Enhanced Near-Infrared−Luminescence in an Erbium Tetrafluoroterephthalate Framework

Chen, Banglin; Yang, Yu; Zapata, Fátima; Qian, Guodong; Luo, Yongshi; Zhang, Jiahua; Lobkovsky, Emil

doi:10.1021/ic060568u

Cited by 235 publications

(132 citation statements)

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“…For instance, the spatial distribution of the lanthanide ions is perfectly controlled in coordination polymers, and compounds with as much as 50 wt.-% of lanthanide ions can be designed. However, although the number of reported luminescent lanthanide-containing coordination polymers is steadily increasing, [12] relatively few of them have been specifically designed for emission in the NIR [13][14][15] and quantitative data are scarce. [11] In order to evaluate the potential interest of Er-containing coordination polymers for optical applications, we present here a study of two Er III , hereafter referred as 2-Er].…”

Section: Introductionmentioning

confidence: 99%

Structural and Near‐IR Luminescent Properties of Erbium‐Containing Coordination Polymers

et al. 2009

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International audienceThe near-IR luminescence properties of two ErIII-containing coordination polymers, namely, [Er(btc)(H2O)5·3.5H2O] [(btc)3– = 1,3,5-benzenetricarboxylate] and [Er2(bdc)3- (H2O)4] [(bdc)2– = 1,4-benzenedicarboxylate] were investigated with the aim of testing their potential use as optical materials. Because both present relatively small quantum yields and short excited-state lifetimes, factors influencing their luminescent properties were deciphered in an effort to improve their luminescent properties. Thus, three other families of compounds were also investigated: (i) the two corre-sponding dehydrated compounds with respective chemical formula [Er(btc)] and [Er2(bdc)3] for evaluating the importance of O–H vibrators, (ii) the heterodinuclear compounds [Er2–2xY2x(bdc)3(H2O)4] (x = 0.2, 0.5, 0.8 and 0.9) for estimating the role of intermetallic quenching and (iii) the heterodinuclear compounds [Er2–2xYb2x(bdc)3(H2O)4] (x = 0.2 and 0.5) for checking whether YbIII-sensitized up-conversion can be induced or not. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009

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Section: Introductionmentioning

confidence: 99%

Structural and Near‐IR Luminescent Properties of Erbium‐Containing Coordination Polymers

et al. 2009

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“…The overall structure of (2) shows a 2-fold interpenetrated pcu topology, in which each net can be considered as the α-Po type where the centres of the binuclear lanthanide clusters are the nodes, and no accessible pore space is available. An erbium analogue of (2) has been previously reported by Chen et al, 35 although in the previous work the composition Er 2 ĲBDC) 3 ĲDMF) 2 ĲH 2 O) 2 ·H 2 O was found, i.e. with additional crystal water occluded within the structure.…”

Section: -19mentioning

confidence: 73%

Structural variety in ytterbium dicarboxylate frameworks and in situ study diffraction of their solvothermal crystallisation

et al. 2017

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aThe ytterbium 1,4-benzenedicarboxylate (BDC) framework [Yb 2 ĲBDC) 3 ĲDMF) 2 ]·H 2 O (1) crystallises from a N, N-dimethylformamide (DMF)-rich solution at 80-120°C. (1) is constructed from infinite chains of dicarboxylate-bridged seven-coordinate Yb atoms, cross-linked in two directions by BDC to yield diamond-shaped channels (sra topology) lined by coordinated DMF molecules and occluded water. Increasing the water content in the synthesis solution yields a material with more crystal water (2), in which the Yb centres are eight-coordinate and form dimers bridged by BDC to give two interpenetrating networks of pcu (α-Po) topology. Upon extended reaction in this water-rich solvent mixture, an alternative phase is formed: an anhydrous mixed BDC-formate, YbĲBDC)ĲHCO 2 ), (3), which has a pillared, layered structure, with formate produced by hydrolysis of the DMF. An isoreticular version of (2) can also be formed under similar conditions using 2,6-naphthalene-dicarboxylate (NDC) as linker: [Yb 2 ĲNDC) 3 ĲH 2 O) 4 ]·2DMF (4). Despite their different structures, (1) and (2) are calcined to a common porous, desolvated phase Yb 2 ĲBDC) 3 at 300°C. Using high energy X-rays at Diamond Light Source we are able to penetrate the solvothermal reaction vessels and to follow the formation of (1) and (2) in real time.This allows accurate crystallisation curves to be obtained from which qualitative kinetic information is extracted. Importantly, the high angular resolution of the in situ powder XRD patterns allows refinement of crystal structure: this permits the temporal evolution of unit cell parameters to be followed, which are ascribed to changes in coordinated solvent composition within the materials during their formation, while analysis of phase fraction allows kinetic parameters to be quantified using the nucleation-growth model of Gualtieri.

