C–H activation

Li, Jie Jack

doi:10.1007/978-3-319-03979-4_54

Cited by 24 publications

(35 citation statements)

References 8 publications

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“…This parameter expresses how well the radiative processes (k rad ) compete with the nonradiative (k nrad ) ones, particularly in lanthanide systems. [41] These two pathways are essentially involved in the depopulation of the 5 D 0 state, as expressed in Section S9 [Equations (2)(3)(4)(5)(6)]. The complete SSPL parameters for Eu-msucc are summarized in Section S10.…”

Section: Sspl (Solid-state Photoluminescence) Propertiesmentioning

confidence: 99%

“…Metal-organic framework (MOF) materials have been the focus of a mature field, with intense development, due to their potential applications in catalysis, [1] ion exchange, and gas separation. [2] Moreover, the possibility of employing a diversity of building blocks allows synthetic chemists to exploit specific, and even tunable, properties. In this context, lanthanide ions are of special interest in photonics and magnetism, because of their unique properties, which include characteristic narrow 4f-4f transitions (except La 3+ and Lu 3+ ), a wide range of lifetime values, and high quantum yields (QYs).…”

Section: Introductionmentioning

confidence: 99%

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Flexible Ligand‐Based Lanthanide Three‐Dimensional Metal–Organic Frameworks with Tunable Solid‐State Photoluminescence and OH‐Solvent‐Sensing Properties

et al. 2017

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Luminescent 3D metal–organic frameworks (MOFs) constructed from trivalent lanthanides Nd3+, Sm3+, Eu3+, Gd3+, Tb3+ and a flexible ligand, 2‐methylsuccinate, (Ln‐msucc) have been hydrothermally obtained as polycrystalline solids. They were fully characterized by X‐ray powder diffraction, thermal analysis, vibrational spectroscopy, and scanning electron microscopy. The crystalline structure and topological features were elucidated and compared with those of related Ln‐MOFs. The magnetic studies reveal that Nd‐msucc and Gd‐msucc present antiferromagnetic and ferromagnetic behavior, respectively. Moreover, the solid‐state photoluminescence properties of all the compounds were fully explored. Depending on the lanthanide content, these materials exhibited luminescence in the near‐infrared and visible regions. In particular, the photophysical behavior of the Eu phase was exhaustively examined and the radiative and nonradiative constants and intrinsic quantum yields were calculated. The hypersensitive nature of the Eu3+ 5D0→7F2 transition allowed an in‐depth study of the optical response in the presence of various protic and aprotic solvents. As far as we know, the chemical‐sensing studies employing Eu‐msucc constitute the first case reported for a lanthanide succinate‐derived framework. The obtained results are promising for the elaboration of specific chemical sensors based on this material.

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Section: Sspl (Solid-state Photoluminescence) Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Flexible Ligand‐Based Lanthanide Three‐Dimensional Metal–Organic Frameworks with Tunable Solid‐State Photoluminescence and OH‐Solvent‐Sensing Properties

et al. 2017

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“…[1][2][3][4] This versatility is enhanced in polycarboxylate species where multiple groups can be attached to frameworks varying from highly flexible polymethylene chains to extremely rigid polycyclic and aromatic entities, sometimes endowed with additional functionality, including chirality, and this has led to their widespread exploitation in the synthesis of coordination polymers and metal-organic frameworks. [5][6][7][8][9][10] As an example of a source of a tricarboxylate system of high symmetry, Kemp's triacid, cis,cis-1,3,5-trimethyl-1,3,5-cyclohexanetricarboxylic acid (H 3 kta) has been used to prepare a number of crystalline coordination complexes which have been characterized by crystal structure determinations. [11][12][13][14][15][16][17][18] Interestingly, this number (23) is smaller than that (26) of structure determinations on just complexes of dicarboxylate ligands obtained by reactions of diamines with axially oriented carboxylic groups of Kemp (4).…”

