Metal–Organic Frameworks assembled from tetraphosphonic ligands and lanthanides

Firmino, Ana D. G.; Figueira, Flávio; Tomé, João P. C.; Paz, Filipe A. Almeida; Rocha, João

doi:10.1016/j.ccr.2017.08.001

Cited by 92 publications

(54 citation statements)

References 83 publications

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“…This class of porous polymeric material is assembled by the connection of a metal ion linked together by organic bridging ligands to form 1D, 2D, or 3D structures as illustrated in Figure . Since there are a variety of different metal ions and organic linkers, essentially an infinite number of possible combinations exist …”

Section: Introductionmentioning

confidence: 99%

Evaluation of the BET Theory for the Characterization of Meso and Microporous MOFs

et al. 2018

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Surface area determination with the Brunauer–Emmett–Teller (BET) method is a widely used characterization technique for metal–organic frameworks (MOFs). Since these materials are highly porous, the use of the BET theory can be problematic. Several researchers have evaluated the BET method to gain insights into the usefulness of the obtained results and interestingly, their findings are not always consistent. In this review, the suitability of the BET method is discussed for MOFs that have a diverse range of pore widths below the diameters of N2 or Ar and above 20 Å. In addition, the surface area of MOFs that are obtained by implementing different approaches, such as grand canonical Monte Carlo simulations, calculations from the crystal structures or based on experimental N2, Ar, or CO2 adsorption isotherms, are compared and evaluated. Inconsistencies in the state‐of‐the‐art are also noted. Based on the current literature, an overview is provided of how the BET method can give useful estimations of the surface areas for the majority of MOFs, but there are some crucial and specific exceptions which are highlighted in this review.

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Section: Introductionmentioning

confidence: 99%

Evaluation of the BET Theory for the Characterization of Meso and Microporous MOFs

et al. 2018

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“…[11d, 13] Thee mission colors,e xcitation bands,a nd pores/ channels can be finely tuned by varying the lanthanide ions and organic linkers. [14] Intelligent MOF materials with remote-controllable capacity can be achieved by incorporating photoswitchable molecules. [15] However,b esides tedious synthesis of the organic linkers,d irectly integrating photochromic units as part of the linker molecules and incorporating them into the backbone of MOF structures also usually lead to limited isomerization yield and slow isomerization speed since isomerization is hindered in the rigid crystalline frameworks.…”

Section: Introductionmentioning

confidence: 99%

Loading Photochromic Molecules into a Luminescent Metal–Organic Framework for Information Anticounterfeiting

Wang

et al. 2019

Angewandte Chemie

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Stimuli-responsive photoluminescent materials have attracted considerable attention owingt ot heir potential applications in security protection because the information recorded directly in materials with static luminescent outputs are usually visible under either ambient or UV light. Herein, we realizer eversible information anticounterfeiting by loading ap hotoswitchable diarylethene derivative into al anthanide metal-organic framework (MOF). Light triggers the open-and closed-form isomerization of the diarylethene unit, which respectively regulates the inactivation and activation of the photochromic FRET process between the diarylethene acceptor and lanthanide donor,r esulting in reversible luminescence on-off switching of the lanthanide emitting center in the MOF host. This photoresponsive host-guest system allows for reversible multiple information pattern visible/invisible transformation by simply alternating the exposure to UV and visible light.

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“…[1] Based on the above advantages, MOFs have been explored for aw ide variety of popular applicationss uch as gas sorptiona nd separation, [2] catalysis, [3] drug delivery, [4] etc. [5] Apart from thesec onventional applications,M OFs also have shown great potentiala sp roton conductors [6][7][8][9][10][11] ands ensors. [12][13][14][15][16][17][18] It is well known that protonc onductors have significantp otential for applicationi nt he field of fuel cells.…”

Section: Introductionmentioning

confidence: 99%

A Highly Stable Two‐Dimensional Copper(II) Organic Framework for Proton Conduction and Ammonia Impedance Sensing

Sun

Zhao

et al. 2018

Chemistry A European J

110

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This work reports the design and fabrication of a proton conductive 2D metal-organic framework (MOF), [Cu(p-IPhHIDC)] (1) (p-IPhH IDC=2-(p-N-imidazol-1-yl)-phenyl-1 H-imidazole-4,5-dicarboxylic acid) as an advanced ammonia impedance sensor at room temperature and 68-98 % relative humidity (RH). MOF 1 shows the optimized proton conductivity value of 1.51×10 S cm at 100 °C and 98 % RH. Its temperature-dependent and humidity-dependent proton conduction properties have been explored. The large amount of uncoordinated carboxylate groups between the layers plays a vital role in the resultant conductivity. Distinctly, the fabricated MOF-based sensor displays the required stability toward NH , enhanced sensitivity, and notable selectivity for NH gas. At room temperature and 68 % RH, it gives a remarkable gas response of 8620 % to 130 ppm NH gas and lower detection limit of 2 ppm towards NH gas. It is also found that the gas response of the ammonia sensor increases linearly with the increase of NH gas concentration under 68-98 % RH and room temperature. Moreover, the sensor indicates excellent reversibility and selectivity toward NH versus N , H , O , CO, CO , benzene, and MeOH. Based on structural analyses, activation energy calculations, water and NH vapor absorptions, and PXRD determinations, proton conduction and NH sensing mechanisms are suggested.

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Metal–Organic Frameworks assembled from tetraphosphonic ligands and lanthanides

Cited by 92 publications

References 83 publications

Evaluation of the BET Theory for the Characterization of Meso and Microporous MOFs

Evaluation of the BET Theory for the Characterization of Meso and Microporous MOFs

Loading Photochromic Molecules into a Luminescent Metal–Organic Framework for Information Anticounterfeiting

A Highly Stable Two‐Dimensional Copper(II) Organic Framework for Proton Conduction and Ammonia Impedance Sensing

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