Lanthanide(<scp>iii</scp>) morpholine 4-dithiocarbamate complexes: Pr(<scp>iii</scp>) derivative shows first example of polymeric lanthanide(<scp>iii</scp>) dithiocarbamate

Mahato, Mamata; Jana, Partha P.; Harms, Klaus; Nayek, Hari Pada

doi:10.1039/c5ra09595f

Cited by 15 publications

(4 citation statements)

References 25 publications

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“…Room temperature photoluminescence of Eu III diethyldithiocarbamato and diphenyldithiocarbamato complexes was reported by Faustino et al [1]. Mahato et al have reported a series of Ln III morpholine 4-dithiocarbamate complexes with their interesting extended structure in the crystals and the spectroscopic properties in solution [2]. Despite of these studies, the chiroptical properties of lanthanoid(III) dithiocarbamato complexes by means 3-heptafluorobutylrylcamphorate) [11].…”

Section: Introductionmentioning

confidence: 98%

“…Lanthanoid(III) complexes are currently being investigated extensively for a variety of their functionalities and applications, such as optical probes, medicine, microelectronics, and others [1,2]. Among the complexes widely studied, those of sulfur-donating ligands are still limited to report, owing to the unfavorable bond formation between the 'hard acid' lanthanoid ions and 'soft base' sulfur-donor ligands [3].…”

Section: Introductionmentioning

confidence: 99%

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Syntheses and crystal structures of neodymium(III) and europium(III) complexes bearing dimethyl-, pyrrolidine-, or S-prolinol- dithiocarbamato ligands and their natural and magnetic circular dichroism spectra

Yakubu

Suzuki

Kita

2019

Inorganica Chimica Acta

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A series of Nd III and Eu III complexes containing achiral or chiral dithiocarbamato (dtc) ligands, [Ln(Xdtc)3(NN)] {Ln = Nd or Eu; X = dimethyl-(Me2), pyrrolidine-(pyr), or (S)-prolinol-(S-proOH); NN = 1,10-phenanthroline (phen) or 2,2'-bipyridine (bpy)}, were prepared and their crystal structures and spectroscopic properties, in particular the natural circular dichroism (CD) and magnetic circular dichroism (MCD), were investigated. The crystal structures of the complexes analyzed by the X-ray diffraction method showed an 8-coordinate geometry around the Ln III center with comparable structural parameters to one another and to the related complexes reported previously. These complexes exhibited similar spectral patterns in their absorption, natural CD and MCD spectra in solution. Weak but characteristic sharp f-f transition bands were observed in the absorption and MCD spectra, but no CD signals associated with these transitions were observed even in the S-proOHdtc complexes. The MCD spectral pattern of the Eu III complexes revealed a local C2v symmetry around the Ln III center in solution, in contrast to the aqua and the analogous β-diketonato Eu III complexes.

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Syntheses and crystal structures of neodymium(III) and europium(III) complexes bearing dimethyl-, pyrrolidine-, or S-prolinol- dithiocarbamato ligands and their natural and magnetic circular dichroism spectra

Yakubu

Suzuki

Kita

2019

Inorganica Chimica Acta

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“…Lanthanide-based complexes are currently being investigated extensively for a variety of functionalities and applications, such as optical probes, medicine, microelectronics, and others. [1][2][3][4][5][6][7][8][9][10][11] However, only limited kinds of metal complexes can be used as the anticancer drug in clinic among which platinum (II) and ruthenium (III) complexes are the most popular studied. Cancer patients undergoing chemotherapy usually possess a chance of 20% suffering Candida infection, and most antitumor drugs show no antifungal activities.…”

Section: Introductionmentioning

confidence: 99%

A hexanuclear Nd (III) complex derived from a Schiff base with significant antitumor and antifungal activity

