Structures and luminescent properties of lanthanide phosphonates

Mao, Jiang‐Gao

doi:10.1016/j.ccr.2007.02.008

Cited by 361 publications

(193 citation statements)

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“…2 However, in the field of metal phosphonates, isoreticular synthesis is rarely observed 3 due to its variable coordination modes which largely depend on the pH value, temperature, template, metal/ligand molar ratio, and so on. 4 As one type of inorganic-organic hybrid material, it is important to predict the structures and understand the structure-property relationship of metal phosphonates so that materials with specific structures and properties can be designed and prepared. To fabricate new metal phosphonates with novel structures and properties, auxiliary second ligands such as 2,2′-bipy, 4,4′-bipy, 1,10-phen and oxalic acid have usually been added and proved to be an effective strategy.…”

Section: Introductionmentioning

confidence: 99%

Tuning the structure of metal phosphonates using uncoordinating methyl group: syntheses, structures and properties of a series of metal diphosphonates

Tang

et al. 2014

CrystEngComm

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), have been synthesized hydrothermally from 2,5-dimethyl-1,4-phenylenediphosphonic acid (H 4 L) and thoroughly characterized using EA, IR, TGA, powder and single-crystal XRD, luminescence and magnetism methods. The single-crystal X-ray diffraction measurements indicate that the diphosphonate ligands adopt three kinds of coordination modes which have a huge influence on the structure formation. Compounds 1 and 8 are isostructural and feature 3D framework structures which are constructed by the connectivity of MO 6 (M = Mn and Cd) octahedrons and tetradentate organic linkers. Compounds 2 and 4, 3 and 6 are also isostructural, but have isolated mononuclear structures. Compound 5 exhibits 2D layered structure, in which fourconnected copper(II) centers are bridged by tetradentate diphosphonate ligands. Compound 7 has a 1D infinite chain structure which is constructed from ZnO 4 tetrahedrons and bidentate bridging diphosphonate ligands. It is also found that compounds 6-8 display interesting luminescent properties, whereas 1 shows an antiferromagnetic property.

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Section: Introductionmentioning

confidence: 99%

Tuning the structure of metal phosphonates using uncoordinating methyl group: syntheses, structures and properties of a series of metal diphosphonates

Tang

et al. 2014

CrystEngComm

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“…The first lanthanide aminophosphonate, Lu(HO3PCH2CH2NH3)3(ClO4)3·3D2O was reported by Legendziwicz et al in 1999 [40,41]. Due to 4f-phosphonate low solubility in water and other organic solvents as well as their poor crystallinity, it is still a difficult task to obtain single crystals suitable for X-ray structural analysis [12,13].…”

Section: Introductionmentioning

confidence: 99%

“…Due to 4f-phosphonate low solubility in water and other organic solvents as well as their poor crystallinity, it is still a difficult task to obtain single crystals suitable for X-ray structural analysis [12,13]. These problems can be solved by two methods: (1) introducing polar functional groups into the ligand, such as hydroxy, amino, carboxylate, or crown ether [42][43][44][45]; and (2) introducing a second ligand such as pivalic acid or oxalic acid [41,42]. The introduction of the second ligand is to improve the crystallization of the products, to mediate the electronic effects between paramagnetic metal centers and to link the metal centers into various structures with dimensionalities extending from zero to three [46][47][48].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Crystal Structures, and Magnetic Properties of Lanthanide (III) Amino-Phosphonate Complexes

Zangana

2018

Magnetochemistry

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Both compounds have been characterized with elemental analysis, single-crystal X-ray diffraction methods, and magnetic measurements. The molecular structure of compounds 1 and 2 reveal two highly unsymmetrical complexes comprising ten lanthanide metal centers, where the lanthanide metal ion centers in the cages are linked through pivalate units and further interconnected by CPO 3 tetrahedra to build the crystal structure. The magnetic behavior of 1 and 2 was investigated between ambient temperature and ca. 2 K, the magnetic measurements for compound 1 suggests antiferromagnetic interactions between the Gd(III) metal ion centers at low temperatures. The large number of isotropic Gd(III) ions comprising 1 makes it a candidate for magnetocaloric applications, thus the magnetocaloric properties of this molecular cage were investigated indirectly through isothermal magnetisation curves. The magnetic entropy change was found to be 34.5 J kg −1 K −1 , making 1 a plausible candidate in magnetic cooling applications.

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“…In a typical sensitization process, the ligand is excited through high absorptivity π-π* transition, which then transfers energy to the Ln (III) ion, populating the Lncentered excited state, thus giving the lanthanide emission [5]. This so called "antenna effect" has been well documented for lanthanide complexes based on β-diketonates, polyazine ligands, microcycle polyamines and aromatic carboxylate ligands [6][7][8][9][10][11][12][13][14][15][16][17][18]. Our research group has also reported some luminescent lanthanide complexes constructed from phosphonate, sulfonate, oxalate and carboxylate ligands in recent years [19][20][21].…”

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confidence: 99%

Syntheses, structure and photoluminescent properties of lanthanide oxalatosulfocarboxylate coordination polymers

Zhi-xi

Zeng

2012

Chin. Sci. Bull.

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Hydrothermal reactions of oxalic acid (H 2 ox) and 2-sulfobenzoic acid (H 2 L) with lanthanide oxide or hydroxide yielded five lanthanide oxalatosulfocarboxylates. They have a general formula [Ln 2 L 2 (ox)(H 2 O) 6 ] n [Ln = La (1), Nd (2), Eu (3), Gd (4), Tb (5)]. Their structures were characterized by single crystal X-ray diffraction, powder X-ray diffraction (PXRD), infrared (IR) spectroscopy, elemental analysis (EA), and thermogravimetric analysis (TGA). 1-5 are isostructural coordination polymers and feature one-dimensional (1D) chains, which are extended into 3D supramolecular frameworks through inter-chain hydrogen bonds between coordinated H 2 O donors and oxygen acceptors from carboxylate, sulfonate and oxalate groups. In addition, the solid-state photoluminescence properties of the Nd (2), Eu (3) and Tb (5) derivatives have been measured at room temperature. The Eu and Tb-containing coordination polymers (CPs) exhibit intense red and green luminescence emissions, respectively, with lifetimes in the order of millisecond.lanthanide oxalate, lanthanide sulfonate, photoluminescence, coordination polymer Citation:Li X F, Gao Z X, Zeng Q H. Syntheses, structure and photoluminescent properties of lanthanide oxalatosulfocarboxylate coordination polymers. Chin

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Structures and luminescent properties of lanthanide phosphonates

Cited by 361 publications

References 64 publications

Tuning the structure of metal phosphonates using uncoordinating methyl group: syntheses, structures and properties of a series of metal diphosphonates

Tuning the structure of metal phosphonates using uncoordinating methyl group: syntheses, structures and properties of a series of metal diphosphonates

Synthesis, Crystal Structures, and Magnetic Properties of Lanthanide (III) Amino-Phosphonate Complexes

Syntheses, structure and photoluminescent properties of lanthanide oxalatosulfocarboxylate coordination polymers

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