Photoinduced-electron-transfer-driven surface modification to regulate adsorption behavior in a pyridinium-decorated metal–organic framework

2019 ◽  
Vol 55 (85) ◽  
pp. 12829-12832 ◽  
Author(s):  
Xiao-Dong Yang ◽  
Na Gao ◽  
Shuai Ma ◽  
Jing-Wang Cui ◽  
Meng-Ze Jia ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Surface Modification ◽  
Photoinduced Electron Transfer ◽  
Metal Organic Framework ◽  
Adsorption Behavior ◽  
Polar Molecules ◽  
Adsorption Behaviors ◽  
Metal Organic ◽  
Organic Framework

Photoinduced-electron-transfer-driven surface modification was presented in a pyridinium-decorated metal–organic framework and found to be effective to regulate its adsorption behaviors toward polar molecules and halogens.

Selective chemochromic and chemically-induced photochromic response of a metal–organic framework

2020 ◽  
Vol 56 (44) ◽  
pp. 5929-5932 ◽  
Author(s):  
Peng Li ◽  
Qi Sui ◽  
Meng-Yue Guo ◽  
Shuai-Liang Yang ◽  
Ran Bu ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Electron Acceptor ◽  
Photoinduced Electron Transfer ◽  
Color Change ◽  
Metal Organic Framework ◽  
Confined Space ◽  
Chemically Induced ◽  
Metal Organic ◽  
Organic Framework

The MOF provides unique confined space furnished with electron acceptor sites, and exposure to amines/alcohols causes specific and size-selective direct/UV-assisted color change owing to spontaneous/photoinduced electron transfer.

Highly selective metal–organic framework-based sensor for protamine through photoinduced electron transfer

2018 ◽  
Vol 54 (4) ◽  
pp. 3144-3155 ◽  
Author(s):  
Fei Qu ◽  
Xiaonan Li ◽  
Xiaoxia Lv ◽  
Jinmao You ◽  
Wenli Han
Keyword(s):  
Electron Transfer ◽  
Photoinduced Electron Transfer ◽  
Metal Organic Framework ◽  
Metal Organic ◽  
Organic Framework

A fourfold interpenetrating cadmium(II) metal–organic framework based on 2,4,6-tris(pyridin-4-yl)-1,3,5-triazine with reversible photochromic properties

2019 ◽  
Vol 75 (3) ◽  
pp. 372-377 ◽  
Author(s):  
Jian-Jun Liu ◽  
Li-Zhi Li ◽  
Chun-Ping Chen ◽  
Jin-Zhong Wei ◽  
Fei-Xiang Cheng
Keyword(s):  
Electron Transfer ◽  
Photoinduced Electron Transfer ◽  
Metal Organic Framework ◽  
Crystal Structure Analysis ◽  
X Ray Diffraction ◽  
Photochromic Properties ◽  
X Ray ◽  
Good Thermal Stability ◽  
Metal Organic ◽  
Organic Framework

2,4,6-Tris(pyridin-4-yl)-1,3,5-triazine (tpt), as an organic molecule with an electron-deficient nature, has attracted considerable interest because of its photoinduced electron transfer from neutral organic molecules to form stable anionic radicals. This makes it an excellent candidate as an organic linker in the construction of photochromic complexes. Such a photochromic three-dimensional (3D) metal–organic framework (MOF) has been prepared using this ligand. Crystallization of tpt with Cd(NO3)2·4H2O in an N,N-dimethylacetamide–methanol mixed-solvent system under solvothermal conditions afforded the 3D MOF poly[[bis(nitrato-κ2 O,O′)cadmium(II)]-μ3-2,4,6-tris(pyridin-4-yl)-1,3,5-triazine-κ3 N 2:N 4:N 6], [Cd(NO3)2(C18H12N6)] n , which was characterized by IR spectroscopy, elemental analysis, thermogravimetric analysis and single-crystal X-ray diffraction. The X-ray diffraction crystal structure analysis reveals that the asymmetric unit contains one independent CdII cation, one tpt ligand and two coordinated NO3 − anions. The CdII cations are connected by tpt ligands to generate a 3D framework. The single framework leaves voids that are filled by mutual interpenetration of three independent equivalent frameworks in a fourfold interpenetrating architecture. The compound shows a good thermal stability and exhibits a reversible photochromic behaviour, which may originate from the photoinduced electron-transfer generation of radicals in the tpt ligand.

Guest to framework photoinduced electron transfer in a cobalt substituted RWLC-2 metal organic framework

2018 ◽  
Vol 47 (28) ◽  
pp. 9250-9256 ◽  
Author(s):  
Christopher R. McKeithan ◽  
Lukasz Wojtas ◽  
Randy W. Larsen
Keyword(s):  
Electron Transfer ◽  
Porous Materials ◽  
Photoinduced Electron Transfer ◽  
Light Harvesting ◽  
Metal Organic Framework ◽  
Metal Organic ◽  
Organic Framework

Photoinduced electron transfer (PET) between donors and acceptors in porous materials is a key element in the development of light harvesting applications.