Hua

Chen

et al. 2020

Applied Organom Chemis

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A hexanuclear Nd (III) complex {[Nd6(HL)2L2X2(NO3)8(EtOH)6]·(EtOH)(H2O)3} (H2L = 2,3‐dihydroxybenzaldehyde‐4‐aminoantipyrine; H2X = 2,3‐dihydroxy benzaldehyde) has been designed, synthesized, and evaluated for antitumor and antifungal activity. Single‐crystal X‐ray diffraction analysis indicates Nd (III) complex has a trinuclear cluster structure, which further forms a hexanuclear monomer through two bridging ligands L2−. There are π–π interactions and a lot of intramolecular hydrogen bonds between monomers. Antitumor activity of Nd (III) complex against human hepatocellular carcinoma SMMC‐7721 cells has been studied by 3‐(4,5‐dimethyl‐2‐thiazolyl)‐2,5‐diphenyltetrazolium bromide (MTT) assay and morphology observation. The IC50 value of Nd (III) complex ranges from 4.02 to 4.85 μM, much smaller than that of clinical drug (gemcitabin) and free ligand (H2L), which is consistent with its high inhibition rate of 90%. Inhibitory zone of 26 mm reveals the significant antifungal activity of Nd (III) complex against Candida albicans.

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“…The complexes exhibited similar absorption spectral pattern in the UV region as shown in Fig.S11. The band at 340 nm was assigned to the intra-ligand charge transfer transition[24,25]. In the visible region, sharp but weak absorption bands and MCD signals characteristic of f-f transitions were observed in the complexes.…”

mentioning

confidence: 98%

Dinuclear lanthanoid(III) dithiocarbamato complexes bridged by (E)-N-benzylidenepicolinohydrazonate: Syntheses, crystal structures and spectroscopic properties

Yakubu

Suzuki

Kita

2019

Inorganica Chimica Acta

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E)-N-Benzylidenepicolinohydrazide (Hbphz) was used to synthesize a series of hydrazonatobridged homodinuclear Ln III 2 dithiocarbamato (RR'dtc -) complexes of the form [{Ln(RR' dtc)2}2(µ-bphz)2] {Ln = La, Pr, Nd, Sm or Eu; RR' = dimethyl-(Me2) or pyrrolidine-(pyr)}.X-ray crystallographic studies revealed that these complexes possessed a common head-to-tail type dinuclear structural motif in which two hydrazonato ligands bridged two Ln III centers in the -1 2 N(py),O:2 2 O,N(imine) mode and two RR'dtc ligands coordinated to each Ln III center. Interestingly, while the Sm III and Eu III complexes crystallized as simple 8:8-coordinate dinuclear molecules, the lighter Ln III (i.e. La III , Pr III and Nd III ) complexes afforded in some cases 9:9-coordinate molecules, where the ninth coordination site was occupied by a solvent ethanol or methanol molecule. Even for the lighter Ln III complexes, the complexes were solved in dichloromethane or chloroform as the 8:8-coordinate dimer, as revealed by 1 H NMR spectroscopy. In the UV-visible absorption and magnetic circular dichroism (MCD) spectra of the complexes, similar spectral patterns for ligand-centered and Laporte forbidden f-f transitions were observed. The MCD spectral studies demonstrated the characteristic magnetooptical behavior of the complexes.

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Lanthanide(iii) morpholine 4-dithiocarbamate complexes: Pr(iii) derivative shows first example of polymeric lanthanide(iii) dithiocarbamate

Cited by 15 publications

References 25 publications

Syntheses and crystal structures of neodymium(III) and europium(III) complexes bearing dimethyl-, pyrrolidine-, or S-prolinol- dithiocarbamato ligands and their natural and magnetic circular dichroism spectra

Syntheses and crystal structures of neodymium(III) and europium(III) complexes bearing dimethyl-, pyrrolidine-, or S-prolinol- dithiocarbamato ligands and their natural and magnetic circular dichroism spectra

A hexanuclear Nd (III) complex derived from a Schiff base with significant antitumor and antifungal activity

Dinuclear lanthanoid(III) dithiocarbamato complexes bridged by (E)-N-benzylidenepicolinohydrazonate: Syntheses, crystal structures and spectroscopic properties

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