Luminescent metal–organic frameworks

Allendorf, Mark D.; Bauer, Carl J.; Bhakta, Raghu; Houk, Ronald J. T.

doi:10.1039/b802352m

Cited by 4,640 publications

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References 134 publications

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“…In addition, luminescence can also be generated from guest chromophore or charge transfer between the host framework and guest molecules. The diversified luminescence mechanisms make MOFs a unique platform for various luminescence applications 2, 3, 4, 26, 27, 28, 29…”

Section: Introductionmentioning

confidence: 99%

Photoluminescent Metal–Organic Frameworks for Gas Sensing

et al. 2016

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Luminescence of porous coordination polymers (PCPs) or metal–organic frameworks (MOFs) is sensitive to the type and concentration of chemical species in the surrounding environment, because these materials combine the advantages of the highly regular porous structures and various luminescence mechanisms, as well as diversified host‐guest interactions. In the past few years, luminescent MOFs have attracted more and more attention for chemical sensing of gas‐phase analytes, including common gases and vapors of solids/liquids. While liquid‐phase and gas‐phase luminescence sensing by MOFs share similar mechanisms such as host‐guest electron and/or energy transfer, exiplex formation, and guest‐perturbing of excited‐state energy level and radiation pathways, via various types of host‐guest interactions, gas‐phase sensing has its unique advantages and challenges, such as easy utilization of encapsulated guest luminophores and difficulty for accurate measurement of the intensity change. This review summarizes recent progresses by using luminescent MOFs as reusable sensing materials for detection of gases and vapors of solids/liquids especially for O2, highlighting various strategies for improving the sensitivity, selectivity, stability, and accuracy, reducing the materials cost, and developing related devices.

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Section: Introductionmentioning

confidence: 99%

Photoluminescent Metal–Organic Frameworks for Gas Sensing

et al. 2016

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“…1,2 Interest in these compounds has been motivated not only due to their interesting structures, but as a method to obtain solid materials with diverse applications in catalysis, 3 gas storage, magnetism, 4 and luminescence. 5 As a result, a variety of networks with interesting structures and topologies have been reported, and in particular, rigid organic ligands based upon N-donor ligands such as 4,4′-bipyridine (4,4′-bpy) have been heavily utilised, since they afford a high degree of control over the resulting coordination frameworks. Similarly, due to their more predictable coordination geometry, a large majority of research efforts in this area have focused on the use of d-block transition metal cations or clusters.…”

Section: Introductionmentioning

confidence: 99%

Structural features and near infra-red (NIR) luminescence of isomeric Yb(iii) bipyridyl-N,N′-dioxide coordination polymers

2015

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The synthesis and structural characterization of a series of lanthanide complexes formed from YbX 3 salts (X = NO 3 − or CF 3 SO 3 − ) and the isomeric 4,4'-bipyridine-N,N'-dioxide (4,4'-bpdo) or 3,3'-bipyridine-N,N'-dioxide (3,3'-bpdo) ligands has been undertaken by X-ray crystallography. Depending on the choice of anion, the complexes isolated with L = 4,4'-bpdo yield either an extended 1D linear chain In an effort to rationalize the observed difference in coordinating behavior, DFT calculations of the isomeric bipyridyl-N,N'-dioxide ligands have been undertaken, but revealed no significant differences in the charge distribution of the coordinating N-oxide groups. Lastly, sensitized Yb(III) emission in the Near Infra-Red (NIR) region operating via the well-known antennae effect has been observed and compared for two of the coordination polymers.

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“…10,11 Furthermore, some guest molecules within MOFs can also emit and/or induce luminescence. 12 Currently, MOFs are considered as materials with great potential and with possible industrial applications such as, for example, luminescent materials, 13 sensors, 14 and photocatalysts. 15 With numerous unique properties, MOF-5, which was invented by Yaghi and co-workers 16 in 1999, has become one of the more promising MOFs.…”

Section: ■ Introductionmentioning

confidence: 99%

Luminescent Properties of Metal–Organic Framework MOF-5: Relativistic Time-Dependent Density Functional Theory Investigations

et al. 2012

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The electronically excited state and luminescence property of metal−organic framework MOF-5 were investigated using relativistic density functional theory (DFT) and timedependent DFT (TDDFT). The geometry, IR spectra, and UV− vis spectra of MOF-5 in the ground state were calculated using relativistic DFT, leading to good agreement between the experimental and theoretical results. The frontier molecular orbitals and electronic configuration indicated that the luminescence mechanism in MOF-5 follows ligand-to-ligand charge transfer (LLCT), namely, π* → π, rather than emission with the ZnO quantum dot (QD) proposed by Bordiga et al. The geometry and IR spectra of MOF-5 in the electronically excited state have been calculated using the relativistic TDDFT and compared with those for the ground state. The comparison reveals that the Zn 4 O 13 QD is rigid, whereas the ligands BDC 2− are nonrigid. In addition, the calculated emission band of MOF-5 is in good agreement with the experimental result and is similar to that of the ligand H 2 BDC. The combined results confirmed that the luminescence mechanism for MOF-5 should be LLCT with little mixing of the ligandto-metal charge transfer. The reason for the MOF-5 luminescence is explained by the excellent coplanarity between the sixmembered ring consisting of zinc, oxygen, carbon, and the benzene ring.

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Luminescent metal–organic frameworks

Cited by 4,640 publications

References 134 publications

Photoluminescent Metal–Organic Frameworks for Gas Sensing

Photoluminescent Metal–Organic Frameworks for Gas Sensing

Structural features and near infra-red (NIR) luminescence of isomeric Yb(iii) bipyridyl-N,N′-dioxide coordination polymers

Luminescent Properties of Metal–Organic Framework MOF-5: Relativistic Time-Dependent Density Functional Theory Investigations

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