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The new nonadentate tripodal ligand trenphen {tris[(1,10-phenanthroline-2-carboxamido)-ethyl]amine} has been synthesized by condensation of tren [tris(2-aminoethyl)amine] with an excess of 1,10-phenanthroline-2-carboxylic acyl chloride. The ligand trenphen and its lanthanide complexes (Sm, Nd, Eu, Tb, and Lu) have been structurally characterized by single-crystal X-ray diffractometry. Crystals of trenphen·H2O·CH3CN, 1, are monoclinic, space group P2(1)/n, a = 14.9923(8) A, b = 17.4451(10) A, c = 17.1880(10) A, beta = 114.8290(10), V = 4079.9(4) A3, Z = 4. The solid-state crystal structures of the isostructural [Ln(trenphen)](OTf)3·yH2O·xEt2O·zCH3CN (OTf = CF3SO3) (Ln = Nd, y = 0.5, x = 1, z = 3 (2); Ln = Sm, y = 0.5, x = 1, z = 3 (3); Ln = Eu, y = 0.5, z = 3 (4); Ln = Tb, y = 0.5, x = 1, z = 1.5 (5); Ln = Lu, y = 0.5, x = 1, z = 1.5 (6)) (trigonal, P-3, Z = 2) show that the covalent tripod trenphen undergoes a rearrangement in the presence of lanthanide ions yielding three tridentate binding units which encapsulate the nine-coordinated lanthanide ion with a slightly distorted, tricapped, trigonal prismatic coordination geometry. The correlation observed between the decrease of Ln-N distances and the metal ionic radius indicates that trenphen, although containing rigid bidentate phenanthroline units, is sufficiently flexible to self-organize without steric constraints around lanthanide ions of different size. Solution-state NMR studies show that complexes 2-6 exist in acetonitrile solution as discrete rigid C3-symmetric species retaining the triple-helical structure observed in the solid state. NMR and ES-MS titration show the formation of bimetallic and trimetallic species in the presence of an excess of metal, whereas mononuclear bistrenphen complexes are obtained in the presence of an excess of ligand.

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Reference：
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, Safety of Europium(III) trifluoromethanesulfonate, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 52093-25-1, Name is Europium(III) trifluoromethanesulfonate, molecular formula is C3EuF9O9S3. In a Article, authors is Bradberry, Samuel J.，once mentioned of 52093-25-1

Two lanthanide luminescent naphthyl-dipicolinic amide (dpa) methacrylate monomers for the synthesis of grafted supramolecular co-polymer gels (hydrogels), and their use as additional crosslinks in robust covalently cross-linked HEMA hydrogels is presented; the results demonstrate the importance of the ligand symmetry for the Eu(iii) emission from the hydrogels.

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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Chemistry is traditionally divided into organic and inorganic chemistry. HPLC of Formula: C3EuF9O9S3. The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 52093-25-1

Luminescent polymer latexes loaded with lanthanide complexes have been synthesized by miniemulsion polymerization. A self-assembled europium complex was embedded into poly(methyl methacrylate) nanoparticles without covalent linking and compared to a commercially-available neutral chelate. The nature of the surfactant was found to have a great impact on the incorporation process for the europium complex and only the latexes stabilized by a cationic surfactant exhibited a luminescence signal. A maximum doping level of about 2% in weight in the final monodispersed particles was obtained. The resulting polymeric luminescent nanoparticles showed good stability over leakage. The described synthetic method was used to incorporate multiple lanthanide complexes into latex nanoparticles affording multicolour nanolabels. Two series of polymeric latexes bearing codes are presented in this work.

