scholarly journals Temperature-dependent interchromophoric interaction in a fluorescent pyrene-based metal–organic framework

2019 ◽  
Vol 10 (24) ◽  
pp. 6140-6148 ◽  
Author(s):  
Andrzej Gładysiak ◽  
Tu N. Nguyen ◽  
Richard Bounds ◽  
Anna Zacharia ◽  
Grigorios Itskos ◽  
...  
Keyword(s):  
Variable Temperature ◽  
Metal Organic Framework ◽  
Temperature Dependent ◽  
Fluorescent Emission ◽  
Metal Organic ◽  
Organic Framework

Variable temperature experiments revealed that the fluorescent emission colour of the pyrene-based SION-7 changes from blue at 80 K to yellow-green at 450 K.

Revealing an unusual temperature-dependent CO2 adsorption trend and selective CO2 uptake over water vapors in a polyamine-appended metal–organic framework

2019 ◽  
Vol 3 (12) ◽  
pp. 2759-2767 ◽  
Author(s):  
Jong Hyeak Choe ◽  
Dong Won Kang ◽  
Minjung Kang ◽  
Hyojin Kim ◽  
Jeoung Ryul Park ◽  
...  
Keyword(s):  
Co2 Adsorption ◽  
Selective Adsorption ◽  
Metal Organic Framework ◽  
Co2 Uptake ◽  
Temperature Dependent ◽  
Water Vapors ◽  
Metal Organic ◽  
Adsorption Of Co ◽  
Unusual Increase ◽  
Organic Framework

Heavily tetraethylenepentamine (tepa)-functionalized Mg2(dobpdc) showed an unusual increase in CO2 uptake on increasing the temperature and selective adsorption of CO2 over water vapors.

Temperature-dependent assemblies from a 2-D triple-stranded meso-helical layer to a 3-D chain-layer metal–organic framework

2012 ◽  
Vol 41 (47) ◽  
pp. 14239 ◽  
Author(s):  
Hong-Guang Jin ◽  
Xu-Jia Hong ◽  
Jing Li ◽  
Yuan-Zhao Yan ◽  
Yi-Ting Liu ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Temperature Dependent ◽  
Metal Organic ◽  
Organic Framework

scholarly journals Framework disorder and its effect on selective hysteretic sorption of a T-shaped azole-based metal–organic framework

IUCrJ ◽  
2019 ◽  
Vol 6 (1) ◽  
pp. 85-95 ◽  
Author(s):  
Sujuan Wang ◽  
Zhang-Wen Wei ◽  
Jianyong Zhang ◽  
Long Jiang ◽  
Dingxin Liu ◽  
...  
Keyword(s):  
Room Temperature ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Structural Disorder ◽  
Gas Sorption ◽  
Temperature Dependent ◽  
Disordered Structure ◽  
Metal Organic ◽  
First Time ◽  
Organic Framework

Metal–organic frameworks with highly ordered porosity have been studied extensively. In this paper, the effect of framework (pore) disorder on the gas sorption of azole-based isoreticular Cu(II) MOFs with rtl topology and characteristic 1D tubular pore channels is investigated for the first time. In contrast to other isoreticular rtl metal–organic frameworks, the Cu(II) metal–organic framework based on 5-(1H-imidazol-1-yl)isophthalate acid has a crystallographically identifiable disordered framework without open N-donor sites. The framework provides a unique example for investigating the effect of pore disorder on gas sorption that can be systematically evaluated. It exhibits remarkable temperature-dependent hysteretic CO2 sorption up to room temperature, and shows selectivity of CO2 over H2, CH4 and N2 at ambient temperature. The unique property of the framework is its disordered structure featuring distorted 1D tubular channels and DMF-guest-remediated defects. The results imply that structural disorder (defects) may play an important role in the modification of the performance of the material.

Zero thermal expansion in metal-organic framework with imidazole dicarboxylate ligands

2021 ◽  
Author(s):  
Qilong Gao ◽  
Yixin Jiao ◽  
Gang Li
Keyword(s):  
Thermal Expansion ◽  
Structural Model ◽  
Layer Structure ◽  
Variable Temperature ◽  
Metal Organic Framework ◽  
Strong Relationship ◽  
Honeycomb Structure ◽  
Axis Direction ◽  
Metal Organic ◽  
Organic Framework

Abstract Exploring new abnormal thermal expansion materials is important to understand the nature of thermal expansion. Metal-Organic Framework (MOF) with unique structure flexibility is ideal material to study the thermal expansion. This work adopts the high-resolution variable-temperature powder X-ray diffraction to investigate the structure and intrinsic thermal expansion in Sr-MOF ([Sr(DMPhH2IDC)2]n). It has the unique honeycomb structure with 1D channels along c-axis direction, the a-b plane displays layer structure. The thermal expansion behavior has strong relationship with the structure, ZTE appears in the a-b plane and large PTE along c-axis direction. The possible mechanism is that the a/b layers have enough space for the transverse thermal vibration of polydentate ligands, while along the c-axis direction is not. This work not only reports one interesting zero thermal expansion material, but also provides new understand for thermal expansion mechanism from the perspective of structural model.

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