Nájera

Pérez

et al. 2013

JSCS

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Two polyaza macroligands N,N´-bis(2-aminobenzyl)-1,2- ethanediamine (L1) and 3,6,9,12-tetraaza-4(1,2),11(1,2)-dibenzo-1(1,3)- piridinaciclotridecafano (L2) were characterized and investigated for their metal ion extraction capabilities. The nature of all complexes was established by spectroscopic techniques. The equilibrium constants were determined by spectrophotometric and potentiometric techniques and the residual concentration of metals in the solutions by Atomic Absorption Spectrometry (AAS). The capacity of the ligands to remove heavy metals such as Cu(II), Ni(II), Cd(II), Zn(II) and Pb(II) as insoluble complexes was evaluated in wastewater from industrial effluents. These agents showed high affinity for the studied metals. The values of equilibrium constants of the isolated complexes (between 1 x 104 and 2 x 107) demonstrated the feasibility of applying these chelating agents as an alternative to remove heavy metals from industrial effluents

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Section: Application To the Removal Of Heavy Metals From Water Samplesmentioning

confidence: 95%

Section: Application To the Removal Of Heavy Metals From Water Samplesmentioning

confidence: 99%

Polyaza macroligands as potential agents for heavy metal removal from wastewater

Elizondo

Nájera

Pérez

et al. 2013

JSCS

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“…The spectra of all the complexes were similar to that of uncoordinated N-heterocycle except for minor shifts in the position of the peaks. The IR spectrum of the ligand showed the absence of peaks due to νNH 2 or νC-O of the precursor m-aminophenyl benzimidazole and salicyladehyde which suggested the complete formation of azomethine linkage [32][33][34][35]. A peak at 1312 cm -1 and shift in νC-N and νO-H compared to the vibrations in usual Schiff bases suggested the presence of intramolecular H-bonding between OH group and the azomethine nitrogen atom [36].…”

Section: Synthesis Of [Cu(oclo3)l2]2(clo4)2·4h2o [Cucl2l]2 and [Cubrmentioning

confidence: 98%

Synthesis, Characterization and Antimicrobial Activities of Copper(II) Complexes of Schiff Base Ligand 2-[(3′-N-salicylidinephenyl)benzimidazole]

Roopashree

Gayathri

2019

Asian J. Chem.

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CuX2·6H2O (X = Cl–, Br– or ClO4–) reacted with a Schiff base ligand 2-[(3′-N-salicylidinephenyl)benzimidazole] in 1:2 mole ratio in methanol to yield brown colored complexes of types [CuCl2L]2, [CuBr1.5L1.5]2Br and [Cu(OClO3)L2]2(ClO4)2·4H2O. The complexes were characterized by analytical and spectroscopic studies such as elemental analysis, conductivity and magnetic moment measurements, thermogravimetric analysis, IR, far-IR, electronic, ESR and mass spectral studies. IR spectral studies suggested the coordination of ligand to the central metal atom via tertiary nitrogen of benzimidazole and nitrogen of azomethine group. Based on these studies, binuclear structure was proposed for all the copper complexes. The ligand and its copper(II) complexes were screened for antibacterial and antifungal activities.

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“…1120 (1/3) and 630 (1/4) cm-1, assignable to the asymmetric Cl-O stretching mode and the asymmetric Cl-O bending mode, respec tively, of the perchlorate group [31,32]. Both exhibit considerable splitting due to the reduced symmetry of the coordinated species, suggesting some inter action of at least one of the CIO4-anions with the metal [33]. The z/3 band has three maxima at ca.…”

Section: Etal Complexes O F Lmentioning

confidence: 99%

Four Novel N₃O₄ Donor Macrocycles and their Lanthanide(III) Complexes

Bértolo

Bastida

Blas

et al. 1998

Zeitschrift Für Naturforschung B

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E m ilia Bértolo2, Rufina B astidaa'*, A ndrés de Blasb, D avid E. Fenton0, A lejandro M acíasa, A dolfo R odrígueza, Teresa Rodríguez-B lasb, A na V illar1 dDepartamento A new series of lanthanide(III) complexes with two novel Schiff-base macrocycles, L 1 and L2, containing a N3O4 donor set have been prepared by cyclocondensation of 2,6-bis(2-formylphenoxymethyl)pyridine and l,2-bis(2-aminophenoxy)ethane or l,3-bis(2-aminophenoxy)propane, respectively, in the presence of the appropriate metal salt as a template agent. In the absence of the metal salt the macrocycles are not formed. The diamine macrocycles L3 and L4 are also formed by reaction of the corresponding diamine and dicarbonyl precursors followed by an in situ reduction with NaBH4. Their complexation potential towards Ln(III) ions were also investigated.

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Hexaaza macrocyclic complexes of the lanthanides

Cited by 100 publications

References 0 publications

Polyaza macroligands as potential agents for heavy metal removal from wastewater

Polyaza macroligands as potential agents for heavy metal removal from wastewater

Synthesis, Characterization and Antimicrobial Activities of Copper(II) Complexes of Schiff Base Ligand 2-[(3′-N-salicylidinephenyl)benzimidazole]

Four Novel N₃O₄ Donor Macrocycles and their Lanthanide(III) Complexes

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Hexaaza macrocyclic complexes of the lanthanides

Cited by 100 publications

References 0 publications

Polyaza macroligands as potential agents for heavy metal removal from wastewater

Polyaza macroligands as potential agents for heavy metal removal from wastewater

Synthesis, Characterization and Antimicrobial Activities of Copper(II) Complexes of Schiff Base Ligand 2-[(3′-N-salicylidinephenyl)benzimidazole]

Four Novel N3O4 Donor Macrocycles and their Lanthanide(III) Complexes

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Four Novel N₃O₄ Donor Macrocycles and their Lanthanide(III) Complexes