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Reference：
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, Recommanded Product: 52093-25-1, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 52093-25-1, Name is Europium(III) trifluoromethanesulfonate, molecular formula is C3EuF9O9S3. In a Conference Paper, authors is Pietraszkiewicz, Marek，once mentioned of 52093-25-1

Novel ligands incorporating diphenylphosphinoxide groups form very stable and extremely luminescent complexes with Eu(III) and Tb(III) ions, when excited with UV radiation. Their luminescence is very stable in water media, indicating that water has no influence on vibronic OH quenching of the luminescence. Ligand 1, based on cyclotriphosphazene, contains six Ph2PO groups, whereas the ionisable compound 2 contains a bidentate model ligand (N-diphenylphosphinoxide-p-toluenesulphonamide). Both ligands form lanthanide complexes very poorly soluble in water. The complex luminescence characteristics were investigated in aqueous media, but due to their incomplete solubilisation only qualitative data were obtained.

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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels.In a patent， SDS of cas: 52093-25-1, Which mentioned a new discovery about 52093-25-1

Sol-gel derived Eu3+-doped materials based on a poly(oxyethylene)/siloxane hybrid host incorporating two coordinating functionalities (polymer ether- and cross-link carbonyl-type oxygen atoms) have been investigated by mid-infrared and Raman spectroscopies with the goal of elucidating the cation/polymer and cation/cross-link interactions and hydrogen bonding. The organic/inorganic matrix of these ormosils is composed of a siliceous backbone bonded through urethane groups to methyl end-capped polyether chains with approximately seven oxyethylene repeat units. This framework, called mono-urethanesil, has been doped with europium triflate, Eu(CF3SO3)3. Xerogels with salt composition n (where n is the molar ratio of OCH2CH2 moieties per Eu3+ion) ranging from ? to 5 have been analyzed. The results obtained indicate that in the mono-urethanesils with n ? 60 the Eu3+ ions coordinate solely to the urethane carbonyl oxygen atoms. The first evidences of the complexation of the polyether chains to the cations have been found at a salt concentration that corresponds to n = 40, that is considerably lower than the saturation level the carbonyl groups has attained (in theory at n = 7). At a higher salt content (n < 40), both types ofcation coordination are apparent. Because enzymes can increase reaction rates by enormous factors and tend to be very specific, SDS of cas: 52093-25-1, typically producing only a single product in quantitative yield, they are the focus of active research.you can also check out more blogs about 52093-25-1

Reference：
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, Formula: C3EuF9O9S3, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 52093-25-1, Name is Europium(III) trifluoromethanesulfonate, molecular formula is C3EuF9O9S3. In a Article, authors is Gunnlaugsson，once mentioned of 52093-25-1

The Eu(III) tetraazamacrocyclic complexes [Eu·1] and [Eu·2], and the Tb(III) and Yb(III) complexes [Tb·1] and [Yb·2], have been synthesized as luminescent molecular-level devices. The Eu complexes exhibit unique dual pH switching behavior in water under ambient conditions. The delayed Eu emission is reversibly switched on in acid, with an enhancement factor of several hundred for [Eu·1). These observations are consistent with the protonation of the quinoline aryl nitrogen moiety (pKa ? 5.9 for [Eu·1]). The fluorescence emission spectra of these complexes are unaffected by acid, but pronounced changes occur in alkaline solution due to the deprotonation of the aryl amide nitrogen (pKa ? 9.4 for [Eu·1]). [Tb·1] shows a more intriguing pH dependence; Tb emission is switched “on” only in the presence of H+ and in the absence of molecular oxygen, whereas the fluorescence emission properties are similar to those observed with [Eu·1). This behavior can be conveniently described as a molecular-level logic gate, corresponding to a two-input INHIBIT function, A lambda B?. The analogous [Yb·2] complex shows no such pH or O2 dependence.

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Reference：
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

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Lanthanides and group III metal triflates (especially La, Sm) accelerate the Baylis-Hillman reaction (reaction between an unsaturated ester and aldehyde catalysed by DABCO, for example) and further acceleration can be obtained upon addition of diol ligands such as binol.