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“…Recent studies have shown the remarkable analogy of 1,4-BDC-type ligands with bulky methyl [4], fluorine [5], chlorine [6] or bromine [7] groups, since they not only provide astonishing thermal and chemical stability and stereo-chemical characteristics, but also prevent interpenetration phenomena of resultant polymeric networks. In the asymmetric unit, one Zn II ion lying on an inversion center [at (0 0 ½)] is coordinated by six oxygen atoms in anearly ideal octahedral configuration.…”

Section: Discussionmentioning

confidence: 99%

Crystal structure of catena-poly[bis(glycol-1 k²O,O')-(μ₂- tetrafluoroterephthalato)zinc(II)], Zn(C₈F₄O₄)(C₂H₆O₂)₂

He¹,

Xu²,

Lu³

et al. 2009

Zeitschrift Für Kristallographie - New Crystal Structures

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Source of materialBy placing aCH 3 OH solution (10 ml) of tetrafluoroterephthalic acid (tfbdc, 23.8 mg, 0.1 mmol) at the bottom of astraight glass tube and then carefully added abuffer of glycol (10 ml), above which aC H 3 OH solution (10 ml) containing ZnCl 2 (13.6 mg, 0.1 . mmol) was placed in this tube. The resulting slow diffusion of solvents across the boundary layer results in excellent colorless block-shaped crystals growing there over aperiod of two weeks. Experimental detailsHatoms bound to methylene carbon atoms were assigned to calculated positions with d(C-H) =0.97 Å and refined using ariding model, with U iso (H) =1 .2 U eq (C). Hydroxyl Ha toms were positioned geometrically with d(O-H) =0.84 Å and U iso (H) = 1.5 U eq(O). DiscussionThe design and synthesis of metal-organic frameworks constructed from transition metal ions and 1, In the asymmetric unit, one Zn II ion lying on an inversion center [at (0 0 ½)] is coordinated by six oxygen atoms in anearly ideal octahedral configuration. The Zn II ion is chelated by four Oatoms from two glycol molecules in the equatorial plane and two axial O atoms from two centrosymmetric tetrafluoroterephthalate (tfbdc) ligands. Because of the steric hindrance of the fluorine atoms located at the ortho positions of carboxylate, the rotation angle of tetrafluorined phenyl ring relative to carboxylate is 47.3(2)°, which is quite similar to that of arecent reported Mn-tfbdc polymer [8]. Each tfbdc anion bridges two Zn II centers in ab ismonodentate fashion to afford alinear chain along the [1 1 1]with adjacent Zn···Zn separation of 11.503(1) Å.Within the polymeric chain, one hydroxyl of the glycol molecule is involved in the strong intramolecular O4-H4···O2 i bond (i = -x,-y+2,-z+1)t o the uncoordinated O2 atom of tfbdc moiety. Moreover, intermolecular O3-H3···O1ii bonds (ii = x-1,y,z)connect adjoining chains into atwo-dimensional network.

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Enhanced Near-Infrared−Luminescence in an Erbium Tetrafluoroterephthalate Framework

Cited by 235 publications

References 13 publications

Structural and Near‐IR Luminescent Properties of Erbium‐Containing Coordination Polymers

Structural and Near‐IR Luminescent Properties of Erbium‐Containing Coordination Polymers

Structural variety in ytterbium dicarboxylate frameworks and in situ study diffraction of their solvothermal crystallisation

Crystal structure of catena-poly[bis(glycol-1 k²O,O')-(μ₂- tetrafluoroterephthalato)zinc(II)], Zn(C₈F₄O₄)(C₂H₆O₂)₂

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Enhanced Near-Infrared−Luminescence in an Erbium Tetrafluoroterephthalate Framework

Cited by 235 publications

References 13 publications

Structural and Near‐IR Luminescent Properties of Erbium‐Containing Coordination Polymers

Structural and Near‐IR Luminescent Properties of Erbium‐Containing Coordination Polymers

Structural variety in ytterbium dicarboxylate frameworks and in situ study diffraction of their solvothermal crystallisation

Crystal structure of catena-poly[bis(glycol-1 k2O,O')-(μ2- tetrafluoroterephthalato)zinc(II)], Zn(C8F4O4)(C2H6O2)2

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Crystal structure of catena-poly[bis(glycol-1 k²O,O')-(μ₂- tetrafluoroterephthalato)zinc(II)], Zn(C₈F₄O₄)(C₂H₆O₂)₂