Fixed distance photoinduced electron transfer between Fe and Zn porphyrins encapsulated within the Zn HKUST-1 metal organic framework

2015 ◽  
Vol 44 (7) ◽  
pp. 2959-2963 ◽  
Author(s):  
Randy W. Larsen ◽  
Lukasz Wojtas
Keyword(s):  
Electron Transfer ◽  
Electron Donor ◽  
Electron Acceptor ◽  
Photoinduced Electron Transfer ◽  
Metal Organic Framework ◽  
Fixed Distance ◽  
Metal Organic ◽  
Organic Framework

An attractive strategy for the development of photocatalytic metal organic framework (MOF) materials is to co-encapsulate a photoactive electron donor with a catalytic electron acceptor within the MOF.

scholarly journals A Cu(ii) metal–organic framework as a recyclable catalyst for ARGET ATRP

2016 ◽  
Vol 7 (47) ◽  
pp. 7199-7203 ◽  
Author(s):  
Hui-Chun Lee ◽  
Markus Antonietti ◽  
Bernhard V. K. J. Schmidt
Keyword(s):  
Electron Transfer ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Metal Organic Framework ◽  
Recyclable Catalyst ◽  
Atom Transfer ◽  
Arget Atrp ◽  
Metal Organic ◽  
Organic Framework

A Cu(ii) MOF can serve as an comprehensive catalyst for activators regenerated by electron transfer atom transfer radical polymerization (ARGET ATRP) in the synthesis of benzyl methacrylate, styrene, isoprene and 4-vinylpyridine.

Divergent Adsorption Behavior Controlled by Primary Coordination Sphere Anions in the Metal–Organic Framework Ni2X2BTDD

2021 ◽  
Author(s):  
Julius J. Oppenheim ◽  
Jenna L. Mancuso ◽  
Ashley M. Wright ◽  
Adam J. Rieth ◽  
Christopher H. Hendon ◽  
...  
Keyword(s):  
Coordination Sphere ◽  
Metal Organic Framework ◽  
Adsorption Behavior ◽  
Metal Organic ◽  
Organic Framework

Size-Control and Surface Modification of Flexible Metal-Organic Framework MIL-53(Fe) by Polyethyleneglycol for 5- Fluorouracil Anticancer Drug Delivery

2019 ◽  
Vol 4 (8) ◽  
pp. 2333-2338 ◽  
Author(s):  
Hoai Phuong Nguyen Thi ◽  
Ha Duc Ninh ◽  
Chinh Van Tran ◽  
Bac Thanh Le ◽  
Sheshanath V. Bhosale ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Surface Modification ◽  
Anticancer Drug ◽  
Metal Organic Framework ◽  
Size Control ◽  
Anticancer Drug Delivery ◽  
Metal Organic ◽  
Flexible Metal ◽  
Organic Framework

Photoresponsivity and antibiotic sensing properties of an entangled tris(pyridinium)-based metal–organic framework

2020 ◽  
Vol 49 (22) ◽  
pp. 7488-7495 ◽  
Author(s):  
Peng Li ◽  
Meng-Yue Guo ◽  
Lu-Lu Gao ◽  
Xue-Mei Yin ◽  
Shuai-Liang Yang ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Metal Organic Framework ◽  
Sensing Properties ◽  
Luminescent Sensor ◽  
Donor Acceptor ◽  
Metal Organic ◽  
Nitrofuran Antibiotics ◽  
Organic Framework

Novel 2D → 2D entanglement affords close donor–acceptor contacts for electron transfer based photochromism and photomodulable fluorescence of a MOF, which also serves as a regenerable and sensitive luminescent sensor for nitrofuran antibiotics.

scholarly journals The impact of crystal size and temperature on the adsorption-induced flexibility of the Zr-based metal–organic framework DUT-98

2019 ◽  
Vol 10 ◽  
pp. 1737-1744 ◽  
Author(s):  
Simon Krause ◽  
Volodymyr Bon ◽  
Hongchu Du ◽  
Rafal E Dunin-Borkowski ◽  
Ulrich Stoeck ◽  
...  
Keyword(s):  
Crystal Size ◽  
Metal Organic Framework ◽  
Adsorption Behavior ◽  
Switching Behavior ◽  
Type I ◽  
X Ray Diffraction ◽  
X Ray ◽  
Metal Organic ◽  
The Impact ◽  
Organic Framework

In this contribution we analyze the influence of adsorption cycling, crystal size, and temperature on the switching behavior of the flexible Zr-based metal–organic framework DUT-98. We observe a shift in the gate-opening pressure upon cycling of adsorption experiments for micrometer-sized crystals and assign this to a fragmentation of the crystals. In a series of samples, the average crystal size of DUT-98 crystals was varied from 120 µm to 50 nm and the obtained solids were characterized by X-ray diffraction, infrared spectroscopy, as well as scanning and transmission electron microscopy. We analyzed the adsorption behavior by nitrogen and water adsorption at 77 K and 298 K, respectively, and show that adsorption-induced flexibility is only observed for micrometer-sized crystals. Nanometer-sized crystals were found to exhibit reversible type I adsorption behavior upon adsorption of nitrogen and exhibit a crystal-size-dependent steep water uptake of up to 20 mmol g−1 at 0.5 p/p 0 with potential for water harvesting and heat pump applications. We furthermore investigate the temperature-induced structural transition by in situ powder X-ray diffraction. At temperatures beyond 110 °C, the open-pore state of the nanometer-sized DUT-98 crystals is found to irreversibly transform to a closed-pore state. The connection of crystal fragmentation upon adsorption cycling and the crystal size dependence of the adsorption-induced flexibility is an important finding for evaluation of these materials in future adsorption-based applications. This work thus extends the limited amount of studies on crystal size effects in flexible MOFs and hopefully motivates further investigations in this field.

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