Carboxylates of rare earth elements

Janicki, Rafał; Mondry, Anna; Starynowicz, Przemysław

doi:10.1016/j.ccr.2016.12.001

Cited by 98 publications

(67 citation statements)

References 633 publications

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“…The synthetic procedure of the Ln 3+ aliphatic α,ω,‐alkanedicarboxylate complexes reported in the literature have been obtained predominantly by the hydrothermal method, while there are a few works reporting on the precipitation method . In the present work, some modifications in the precipitation method were performed, such as the Ln 3+ solutions addition to a heated solution at ∼80 °C of the previously deprotonated ligand (pH ∼7) in order to increase the solubility of the ligands in water (yields 90 %).…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…The aliphatic α,ω,–alkanedicarboxylate anions ( − OOC−(CH 2 ) n‐2 −COO − , 2≤n≤12) (Figure ) have very interesting features such as their versatile coordination modes, for example monodentate, chelated bidentate, bridging or mixed modes . The coordination modes can lead to different multidimensional structures depending mostly on the length and flexibility of the chain . In addition, there are other intrinsic physico‐chemical properties of the α,ω,‐alkanedicarboxylic acids due to the odd‐even effect, which is quite well established in the literature .…”

Section: Introductionmentioning

confidence: 99%

“…[1] The coordination modes can lead to different multidimensional structures depending mostly on the length and flexibility of the chain. [1,2] In addition, there are other intrinsic physico-chemical properties of the α,ω,-alkanedicarboxylic acids due to the oddeven effect, which is quite well established in the literature. [3][4][5] This effect plays an important role in the regular variations of different properties of compounds: melting points, [3,5,6] solubility, [3] nanocalorimetry, [7] electrochemical, [8,9] the emulsifying ability of some surfactants [9] or structural selfassembling.…”

Section: Introductionmentioning

confidence: 99%

“…It is noteworthy that the analogs La 3 + and Gd 3 + complexes were prepared with the objective of obtaining information on O 2À (2p)!Eu 3 + (4 f) Ligand-to-Metal Charge Transfer (LMCT) states and triplet states (T 1 ) of the dicarboxylate ligands, respectively. The synthetic procedure of the Ln 3 + aliphatic α,ω,-alkanedicarboxylate complexes reported in the literature have been obtained predominantly by the hydrothermal method, [1,32,33] while there are a few works reporting on the precipitation method. [34] In the present work, some modifications in the precipitation method were performed, such as the Ln 3 + solutions addition to a heated solution at~80°C of the previously deprotonated ligand (pH~7) in order to increase the solubility of the ligands in water (yields 90 %).…”

Section: Introductionmentioning

confidence: 99%

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Odd‐Even Effect on Luminescence Properties of Europium Aliphatic Dicarboxylate Complexes

et al. 2019

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The odd–even effect in luminescent [Eu2(L)3(H2O)x]⋅y(H2O) complexes with aliphatic dicarboxylate ligands (L: OXA, MAL, SUC, GLU, ADP, PIM, SUB, AZL, SEB, UND, and DOD, where x=2–6 and y=0–4), prepared by the precipitation method, was observed for the first time in lanthanide compounds. The final dehydration temperatures of the Eu3+ complexes show a zigzag pattern as a function of the carbon chain length of the dicarboxylate ligands, leading to the so‐called odd‐even effect. The FTIR data confirm the ligand–metal coordination via the mixed mode of bridge–chelate coordination, except for the Eu3+‐oxalate complex. XRD results indicate that the highly crystalline materials belong to the monoclinic system. The odd–even effect on the 4 f–4 f luminescence intensity parameters (Ω2 and Ω4) is explained by using an extension of the dynamic coupling mechanism, herein named the ghost‐atom model. In this method, the long‐range polarizabilities (α* ) were simulated by a ghost atom located at the middle of each ligand chain. The values of α* were estimated using the localized molecular orbital approach. The emission intrinsic quantum yield (QnormalLnormalnnormalLnormaln ) of the Eu3+ complexes also presented an the odd‐even effect, successfully explained in terms of the zigzag behavior shown by the Ω2 and Ω4 intensity parameters. Luminescence quenching due to water molecules in the first coordination sphere is also discussed and rationalized.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Odd‐Even Effect on Luminescence Properties of Europium Aliphatic Dicarboxylate Complexes

et al. 2019

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A Metal‐Organic Framework Incorporating Eight Different Size Rare‐Earth Metal Elements: Toward Multifunctionality À La Carte

