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Carpentier, J.-F. Rare-Earth Complexes Supported by Tripodal Tetradentate Bis(phenolate) Ligands: A Privileged Class of Catalysts for Ring-Opening Polymerization of Cyclic Esters. Organometallics 2015, 34, 4175–4189. [Google Scholar] Lyubov, D.M.; Tolpygin, A.O.; Trifonov, A.A. Rare-earth metal complexes as catalysts for ring-opening ...
Abstract and Figures. Crystals and fibers doped with rare-earth (RE) ions provide the basis for most of today's solid-state optical systems, from lasers and telecom devices to emerging potential ...
Luminescent rare earth complexes have attracted considerable attentions owing to their excellent luminescence characteristics, i.e., high luminous intensity, long luminous lifetime and extremely sharp emission bands (good color purity) from the electronic transitions between the 4f energy levels.
Nanofibers coated with Rare-Earth complexes. Crystals and fibers doped with Rare Earth (RE) ions provide the basis to most of today's solid-state optical systems, from lasers and telecom devices to emerging potential quantum applications such as quantum memories and optical to microwave conversion. The two platforms, doped …
La, Nd, Pr, Ce, Eu and Sm complexes with curcumin have been prepared by the reaction of rare earth nitrate with curcumin in alcohol solution. Six complexes have been characterized by FT-IR, 1 H NMR, ICP-MS and TG. The results reveal that the structure of complexes is binary complexes, and then the complexes are marked as …
INTRODUCTION. The unique properties of rare-earth (RE) complexes including ligand-sensitized energy transfer, fingerprint-like emissions and long-lived emissions [], make them promising materials for many applications such as LED devices [4, 5], optical encoding [6, 7], luminescence imaging/detection [] and time-resolved …
Rare earth complexes are widely studied as luminescent materials in many fields because of their rich orbital energy levels and unique luminescent properties [ 1, 2 ], such as organic light emitting …
The fruitful reduction chemistry allowed: (1) the discovery of a new aromatic C-H and C-F bond activation mechanism for rare-earths; (2) the synthesis of the first scandium naphthalene complex and a reactivity study on P 4 activation by rare-earth arene complexes; (3) the isolation and characterization of a 6C, 10π-electron aromatic system ...
The potential use as anticancer agents of the rare-earth metal complexes could be further explored in future studies by obtaining ternary complexes with oxolinic acid and various ligands suitable for DNA intercalation. This would be an opportunity to explore ways of altering the DNA-interaction mechanism, with the aim of improving their ...
Recently, d–f transition rare earth complexes have been reported as new emitters in OLEDs with potential high efficiency and stability. In this Perspective, we present a brief introduction to OLEDs …
The majority of rare earth complexes that activate dinitrogen (N 2) result in its formal reduction to the N 2 2− anion and the formation of bimetallic complexes of the general form [A 2 (thf) x Ln] 2 (μ-η 2:η 2-N 2) where there is side-on binding of N 2 ("A is defined as a group that exists as an anion in LnA 3 and provides reductive ...
Rare earth complexes are widely studied as luminescent materials in many fields because of their rich orbital energy levels and unique luminescent properties [1,2], such as organic light emitting diodes (OLEDs) [3,4,5,6,7], bio-imaging [8,9,10,11,12], light conversion and anti-counterfeiting [12,13]. The luminescence mechanism of rare earth ...
This account article describes the structural variety of and synthetic routes toward trivalent rare-earth complexes incorporating such {ONXO R1,R2} ancillaries along with reactive amido, alkyl, alkoxide, amidinate, guanidinate, halide, and borohydride groups. The chemistry of related divalent rare-earth complexes is also included.
Dichloro complexes 2Y and 2Lu turned out to be unstable in aromatic solvents. The ligand symmetrization reaction in the case of 2Y affords the yttrium complex coordinated by dianionic [(2,6- i Pr 2 C 6 H 3 )NC( CH 2 )C( CH 2 )N(C 6 H 3 -2,6- i Pr 2 )] 2− ligand, (2,6- i Pr 2 C 6 H 3 )N C(Me)C(Me) N(C 6 H 3 -2,6- i Pr 2 ) and YCl 3 .
