Two d10 Metal–Organic Frameworks as Low-Temperature Luminescent Molecular Thermometers

2018 ◽  
Vol 18 (12) ◽  
pp. 7383-7390 ◽  
Author(s):  
Yan-Jie Qi ◽  
Yong-Jiang Wang ◽  
Xin-Xiong Li ◽  
Dan Zhao ◽  
Yan-Qiong Sun ◽  
...  
Keyword(s):  
Low Temperature ◽  
Metal Organic Frameworks ◽  
D10 Metal ◽  
Molecular Thermometers ◽  
Metal Organic

scholarly journals Four Novel d10 Metal-Organic Frameworks Incorporating Amino-Functionalized Carboxylate Ligands: Synthesis, Structures, and Fluorescence Properties

2021 ◽  
Vol 9 ◽  
Author(s):  
Wang Xie ◽  
Jie Wu ◽  
Xiaochun Hang ◽  
Honghai Zhang ◽  
Kang shen ◽  
...  
Keyword(s):  
Metal Organic Frameworks ◽  
Three Dimensional ◽  
Fluorescence Properties ◽  
Gravimetric Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Quenching Effect ◽  
D10 Metal ◽  
Metal Organic ◽  
Point Symbol

By employment of amino-functionalized dicarboxylate ligands to react with d10 metal ions, four novel metal-organic frameworks (MOFs) were obtained with the formula of {[Cd(BCPAB)(μ2-H2O)]}n (1), {[Cd(BDAB)]∙2H2O∙DMF}n (2), {[Zn(BDAB)(BPD)0.5(H2O)]∙2H2O}n (3) and {[Zn(BDAB)(DBPB)0.5(H2O)]∙2H2O}n (4) (H2BCPAB = 2,5-bis(p-carbonylphenyl)-1-aminobenzene; H2BDAB = 1,2-diamino-3,6-bis(4-carboxyphenyl)benzene); BPD = (4,4′-bipyridine); DBPB = (E,E-2,5-dimethoxy-1,4-bis-[2-pyridin-vinyl]-benzene; DMF = N,N-dimethylformamide). Complex 1 is a three-dimensional (3D) framework bearing seh-3,5-Pbca nets with point symbol of {4.62}{4.67.82}. Complex 2 exhibits a 4,4-connected new topology that has never been reported before with point symbol of {42.84}. Complex 3 and 4 are quite similar in structure and both have 3D supramolecular frameworks formed by 6-fold and 8-fold interpenetrated 2D coordination layers. The structures of these complexes were characterized by single crystal X-ray diffraction (SC-XRD), thermal gravimetric analysis (TGA) and powder X-ray diffraction (PXRD) measurements. In addition, the fluorescence properties and the sensing capability of 2–4 were investigated as well and the results indicated that complex 2 could function as sensor for Cu2+ and complex 3 could detect Cu2+ and Ag+via quenching effect.

Atmospheric low-temperature plasma for direct post-synthetic modification of UiO-66

2020 ◽  
Vol 56 (43) ◽  
pp. 5803-5806
Author(s):  
Juan He ◽  
Fujian Xu ◽  
Yunfei Tian ◽  
Chenghui Li ◽  
Xiandeng Hou
Keyword(s):  
Low Temperature ◽  
Hydroxy Group ◽  
Metal Organic Frameworks ◽  
Low Temperature Plasma ◽  
Temperature Plasma ◽  
Modification Method ◽  
Metal Organic

A low-temperature plasma-based post-synthetic modification method was developed to directly introduce the hydroxy group into UiO-66 metal–organic frameworks (MOFs).

Low-temperature and highly sensitivity H2S gas sensor based on ZnO/CuO composite derived from bimetal metal-organic frameworks

2020 ◽  
Vol 46 (10) ◽  
pp. 15858-15866 ◽  
Author(s):  
Xu Wang ◽  
Sihan Li ◽  
Lili Xie ◽  
Xia Li ◽  
Donghai Lin ◽  
...  
Keyword(s):  
Low Temperature ◽  
Gas Sensor ◽  
Metal Organic Frameworks ◽  
H2s Gas Sensor ◽  
Metal Organic

scholarly journals Mechanistic studies on the conversion of NO gas on urea-iron and copper metal organic frameworks at low temperature conditions: in situ infrared spectroscopy and Monte Carlo investigations

2021 ◽  
Author(s):  
Ahmed Eid ◽  
Mohammad Aminur Rahman ◽  
Hind A. Al-Abadleh
Keyword(s):  
Monte Carlo ◽  
Infrared Spectroscopy ◽  
Low Temperature ◽  
Catalytic Reduction ◽  
Metal Organic Frameworks ◽  
Chemical Properties ◽  
Surface Species ◽  
Temperature Conditions ◽  
Metal Organic

Nitrogen oxides (NOx) emissions from high temperature combustion processes under fuel-lean conditions continue to be a challenge for the energy industry. Selective catalytic reduction (SCR) has been possible with metal oxides and zeolites. There is still the need to identify catalytic materials that are efficient in reducing NOx to environmentally benign nitrogen gas at temperatures lower than 200°C. Metal-organic frameworks (MOFs) emerged as a class of highly porous materials with unique physical and chemical properties. This study is motivated by the lack of systematic investigations on SCR using MOFs under industrially-relevant conditions. Here, we investigate the extent of NO conversion with two commercially-available MOFs; Basolite F300 (Fe-BTC) and HKUST-1 (Cu-BTC), mixed with solid urea as a source for the reductant, ammonia gas. For comparison, experiments were also conducted using cobalt ferrite (CoFe2O4) as a non-porous counterpart to relate its reactivity to those obtained from MOFs. Fourier-transform infrared spectroscopy (FTIR) was utilized to identify gas and surface species the temperature range 115 -180°C. Computational analysis was performed using Monte Carlo (MC) simulations to quantify adsorption energies of different surface species. The results show that the rate of ammonia production from the in situ solid urea decomposition was higher using CoFe2O4 than Fe-BTC and Cu-BTC, and that there is very limited conversion of NO on the mixed solid urea-MOF systems due to site blocking. The main conclusions from this study is that MOFs have limited abilities in converting NO under low temperature conditions, and that surface regeneration requires additional experimental steps.

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