Structural tuning of Zn(ii)-MOFs based on pyrazole functionalized carboxylic acid ligands for organic dye adsorption

CrystEngComm ◽  
2020 ◽  
Vol 22 (36) ◽  
pp. 5941-5945 ◽  
Author(s):  
Xiao-Ting Liu ◽  
Si-Si Chen ◽  
Si-Miao Li ◽  
Hong-Xiang Nie ◽  
Yao-Qing Feng ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Selective Adsorption ◽  
Dye Adsorption ◽  
Organic Dye ◽  
Cationic Dyes

Two Zn(ii)-MOFs based on pyrazole functionalized carboxylic ligands have been constructed, which exhibit favorable selective adsorption of organic cationic dyes.

The influence of structural isomerism on fluorescence and organic dye selective adsorption in two complexes based on flexible ligands

2016 ◽  
Vol 45 (38) ◽  
pp. 15060-15066 ◽  
Author(s):  
Wen-Huan Huang ◽  
Jia-Zhi Li ◽  
Lu-Sha Gao ◽  
Yan-Xin Wang ◽  
Shu-Ya Liu ◽  
...  
Keyword(s):  
Coordination Polymers ◽  
Selective Adsorption ◽  
Dye Adsorption ◽  
Adsorption Properties ◽  
Organic Dye ◽  
Structural Isomerism ◽  
Solvent Systems ◽  
Flexible Ligands

Two isomeric coordination polymers were synthesized by different solvent-systems. The complexes exhibited different fluorescence and dye adsorption properties.

scholarly journals Preparation of Fe3O4@polyoxometalates Nanocomposites and Their Efficient Adsorption of Cationic Dyes from Aqueous Solution

Nanomaterials ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 649 ◽  
Author(s):  
Jie Li ◽  
Haiyan Zhao ◽  
Chenguang Ma ◽  
Qiuxia Han ◽  
Mingxue Li ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Selective Adsorption ◽  
Dye Adsorption ◽  
Cationic Dyes ◽  
Blocking Temperature ◽  
Bet Surface Area ◽  
Zero Field ◽  
Adsorption Efficiency ◽  
Xps Spectra ◽  
The Fourier Transform

In this work, two magnetic adsorbents Fe3O4@1 and Fe3O4@2 were prepared by combining Fe3O4 nanoparticles and polyoxometalate hybrids [Ni(HL)2]2H2[P2Mo5O23]·4H2O (1), [H2L]5H[P2Mo5O23]·12H2O (2) (HL = 2-acetylpyridine-thiosemicarbazone). The temperature-dependent zero-field-cooled (ZFC) and field-cooled (FC) measurements indicated the blocking temperature at 160 K and 180 K, respectively. The Brunauer–Emmett–Teller (BET) surface area of Fe3O4@1 and Fe3O4@2 is 8.106 m2/g and 1.787 m2/g, respectively. Cationic dye methylene blue (MB) and anionic dye methyl orange (MO) were investigated for selective dye adsorption on Fe3O4@1 and Fe3O4@2. The two adsorbents were beneficial for selective adsorption of cationic dyes. The adsorption efficiency of MB was 94.8% for Fe3O4@1, 97.67% for Fe3O4@2. Furthermore, the two adsorbents almost maintained the same adsorption efficiency after seven runs. The maximum MB adsorption capacity of Fe3O4@1 and Fe3O4@2 is 72.07 and 73.25 mg/g, respectively. The fourier transform infrared (FT-IR) and X-ray photoelectron spectroscopy (XPS) spectra of the adsorbents collected after adsorption of MB are very similar to the initial as-synthesized Fe3O4@polyoxometalates indicating the high stability of the two adsorbents. The adsorption kinetics indicated that the MB removal followed the pseudo-second-order model. These results showed that the two adsorbents had a potential application in treating wastewater.

Ni(II) based one dimensional coordination polymers for environmental remediation: Design, topology, magnetism and selective adsorption of cationic dyes

CrystEngComm ◽  
2021 ◽  
Author(s):  
M. Shahwaz Ahmad ◽  
Mohd Khalid ◽  
M. Shahnawaz Khan ◽  
M. Shahid ◽  
Musheer Ahmad
Keyword(s):  
Carboxylic Acid ◽  
Coordination Polymers ◽  
Environmental Remediation ◽  
Selective Adsorption ◽  
Cationic Dyes ◽  
Solvothermal Reaction ◽  
One Dimensional ◽  
Remediation Design

Herein, two Ni(II)-based one-dimensional (1D) coordination polymers (CPs), namely, [Ni(Hpdc)(H2O)(H2O)]]n (CP-1) and [Ni(pyc)2(H2O)]n (CP-2), where H3pdc = 3,5-pyrazoledicarboxylic acid and Hpyc = pyraziene-2-carboxylic acid were successfully synthesized under solvothermal reaction...

scholarly journals Visualizing monolayers with a water-soluble fluorophore to quantify adsorption, desorption, and the double layer

2015 ◽  
Vol 112 (8) ◽  
pp. E826-E835 ◽  
Author(s):  
Ian C. Shieh ◽  
Joseph A. Zasadzinski
Keyword(s):  
Double Layer ◽  
Fluorescent Dyes ◽  
Selective Adsorption ◽  
Dye Adsorption ◽  
Immiscible Liquid ◽  
Water Soluble ◽  
Fluorescence Signal ◽  
Anionic Phospholipid ◽  
Gas Phases ◽  
Disordered Phase

Contrast in confocal microscopy of phase-separated monolayers at the air–water interface can be generated by the selective adsorption of water-soluble fluorescent dyes to disordered monolayer phases. Optical sectioning minimizes the fluorescence signal from the subphase, whereas convolution of the measured point spread function with a simple box model of the interface provides quantitative assessment of the excess dye concentration associated with the monolayer. Coexisting liquid-expanded, liquid-condensed, and gas phases could be visualized due to differential dye adsorption in the liquid-expanded and gas phases. Dye preferentially adsorbed to the liquid-disordered phase during immiscible liquid–liquid phase coexistence, and the contrast persisted through the critical point as shown by characteristic circle-to-stripe shape transitions. The measured dye concentration in the disordered phase depended on the phase composition and surface pressure, and the dye was expelled from the film at the end of coexistence. The excess concentration of a cationic dye within the double layer adjacent to an anionic phospholipid monolayer was quantified as a function of subphase ionic strength, and the changes in measured excess agreed with those predicted by the mean-field Gouy–Chapman equations. This provided a rapid and noninvasive optical method of measuring the fractional dissociation of lipid headgroups and the monolayer surface potential.

Synthesis of nano-porous Bi 2 WO 6 hierarchical microcrystal with selective adsorption for cationic dyes

2016 ◽  
Vol 83 ◽  
pp. 387-395 ◽  
Author(s):  
Danjun Wang ◽  
Jie Zhang ◽  
Li Guo ◽  
Xinbo Dong ◽  
Huidong Shen ◽  
...  
Keyword(s):  
Selective Adsorption ◽  
Cationic Dyes
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