The molecular structures of 1, 5, 6, and 7 have been studied through single-crystal X-ray diffraction showing mononuclear neutral complexes with the rare-earth ion …
The coordination ability of N-ligands towards rare earth cations is weaker than that of O-ligands, making it difficult to produce rare earth complexes bound by N in aqueous solution. However, rare earth complexes with N-ligands can be prepared in appropriate non-aqueous polar solvents, and the coordination number can be as high as …
Two different synthetic approaches are successfully used for the preparation of bis (alkyl) rare-earth complexes. The first one is the alkane elimination reaction of tris (alkyl) rare-earth species LnR 3 with one equivalent of the protio form of the ligand LH. The second one is based on the alkylation reactions of dihalo complexes LLnX 2 (X ...
Rare earth elements (REE), essential metals for the transition to a zero-emission economy, are mostly extracted from REE-fluorcarbonate minerals in deposits …
Benefiting from the sharp emission and theoretical internal quantum efficiency, rare earth luminescent complexes have been intensively explored over the …
Anilido-imine ligands o-C6H4(NHAr1)(CH=NAr2), in which Ar1 is 2,6-diisopropylbenzyl group and Ar2 contains fluorine (HL1) or methoxyl (HL2) group on ortho-position of phenyl substituent, were synthesized for constructing rare-earth metals based complexes of 1a–1c (HL1 based Sc, Lu, Y) and 2a–2c (HL2 based Sc, Lu, Y). Based on …
AGPs were then colocalized and physically associated with the μ subunit of the intracellular adaptor protein 2 (AP2) complexes. The AGP-AP2 interaction was independent of CME, whereas AGP's internalization required CME and AP2. Moreover, we show that AGP-dependent endocytosis in the presence of La (III) also occurred in human …
Rare earth europium(II) complexes based on d-f transition luminescence have characteristics of broad emission spectra, tunable emission colors and short excited state lifetimes, showing great potential in display, lighting and other fields.
Rare earth carboxylates constitute the largest class of rare earth-based coordination polymers,[1] showcasing diverse struc-tural types and coordination modes.[2–5] These complexes are known for their high coordination numbers, achieved through the favourable large size and high charge of lanthanoid ions,
The small-size rare-earth-metal-based complexes 1–4 upon activation with Al i Bu 3 and [Ph 3 C][B(C 6 F 5) 4] showed high 3,4-selectivities up to 98.1% for isoprene polymerization.
Rare-earth metal complexes with redox-active formazanate ligands D. Jin, X. Sun, A. Hinz and P. W. Roesky, Dalton Trans., 2022, 51, 5218 DOI: 10.1039/D2DT00456A This article is licensed under a …
Over the last ten years, strategies using rare-earth complexes as either redox-active centers or as redox-neutral Lewis acids have emerged. This review provides an overview of the recent accomplishments made in this field. It especially aims to demonstrate the utility of rare-earth complexes for ensuring photocatalytic …
Due to unique photo-physical characteristics, rare earth (RE) complexes play important roles in many fields, for example, telecommunications, life science, and organic light-emitting diodes...
1 Introduction. Rare earth carboxylates constitute the largest class of rare earth-based coordination polymers, 1 showcasing diverse structural types and coordination modes. 2-5 These complexes are known for their high coordination numbers, achieved through the favourable large size and high charge of lanthanoid ions, the multiplicity of …
We present a set of donor radii for the rare-earth cations obtained from the analysis of structural data available in the Cambridge Structural Database (CSD). Theoretical calculations using density functional theory (DFT) and wave function approaches (NEVPT2) demonstrate that the Ln-donor distances can be broken down into contributions of the …
Crystals and fibers doped with rare-earth (RE) ions provide the basis for most of today's solid-state optical systems, from lasers and telecom devices to emerging potential quantum applications such as quantum memories and optical to microwave conversion. The two platforms, doped crystals and doped fibers, seem mutually exclusive, each having its …
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