scholarly journals Förster Energy Transport in Metal–Organic Frameworks Is Beyond Step-by-Step Hopping

2016 ◽  
Vol 138 (16) ◽  
pp. 5308-5315 ◽  
Author(s):  
Qiongqiong Zhang ◽  
Cankun Zhang ◽  
Lingyun Cao ◽  
Zi Wang ◽  
Bing An ◽  
...  
Keyword(s):  
Energy Transport ◽  
Metal Organic Frameworks ◽  
Metal Organic

Ultrafast Energy Migration in Porphyrin-based Metal Organic Frameworks (MOFs)

2013 ◽  
Vol 1539 ◽  
Author(s):  
Sameer Patwardhan ◽  
Shengye Jin ◽  
Ho-Jin Son ◽  
George C. Schatz
Keyword(s):  
Transport Properties ◽  
Energy Transport ◽  
Metal Organic Frameworks ◽  
Molecular Organization ◽  
Striking Difference ◽  
Theory Analysis ◽  
Singlet Exciton ◽  
Exciton Migration ◽  
Exciton Transport ◽  
Metal Organic

ABSTRACTIn this paper, we have studied the energy transport properties of two porphyrincontaining metal organic frameworks (MOFs) for light-harvesting applications. The photoinduced singlet exciton migration is investigated using fluorescence quenching experiments, whereas details on exciton transport anisotropy and net displacements are obtained using a Förster theory analysis. The striking difference in the energy-transport properties for the two MOFs, albeit for similar molecular organization, is attributed to dissimilar spatial expanse and difference in the electronic structure of their porphyrin struts. The observed exciton displacements, of up to 60 nm, provides motivation to explore new MOF materials. Several new linkers are considered, leading to predictions of MOF structures, which provide both broadwavelength harvesting and unidirectional energy transporting MOFs with selected examples.

scholarly journals Crystallographic studies of gas sorption in metal–organic frameworks

2014 ◽  
Vol 70 (3) ◽  
pp. 404-422 ◽  
Author(s):  
Elliot J. Carrington ◽  
Iñigo J. Vitórica-Yrezábal ◽  
Lee Brammer
Keyword(s):  
Energy Transport ◽  
Modular Design ◽  
Metal Organic Frameworks ◽  
X Rays ◽  
Gas Sorption ◽  
Sorption Behaviour ◽  
Crystalline Materials ◽  
Metal Organic ◽  
Gas Molecules

Metal–organic frameworks (MOFs) are a class of porous crystalline materials of modular design. One of the primary applications of these materials is in the adsorption and separation of gases, with potential benefits to the energy, transport and medical sectors.In situcrystallography of MOFs under gas atmospheres has enabled the behaviour of the frameworks under gas loading to be investigated and has established the precise location of adsorbed gas molecules in a significant number of MOFs. This article reviews progress in such crystallographic studies, which has taken place over the past decade, but has its origins in earlier studies of zeolites, clathratesetc. The review considers studies by single-crystal or powder diffraction using either X-rays or neutrons. Features of MOFs that strongly affect gas sorption behaviour are discussed in the context ofin situcrystallographic studies, specifically framework flexibility, and the presence of (organic) functional groups and unsaturated (open) metal sites within pores that can form specific interactions with gas molecules.

Metal–organic framework materials for light-harvesting and energy transfer

2015 ◽  
Vol 51 (17) ◽  
pp. 3501-3510 ◽  
Author(s):  
Monica C. So ◽  
Gary P. Wiederrecht ◽  
Joseph E. Mondloch ◽  
Joseph T. Hupp ◽  
Omar K. Farha
Keyword(s):  
Energy Transfer ◽  
Solar Cells ◽  
Recent Work ◽  
Energy Transport ◽  
Light Harvesting ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Framework Materials ◽  
Metal Organic ◽  
Excitonic Solar Cells

This contribution highlights recent work on the photon collection and energy transport behavior of metal–organic frameworks for excitonic solar cells.

Metal-Organic Frameworks

2021 ◽  
Author(s):  
Lars Öhrström ◽  
Francoise M. Amombo Noa
Keyword(s):  
Metal Organic Frameworks ◽  
Metal Organic

Substrate templated synthesis of single-phase and uniform Zr-porphyrin-based metal–organic frameworks

2020 ◽  
Vol 7 (1) ◽  
pp. 221-231
Author(s):  
Seong Won Hong ◽  
Ju Won Paik ◽  
Dongju Seo ◽  
Jae-Min Oh ◽  
Young Kyu Jeong ◽  
...  
Keyword(s):  
Chemical Bath Deposition ◽  
Single Phase ◽  
Metal Organic Frameworks ◽  
Templated Synthesis ◽  
Pore Structures ◽  
Phase Pure ◽  
Metal Organic ◽  
Cbd Method

We successfully demonstrate that the chemical bath deposition (CBD) method is a versatile method for synthesizing phase-pure and uniform MOFs by controlling their nucleation stages and pore structures.

Tuning the Redox Activity of Metal−Organic Frameworks for Enhanced, Selective O2 Binding

2019 ◽  
Author(s):  
Andrew Rosen ◽  
M. Rasel Mian ◽  
Timur Islamoglu ◽  
Haoyuan Chen ◽  
Omar Farha ◽  
...  
Keyword(s):  
Density Functional ◽  
Metal Organic Frameworks ◽  
Redox Activity ◽  
Screening Methods ◽  
Bridging Ligands ◽  
Metal Centers ◽  
Computational Screening ◽  
Open Metal Sites ◽  
Metal Organic ◽  
Unsaturated Metal Sites

<p>Metal−organic frameworks (MOFs) with coordinatively unsaturated metal sites are appealing as adsorbent materials due to their tunable functionality and ability to selectively bind small molecules. Through the use of computational screening methods based on periodic density functional theory, we investigate O<sub>2</sub> and N<sub>2</sub> adsorption at the coordinatively unsaturated metal sites of several MOF families. A variety of design handles are identified that can be used to modify the redox activity of the metal centers, including changing the functionalization of the linkers (replacing oxido donors with sulfido donors), anion exchange of bridging ligands (considering μ-Br<sup>-</sup>, μ-Cl<sup>-</sup>, μ-F<sup>-</sup>, μ-SH<sup>-</sup>, or μ-OH<sup>-</sup> groups), and altering the formal oxidation state of the metal. As a result, we show that it is possible to tune the O<sub>2</sub> affinity at the open metal sites of MOFs for applications involving the strong and/or selective binding of O<sub>2</sub>. In contrast with O<sub>2</sub> adsorption, N<sub>2</sub> adsorption at open metal sites is predicted to be relatively weak across the MOF dataset, with the exception of MOFs containing synthetically elusive V<sup>2+</sup> open metal sites. As one example from the screening study, we predict that exchanging the μ-Cl<sup>-</sup> ligands of M<sub>2</sub>Cl<sub>2</sub>(BBTA) (H<sub>2</sub>BBTA = 1<i>H</i>,5<i>H</i>-benzo(1,2-d:4,5-d′)bistriazole) with μ-OH<sup>-</sup> groups would significantly enhance the strength of O<sub>2</sub> adsorption at the open metal sites without a corresponding increase in the N<sub>2</sub> affinity. Experimental investigation of Co<sub>2</sub>Cl<sub>2</sub>(BBTA) and Co<sub>2</sub>(OH)<sub>2</sub>(BBTA) confirms that the former exhibits only weak physisorption, whereas the latter is capable of chemisorbing O<sub>2</sub> at room temperature. The chemisorption behavior is attributed to the greater electron-donating character of the μ-OH<sup>-</sup><sub> </sub>ligands and the presence of H-bonding interactions between the μ-OH<sup>-</sup> bridging ligands and the O<sub>2</sub> adsorbate.</p>

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