Mixed chelating ligands used to regulate the luminescence of Ln(<scp>iii</scp>) complexes and single-ion magnet behavior in Dy-based analogues

Wang, Hai‐Ling; Ma, Xiongfeng; Zou, Hua‐Hong; Wang, Kai; Li, Bo; Chen, Zilu; Liang, Fu‐Pei

doi:10.1039/c8dt03133a

Cited by 31 publications

(35 citation statements)

References 38 publications

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“…Four and five‐coordinate Er III SMMs are known in the literature, but none of these contains alkoxides or aryloxides [116, 117, 121] . Among higher‐coordinate (CN>5) mononuclear Er III alkoxide and aryloxide SMMs, none show improved SMM behaviour over the Er III COT family or Dy III derivatives of higher‐coordinate alkoxide and aryloxide SMMs [78, 79, 81, 85, 89, 122–125] …”

Section: Other Ln Alkoxide and Aryloxide Smmsmentioning

confidence: 99%

Mononuclear Dysprosium Alkoxide and Aryloxide Single‐Molecule Magnets

Parmar

Mills

Winpenny

2021

Chemistry A European J

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Recent studies have shown that mononuclear lanthanide (Ln) complexes can be high‐performing single‐molecule magnets (SMMs). Recently, there has been an influx of mononuclear Ln alkoxide and aryloxide SMMs, which have provided the necessary geometrical control to improve SMM properties and to allow the intricate relaxation dynamics of Ln SMMs to be studied in detail. Here non‐aqueous Ln alkoxide and aryloxide chemistry applied to the synthesis of low‐coordinate mononuclear Ln SMMs are reviewed. The focus is on mononuclear DyIII alkoxide and aryloxide SMMs with coordination numbers up to eight, covering synthesis, solid‐state structures and magnetic attributes. Brief overviews are also provided of mononuclear TbIII, HoIII, ErIII and YbIII alkoxide and aryloxide SMMs.

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Section: Other Ln Alkoxide and Aryloxide Smmsmentioning

confidence: 99%

Mononuclear Dysprosium Alkoxide and Aryloxide Single‐Molecule Magnets

Parmar

Mills

Winpenny

2021

Chemistry A European J

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“…Aromatic N-donors ligands such as 1,10-phenanthroline (hereafter symbolized as phen) are known for being efficient sensitizers of lanthanides ions because they absorb and A c c e p t e d m a n u s c r i p t efficiently transfer energy to the Ln 3+ excited states. [22] A number of [Ln(phen)2(NO3) 3] complexes have been reported to date with Ln = Y, [23] La, [24][25] Ce, [26] Pr, [27] Nd, [27] Sm, [27] Eu, [27][28][29][30][31][32] Gd, [28] Tb, [30,33] Dy, [22,27,34] Ho, [35] Er, [36] Yb, [25,37] and Lu [38] but their luminescent properties have not been studied in details except for the dysprosium-based complex. [22] Hereafter, we report the synthesis, crystal structure and luminescence study of a series of homo-lanthanide complexes with general chemical formula [Ln(phen)…”

Section: Introductionmentioning

confidence: 99%

Luminescence properties of lanthanide complexes-based molecular alloys

Maouche

Belaïd

Benmerad

et al. 2020

Inorganica Chimica Acta

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Six lanthanides complexes with chemical formula [Ln(phen)2(NO3)3] (Ln = Sm(1), Tb (2), Nd (3), Eu (4), Ho (5) and Y (6), phen = 1,10-phenanthroline) were synthesized. 1 and 2 were obtained as single crystals by slow diffusion. Structural characterization was based on single crystal X-ray diffraction and IR and 89 Y-NMR spectroscopies. NMR spectroscopic measurements were performed on [Y(phen)2(NO3)3] (6) and [Y0.75Lu0.25(phen)2(NO3)3] (7). Compounds obtained as microcrystalline powders were characterized by powder X-ray diffraction. The complexes crystallize in the monoclinic system, space group P21/n. Each Ln(III) ion is surrounded by four N atoms from two bidentate phenanthroline ligands and six O atoms from three chelating nitrate groups. The phenanthroline ligand provides efficient sensitization of the complexes that exhibit sizeable luminescence under UV irradiation. Thermal properties have been studied. They confirm the absence of water molecules in the crystal structure. The complexes are thermally stable up to 290 °C. Microcrystalline powders of hetero-lanthanide complexes, with global chemical formula [Tb1-xEux(phen)2(NO3)3] (series 8) and [Tb1-xGdx(phen)2(NO3)3] (series 9) were synthesized. Their photo-physical properties have been investigated. They demonstrate that luminescent molecular alloys can be obtained from lanthanides complexes and not only from hetero-nuclear coordination polymers as previously reported.

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“…To study in detail the magnetic properties of the title complexes, their magnetic susceptibilities were collected under a direct current (dc) magnetic field of 1000 Oe in a temperature range of 2 to 300 K, which are drawn into χ M T and χ M versus T plots as shown in Figure 3. The χ M T values (14.75 cm 3 K mol À 1 ) of complex 1 at 300 K is slightly higher than that (14.17 cm 3 K mol À 1 ) expected for one isolated Dy(III) ion in 6 H 15/2 multiplet ground state, [39,42] which is often seen for Dy(III) complexes. [43][44][45][46] It suggests that the Co(III) ion in 1 is in a low spin state.…”

Section: Magnetic Propertiesmentioning

confidence: 62%

Structure and Magnetic Properties of Two Discrete 3d‐4f Heterometallic Complexes

Yang

Quan

et al. 2020

ChemistrySelect

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Two discrete 3d–4f heterometallic complexes [CoIIIDyIII(CH3CN)0.5(L1)3(NO3)3] (1) and [Ni2IIDyIII(EtOH)(L2)4(NO3)2Cl] ⋅ CH3CN (2) were obtained from the reactions of 8‐hydroxyquinoline (HL1) or 2‐methyl‐8‐hydroxyquinoline (HL2) with their corresponding metal salts. Complex 1 presents a dinuclear structure with the Dy(III) and Co(II) ions linked by three phenolic oxygen atoms from three (L1)− ligands. Complex 2 presents a triangular trinuclear structure with the two Ni(II) ions and one Dy(III) ion consolidated by one chloride ligand and four phenolic oxygen atoms from four (L2)− ligands. Their χMT versus T plots show different profiles with obvious ferromagnetic interactions between the metal ions in 2. Both complexes exhibit slow magnetic relaxation behaviours, but with obvious different features. It revealed a cooperatively regulating effect of ligand and transition metal ions on the structures and magnetic properties.

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Mixed chelating ligands used to regulate the luminescence of Ln(iii) complexes and single-ion magnet behavior in Dy-based analogues

Cited by 31 publications

References 38 publications

Mononuclear Dysprosium Alkoxide and Aryloxide Single‐Molecule Magnets

Mononuclear Dysprosium Alkoxide and Aryloxide Single‐Molecule Magnets

Luminescence properties of lanthanide complexes-based molecular alloys

Structure and Magnetic Properties of Two Discrete 3d‐4f Heterometallic Complexes

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