Light

et al. 2023

Adv Funct Materials

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Multi‐metallic multivariate (MTV) rare earth (RE) metal−organic frameworks (MOFs) are of interest for the development of multifunctional materials, however examples with more than three RE cations are rare and obstructed by compositional segregation during synthesis. Herein, this work demonstrates the synthesis of a multi‐metallic MTV RE MOF incorporating two, four, six, or eight different RE ions with different sizes and in nearly equimolar amounts and no compositional segregation. The MOFs are formed by a combination of RE cations (La, Ce, Eu, Gd, Tb, Dy, Y, and Yb) and a 1,7‐di(4‐carboxyphenyl)‐1,7‐dicarba‐closo‐dodecaborane (mCB‐L) linker. The steric bulkiness and acidity of mCB‐L is crucial for the incorporation of different size RE ions into the MOF structure. Demonstration of the incorporation of all RE cations is performed via compositional and structural characterization. The more complex MTV MOF, including all eight RE ions (mCB‐8RE), are also characterized using optical, thermal, and magnetic techniques. Element‐selective X‐ray absorption spectroscopy and X‐ray Magnetic Circular Dichroism measurements allow us to characterize spectroscopically each of the eight RE ions and determine their magnetic moments. This work paves the way for the investigation of MTV MOFs with the possibility to combine RE ions à la carte for diverse applications.

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A Six‐Armed Phenhomazine Ligand with a Potential “Turn‐Off” Copper(II) Sensing Capability through Terbium(III) Luminescence Quenching

Trupp

Bruttomesso

Eliseeva

et al. 2020

Chemistry A European J

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Herein, the design, synthesis, and characterization of ap henhomazine ligand are described. The ligand has six pendant acetate arms designed for the combined coordination of copper(II) and lanthanide(III) ions, with the perspective of developing a" turn-off"c oppers ensor. The key step for the ligand preparation was the one-step endomethylene bridge fission of ad iamino Trçger's base with ac oncomitant alkylation. Fluorescence anda bsorption spectroscopies as well as nuclearm agnetic resonance (NMR) experiments were performed to analyzea nd understand the coordination properties of the ligand. Transitionm etal coordination was drivenb yt he synergistic effect of the free nitrogen atoms of the diazocinic core and the two central acetate arms attachedt ot hose nitrogen atoms, whereas lanthanide coordinationi sp erformed by the external acetate arms, presumably forming as elf-assembled 2:2m etallosupramolecular structure. The terbiumc omplex shows the typical green emissionw ith narrowb ands andl ong luminescence lifetimes.T he luminescence quenching produced by the presence of copper(II) ions was analyzed.T his work sets, therefore, as tartingp oint fort he development of ap henhomazine-based "turn-off" copper(II) sensor.

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Carboxylates of rare earth elements

Cited by 98 publications

References 633 publications

Odd‐Even Effect on Luminescence Properties of Europium Aliphatic Dicarboxylate Complexes

Odd‐Even Effect on Luminescence Properties of Europium Aliphatic Dicarboxylate Complexes

A Metal‐Organic Framework Incorporating Eight Different Size Rare‐Earth Metal Elements: Toward Multifunctionality À La Carte

A Six‐Armed Phenhomazine Ligand with a Potential “Turn‐Off” Copper(II) Sensing Capability through Terbium(III) Luminescence Quenching

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