Section: Introductionmentioning

confidence: 99%

Dipodal, Tripodal, and Discoidal Coordination Modes of Kemp's Triacid Anions

Harrowfield

Thuéry

2020

Eur J Inorg Chem

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In order to probe the conformational preferences of the anions of Kemp's triacid (cis,cis‐1,3,5‐trimethyl‐1,3,5‐cyclohexanetricarboxylic acid, H3kta) in their metal ion complexes, and their influence on the structures thereof, six complexes with widely different metal cations (alkali, alkaline‐earth, 3d‐block and actinide) were synthesized and crystallographically characterized. All these complexes crystallize as diperiodic assemblies, but with three different conformations of the kta3–/Hkta2–/H3kta ligands. Only the tripodal form, with the cyclohexyl ring in chair conformation and the three carboxylic/ate groups axial is found in [Na5(kta)(Hkta)(H2O)] (1), [Sr3(H3kta)(kta)2] (2), [Mn3(kta)2(H2O)3] (3), and [Mn(H2O)6][Mn5(kta)4(H2O)4] (4). Particularly notable are hexanuclear ring subunits formed around two ligands in 2. The tripodal form coexists with the discoidal one, with the ring in the chair conformation and the three carboxylate groups equatorial, in [Mn6(kta)4(nmp)3] (5), with nmp = N‐methyl‐2‐pyrrolidone, which displays hexanuclear ring subunits. Finally, the so‐called dipodal form, with the ring in boat conformation, two carboxylate groups axial and one equatorial, is only found in [UO2Cs(kta)] (6), in which uranyl cations and ligands alone form a honeycomb assembly, the caesium cations being decorating species.

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“…Metal-organic frameworks (MOFs) are a widely investigated class of nanoporous crystalline materials consisting of metal nodes connected by multidirectional organic linker molecules. [1][2][3][4][5][6] The recent rapid explosion of interest in MOFs arises from their various properties such as gas sorption, [7][8][9] sensing, [10,11] catalysis, [12] proton conductivity, [13,14] and electrical properties. [15][16][17][18][19][20][21][22][23] Not only do MOFs have high porosity and crystallinity, they are also more suitable for designing new structures than conventional porous materials such as activated carbon, zeolite and aluminophosphates; [24,25] the size and shape of the pores of MOFs can be controlled by various combinations of structural components.…”

Section: Introductionmentioning

confidence: 99%

Emergence of Surface‐ and Interface‐Induced Structures and Properties in Metal–Organic Framework Thin Films

2018

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Metal–organic frameworks (MOFs) are of particular interest to researchers because of their structural diversity and variety of properties. MOF thin films have been intensively investigated for potential applications such as membranes, gas sensors, catalysts, etc. Although most MOF thin films have almost the same structure and properties as their bulk, some MOF thin films show remarkable structural changes and hidden properties that are not observed in the bulk. These phenomena would be induced by the surface and the interface. Recent improvements in thin‐film fabrication methods enabled us to construct MOF thin films and discuss the properties based on the structure, thickness and crystalline orientation in detail. This microreview describes and discusses the fascinating nature of MOF thin films originating from surface/interface. This paper is expected to help with the construction of a research strategy for MOF thin films to obtain hidden structures and properties of MOFs that are not observed in their bulk.

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C–H activation

Cited by 24 publications

References 8 publications

Flexible Ligand‐Based Lanthanide Three‐Dimensional Metal–Organic Frameworks with Tunable Solid‐State Photoluminescence and OH‐Solvent‐Sensing Properties

Flexible Ligand‐Based Lanthanide Three‐Dimensional Metal–Organic Frameworks with Tunable Solid‐State Photoluminescence and OH‐Solvent‐Sensing Properties

Dipodal, Tripodal, and Discoidal Coordination Modes of Kemp's Triacid Anions

Emergence of Surface‐ and Interface‐Induced Structures and Properties in Metal–Organic Framework Thin Films

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