Schalten in Metall‐organischen Gerüsten

Bigdeli, Fahime; Lollar, Christina; Morsali, Ali; Zhou, Hong‐Cai

doi:10.1002/ange.201900666

Cited by 22 publications

(2 citation statements)

References 106 publications

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“…As porous coordination polymers, metal–organic frameworks (MOFs), which were fabricated from organic linkers and metal centers or clusters, have attracted intensive attention as a fascinating class of crystal materials [1–3] . Because of their unique characteristics, such as periodic structures, ordered open channels, high permanent porosity, and large surface areas, [4,5] MOFs have exhibited excellent performance in the catalytic reaction, separation of different gases, charge transport, and intelligent devices [6–9] . In recent years, stimuli‐responsive MOFs, which are responsive to light, [10–14] temperature, [15] pH, [16] and other stimuli, [17] have aroused increasing attention in various areas.…”

Section: Introductionmentioning

confidence: 99%

Isomerization of DASA Molecules in the Nanopores of Metal–Organic Frameworks: What Determines Its Reversibility?**

Chen

Gao

Cheng

et al. 2023

Chemistry A European J

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In recent years, light‐responsive molecules have been incorporated in metal–organic frameworks (MOFs) to fabricate light‐responsive intelligent devices, where reversible isomerization of the guest molecules in the nanopores is crucial. However, how to design a porous environment of MOFs to achieve a reversible isomerization remains unknown until now. In this work, donor–acceptor Stenhouse adducts (DASAs), a new kind of visible light responsive compound, were confined in the nanopores of different MOFs to study their isomerization upon visible‐light irradiation/mild heating. We found that the polarity of the pore environment is the key to control the reversibility of isomerization of such guest molecules. Under the guidance of this principle, MIL‐53(Al) was screened to investigate the proton conductivity and switching performance of the DASA‐confined MOF. The proton conductance was up to 0.013 S cm−1 at 80 °C and 98 % RH, and at least 30 switching cycles were achieved thanks to the Grotthuss‐type mechanism and the low polarity of MIL‐53(Al) pore environment.

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Section: Introductionmentioning

confidence: 99%

Isomerization of DASA Molecules in the Nanopores of Metal–Organic Frameworks: What Determines Its Reversibility?**

Chen

Gao

Cheng

et al. 2023

Chemistry A European J

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“…In recent years, stimulus‐responsive smart materials have gained great attention due to their wide applications in switches, sensors and memory devices [1–3] . Lanthanide‐based single‐molecule magnets (Ln−SMMs) are excellent candidates in this regard because their magnetic dynamics are sensitive to subtle structural changes triggered by external factors [4,5] such as solvent, [6–9] temperature, [10] light, [11–14] redox, [15,16] and mechanical force [17,18] .…”

Section: Introductionmentioning

confidence: 99%

X‐Ray Triggered Coordination‐Bond Breakage in Dysprosium‐Organic Framework and its Impact on Magnetic Properties

Zou

Wang

Chen

et al. 2023

Chemistry A European J

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Photosensitive lanthanide‐based single‐molecule magnets (Ln−SMM) are very attractive for their potential applications in information storage, switching, and sensors. However, the light‐driven structural transformation in Ln−SMMs hardly changes the coordination number of the lanthanide ion. Herein, for the first time it is reported that X‐ray (λ=0.71073 Å) irradiation can break the coordination bond of Dy−OH2 in the three‐dimensional (3D) metal‐organic framework Dy2(amp2H2)3(H2O)6 ⋅ 4H2O (MDAF‐5), in which the {Dy2(OPO)2} dimers are cross‐linked by dianthracene‐phosphonate ligands. The structural transformation proceeds in a single‐crystal‐to‐single‐crystal (SC‐SC) fashion, forming the new phase Dy2(amp2H2)3(H2O)4 ⋅ 4H2O (MDAF‐5‐X). The phase transition is accompanied by a significant change in magnetic properties due to the alteration in coordination geometry of the DyIII ion from a distorted pentagonal bipyramid in MDAF‐5 to a distorted octahedron in MDAF‐5‐X.

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Structural‐Deformation‐Energy‐Modulation Strategy in a Soft Porous Coordination Polymer with an Interpenetrated Framework

Zheng

Otake

et al. 2020

Angewandte Chemie

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To achieve unique molecular‐recognition patterns, a rational control of the flexibility of porous coordination polymers (PCPs) is highly sought, but it remains elusive. From a thermodynamic perspective, the competitive relationship between the structural deformation energy (Edef) of soft PCPs and the guest interaction is key for selective a guest‐triggered structural‐transformation behavior. Therefore, it is vital to investigate and control Edef to regulate this competition for flexibility control. Driven by these theoretical insights, we demonstrate an Edef‐modulation strategy via encoding inter‐framework hydrogen bonds into a soft PCP with an interpenetrated structure. As a proof of this concept, the enhanced Edef of PCP enables a selective gate‐opening behavior toward CHCl3 over CH2Cl2 by changing the adsorption‐energy landscape of the compounds. This study provides a new direction for the design of functional soft porous materials.

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Schalten in Metall‐organischen Gerüsten

Cited by 22 publications

References 106 publications

Isomerization of DASA Molecules in the Nanopores of Metal–Organic Frameworks: What Determines Its Reversibility?**

Isomerization of DASA Molecules in the Nanopores of Metal–Organic Frameworks: What Determines Its Reversibility?**

X‐Ray Triggered Coordination‐Bond Breakage in Dysprosium‐Organic Framework and its Impact on Magnetic Properties

Structural‐Deformation‐Energy‐Modulation Strategy in a Soft Porous Coordination Polymer with an Interpenetrated Framework

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