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Reference：
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Electric Literature of 52093-25-1, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.52093-25-1, Name is Europium(III) trifluoromethanesulfonate, molecular formula is C3EuF9O9S3. In a Article，once mentioned of 52093-25-1

Circular dichroism spectroscopy has revealed that strong exciton coupling occurs between adjacent pairs of 1-naphthyl chromophores in the chiral sodium, calcium and europium complexes of the macrocyclic tetraamide L1a/b. In constitutionally isomeric complexes involving a 2-naphthyl linkage, L2a/b, intramolecular excimer formation is observed by fluorescence emission spectroscopy as being strongest in the protonated ligand itself. The terbium and europium complexes show a well-defined circularly polarised luminescence that is independent of the nature of excitation: UV excitation at 300 nm via the proximate naphthyl antennae in [Tb.L1a]3+ and [Tb.L1b]3+ followed by intramolecular energy transfer results in mirror-image circularly polarised emission spectra. The lanthanide complex serves to modulate both the frequency and polarisation of the incident light in a controlled manner.

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Reference：
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels.In a patent， category: catalyst-ligand, Which mentioned a new discovery about 52093-25-1

We have synthesized a dendrimer (1) consisting of a 1,4,8,11- tetraazacyclotetradecane (cyclam) core, appended with four benzyl substituents that carry, in the 3- and 5-positions, a dansyl amide derivative (of type 2), in which the amide hydrogen is replaced by a benzyl unit that carries an oligoethylene glycol chain in the 3- and 5-positions. All together, the dendrimer contains 16 potentially luminescent moieties (eight dansyl- and eight dimethoxybenzene-type units) and three distinct types of multivalent sites that, in principle, can be protonated or coordinated to metal ions (the cyclam nitrogen atoms, the amine moieties of the eight dansyl units, and the 16 oligoethylene glycol chains). We have studied the absorption and luminescence properties of 1, 2, and 3 in acetonitrile and the changes taking place upon titration with acid and a variety of divalent (Co2+, Ni2+, Cu2+, Zn2+), and trivalent (Nd3+, Eu 3+, Gd3+) metal ions as triflate and/or nitrate salts. The results obtained show that: 1) double protonation of the cyclam ring takes place before protonation of the dansyl units; 2) the oligoethylene glycol chains do not interfere with protonation of the cyclam core and the dansyl units in the ground state, but affect the luminescence of the protonated dansyl units; 3) the first equivalent of metal ion is coordinated by the cyclam core; 4) the interaction of the resulting cyclam complex with the appended dansyl units depends on the nature of the metal ion; 5) coordination of metal ions by the dansyl units follows at high metal-ion concentrations; 6) the effect of the metal ion depends on the nature of the counterion. This example demonstrates that dendrimers may exhibit complete functionality resulting from the integration of the specific properties of their component units.

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Reference：
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Electric Literature of 52093-25-1, A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 52093-25-1, Name is Europium(III) trifluoromethanesulfonate, molecular formula is C3EuF9O9S3. In a Article，once mentioned of 52093-25-1

Lanthanide-containing molecules have many potential applications in material science and biology, that is, luminescent sensing/labling, MRI, magnetic refrigeration, and catalysis among others. Coordination-directed self-assembly has shown great power in the designed construction of well-defined supramolecular systems. However, application of this strategy to the lanthanide edifices is challenging due to the complicated and greatly labile coordination numbers and geometries for lanthanides. Here we demonstrate a sensitive structural switching phenomenon during the stereocontrolled self-assembly of a group of Ln2nL3n (Ln for lanthanides, L for organic ligands, and n = 1, 2, 4) compounds. Systematic variation of the offset distances between the two chelating arms on the bis(tridentate) ligands dictated the final outcomes of the lanthanide assembly, ranging from Ln2L3 helicates and Ln4L6 tetrahedra to Ln8L12 cubes. Remarkably, the borderline case leading to the formation of a mixture of the helicate and the tetrahedron was clearly revealed. Moreover, the concentration-dependent self-assembly of an unprecedented cubic Ln8L12 complex was also confirmed. The luminescent lanthanide cubes can serve as excellent turn-off sensors in explosives detection, featuring high selectivity and sensitivity toward picric acid. All complexes were confirmed by NMR, ESI-TOF-MS, and single crystal X-ray diffraction studies. Our results provide valuable design principles for the coordination self-assembly of multinuclear functional lanthanide architectures.

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Reference：
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI