Syntheses, structures, and photoluminescent properties of a series of metal–organic frameworks constructed by 5,5′-bis(1H-imidazol-1-yl)-2,2′-bithiophene and various carboxylate ligands

CrystEngComm ◽  
2014 ◽  
Vol 16 (5) ◽  
pp. 900-909 ◽  
Author(s):  
Zhi-Qiang Shi ◽  
Yi-Zhi Li ◽  
Zi-Jian Guo ◽  
He-Gen Zheng
Keyword(s):  
Metal Organic Frameworks ◽  
Carboxylate Ligands ◽  
Metal Organic

scholarly journals Simple, Scalable Mechanosynthesis of Metal-Organic Frameworks Using Liquid-Assisted Resonant Acoustic Mixing (LA-RAM)

2020 ◽  
Author(s):  
Hatem M. Titi ◽  
Jean-Louis Do ◽  
Ashlee J. Howarth ◽  
Karthik Nagapudi ◽  
Tomislav Friscic
Keyword(s):  
Metal Organic Frameworks ◽  
Scale Up ◽  
Three Dimensional ◽  
Mixed Ligand ◽  
Carboxylate Ligands ◽  
Metal Organic ◽  
Resonant Acoustic Mixing

We present a methodology for the rapid and readily scalable mechanosynthesis of diverse metal-organic frameworks (MOFs) in the absence of milling media, typically required for other types of mechanochemical syntheses. We demonstrate the use of liquid-assisted resonant acoustic mixing (LA-RAM) methodology for the synthesis of two- and three-dimensional MOFs based on Zn, Co(II) and Cu(II), including single- and mixed-ligand systems, imidazolate or carboxylate ligands. The LA-RAM approach also allowed the synthesis of the ZIF-L, a framework never previously obtained in a solventless environment, as well as its Co(II) analogue. Straightforward scale-up from milligrams to at least 25 grams is demonstrated using ZIF-L as the model.<br>

Two imidazole multicarboxylate-based MOFs: Syntheses, structures and proton conductive properties

2021 ◽  
Author(s):  
Zhongcheng Guo ◽  
Yimeng Zhang ◽  
Jinggang Liu ◽  
Bingxue Han ◽  
Gang Li
Keyword(s):  
Metal Organic Frameworks ◽  
Proton Conduction ◽  
Carboxylate Ligands ◽  
Metal Organic ◽  
Conductive Properties ◽  
Structurally Stable

Considering the coordination advantage of N-heterocyclic carboxylate ligands in the construction of metal-organic frameworks (MOFs), we hope to adopt them to build up more structurally stable MOFs for proton conduction...

Constructing various metal–organic frameworks by mixed pyridine–acylamide and carboxylate ligands: ring-like or helical building blocks

CrystEngComm ◽  
2014 ◽  
Vol 16 (32) ◽  
pp. 7440-7451 ◽  
Author(s):  
Xiao-min Zhang ◽  
Yang Ning ◽  
Li-na Meng ◽  
Jian-qiang Li ◽  
Ming-biao Luo ◽  
...  
Keyword(s):  
Metal Organic Frameworks ◽  
Building Blocks ◽  
Carboxylate Ligands ◽  
Metal Organic

To some extent, this work has demonstrated the coordination affinity of the L ligand and gives us some understanding of how to direct the next syntheses of L-based compounds.

scholarly journals Electrochemically Triggered Dynamics Within a Hybrid Metal-Organic Electrocatalyst

2019 ◽  
Author(s):  
Nina Heidary ◽  
Mathieu Morency ◽  
Daniel Chartrand ◽  
Khoa Ly ◽  
Radu Iftimie ◽  
...  
Keyword(s):  
Experimental Data ◽  
Metal Organic Frameworks ◽  
Proof Of Concept ◽  
Reaction Intermediates ◽  
Carboxylate Ligands ◽  
Guest Species ◽  
Raman And Infrared Spectroscopy ◽  
Metal Organic ◽  
Responsive Behavior

<p> A wide array of systems, ranging from enzymes to synthetic catalysts, exert adaptive motifs to maximize their functionality. In a related manner, select metal-organic frameworks (MOFs) and related systems exhibit structural modulations under stimuli such as the infiltration of guest species. Probing their responsive behavior <i>in-situ</i> is a challenging but important step towards understanding their function and subsequently building from there. In this report, we investigate the dynamic behavior of an electrocatalytic Mn-porphyrin containing MOF system (Mn-MOF). We discover, using a combination of electrochemistry and <i>in-situ</i> probes of UV-Vis absorption, resonance Raman and infrared spectroscopy, a restructuration of this system via a reversible cleavage of the porphyrin carboxylate ligands under an applied voltage. We further show, by combining experimental data and DFT calculations, as a proof of concept, the capacity to utilize the Mn-MOF for electrochemical CO<sub>2</sub> fixation and to spectroscopically capture the reaction intermediates in its catalytic cycle. The findings of this work and methodology developed opens opportunities in the application of MOFs as dynamic, enzyme-inspired electrocatalytic systems.</p>

Metal–organic frameworks with 1,4-di(1H-imidazol-4-yl)benzene and varied carboxylate ligands for selectively sensing Fe(iii) ions and ketone molecules

2017 ◽  
Vol 46 (40) ◽  
pp. 13943-13951 ◽  
Author(s):  
Zhi-Qiang Liu ◽  
Yue Zhao ◽  
Xiu-Du Zhang ◽  
Yan-Shang Kang ◽  
Qing-Yi Lu ◽  
...  
Keyword(s):  
High Selectivity ◽  
Metal Organic Frameworks ◽  
Carboxylate Ligands ◽  
Metal Organic

Zn(ii) and Cd(ii) frameworks have potential for sensing Fe(iii) and ketone molecules with high selectivity and sensitivity.

What can pKa and NBO charges of the ligands tell us about the water and thermal stability of metal organic frameworks?

2014 ◽  
Vol 2 (38) ◽  
pp. 16250-16267 ◽  
Author(s):  
Ping Lu ◽  
Yong Wu ◽  
Hong Kang ◽  
Haiyan Wei ◽  
Hongke Liu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Metal Organic Frameworks ◽  
Heterocyclic Ligands ◽  
Carboxylate Ligands ◽  
Metal Organic ◽  
Thermal Stability Of ◽  
Nbo Charges

The pKa1 values and NBO charges of 32 carboxylate ligands and 31 N-heterocyclic ligands were calculated at 298.15 K with the B3LYP/6-31+G(d,p) level of calculations, which are useful to understand the water and thermal stability of Metal–Organic Frameworks (MOFs).

Metal–organic frameworks based on bipyridinium carboxylate: photochromism and selective vapochromism

2017 ◽  
Vol 5 (8) ◽  
pp. 2084-2089 ◽  
Author(s):  
Chenghui Zhang ◽  
Libo Sun ◽  
Yan Yan ◽  
Yuchuan Liu ◽  
Zhiqiang Liang ◽  
...  
Keyword(s):  
Metal Organic Frameworks ◽  
Carboxylate Ligands ◽  
Gas Emissions ◽  
Low Concentration ◽  
Metal Organic

Two new photochromic Cd-MOFs based on bipyridinium carboxylate ligands have been synthesized. Interestingly, 1 exhibits vapochromic properties for DEA, possessing rapid, low concentration selectivity and recyclable characteristics for detection of organic gas emissions.

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