Four Cobalt(II)-Containing Coordination Polymers: Effects of pH Value and Temperature on Synthesis, Gas-Sorption, and Magnetic Properties

2014 ◽  
Vol 2014 (36) ◽  
pp. 6205-6211 ◽  
Author(s):  
Yuan-Chun He ◽  
Xiaoying Zhang ◽  
Ying-Ying Liu ◽  
Hai-Yan Liu ◽  
Jian-Fang Ma
Keyword(s):  
Magnetic Properties ◽  
Coordination Polymers ◽  
Synthesis Gas ◽  
Ph Value ◽  
Gas Sorption ◽  
Effects Of Ph

Controllable synthesis of four series of lanthanide coordination polymers: synthesis, structures, luminescent and magnetic properties

CrystEngComm ◽  
2015 ◽  
Vol 17 (43) ◽  
pp. 8289-8299 ◽  
Author(s):  
Ran An ◽  
Xiaofang Wang ◽  
Huai-Ming Hu ◽  
Zhui Zhao ◽  
Chao Bai ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Coordination Polymers ◽  
Glutaric Acid ◽  
Ph Value ◽  
Molar Ratio ◽  
Controllable Synthesis ◽  
Lanthanide Coordination Polymers

Four series of lanthanide coordination polymers based on 2-(2-sulfophenyl)imidazo(4,5-f)(1,10)-phenanthroline and glutaric acid have been hydrothermally synthesized by changing the molar ratio and the pH value.

Biphenyl-2,4,6,3′,5′-pentacarboxylic acid as a tecton for six new Co(ii) coordination polymers: pH and N-donor ligand-dependent assemblies, structure diversities and magnetic properties

2015 ◽  
Vol 44 (33) ◽  
pp. 14673-14685 ◽  
Author(s):  
Min-Le Han ◽  
Liang Bai ◽  
Ping Tang ◽  
Xue-Qian Wu ◽  
Ya-Pan Wu ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Coordination Polymers ◽  
Ph Value ◽  
Donor Ligand

Six new Co(ii) coordination polymers have been synthesized and characterized. The N-donor co-ligands and pH value have an effect on the final structures.

scholarly journals Responsive magnetic coordination polymers: effects of gas sorption

2014 ◽  
Vol 70 (a1) ◽  
pp. C905-C905
Author(s):  
Guillermo Mínguez Espallargas ◽  
Mónica Giménez-Marqués ◽  
Néstor Calvo Galve ◽  
Eugenio Coronado
Keyword(s):  
Magnetic Properties ◽  
Coordination Polymers ◽  
Structural Changes ◽  
Spin Transition ◽  
Chemical Properties ◽  
Internal Cavity ◽  
Gas Sorption ◽  
Covalent Bonds ◽  
Guest Molecules ◽  
Potential Applications

Responsive materials for which physical or chemical properties can be tuned by applying an external stimulus are attracting considerable interest in view of their potential applications as chemical switches or molecular sensors [1]. A major source of such materials is provided by the so-called metal-organic frameworks (MOFs), in which physisorption of guest molecules, located in the pores, can cause subtle changes which affect the magnetic properties. Here we present two different approaches to modify the magnetic properties through gas sorption. First, we show that the chemisorption of gaseous HCl molecules by a non-porous one-dimensional coordination polymer instigates drastic modifications in the magnetic properties of the material, switching from strong antiferromagnets to ferromagnets upon gas sorption [2]. These conversions result from profound structural changes, involving cleavage and formation of covalent bonds caused by the removal/addition of ligands from the framework itself, but with no disruption of crystallinity. In a different approach, we present a family of FeII coordination polymers which shows spin-crossover behaviour and selectively sorbs CO2 over N2 [3]. Despite the lack of permanent channels, these non-porous coordination polymers trap CO2 gas molecules into the internal cavities due to the flexible and dynamic nature of the framework. One CO2 molecule is incorporated in each internal cavity of the crystalline material, as unequivocally demonstrated by structural determination after CO2 loading. This physisorption shifts the spin transition producing an increase in the transition temperature of 9 K (see Figure).

DIP quality influenced by process water quality

TAPPI Journal ◽  
2014 ◽  
Vol 13 (9) ◽  
pp. 51-60
Author(s):  
DENNIS VOSS ◽  
HANS-JOACHIM PUTZ ◽  
SAMUEL SCHABEL
Keyword(s):  
Water Quality ◽  
Surface Tension ◽  
Ph Value ◽  
Water Hardness ◽  
Process Water ◽  
Test Results ◽  
Negative Effects ◽  
Water Parameters ◽  
Effects Of Ph ◽  
Contamination Levels

The need for deinking mills to reduce their fresh water consumption has resulted in higher loads of various contaminants in the process water. Lower recovered paper quality also leads to higher contamination levels in the mills. This higher load has an influence on achievable target brightness. The objective of the work was to determine and explain the main reasons for relatively poor deinked pulp quality or poor deinking potential based on the influence of recovered paper composition and process water quality. The process water parameters significantly affect the deinking potential of recovered paper. The test results showed the negative effects of increased water hardness. For standard recovered paper mixtures, flotation selectivity is higher with increasing flotation pH-value. Good results were realized for standard recovered paper with low hardness, low surface tension, and high pH-value. The results for recovered paper containing flexo newsprint could be slightly improved with low hardness, low surface tension, and low pH-value. The results of the test program using design of experiments showed interacting effects of pH-value and surface tension on luminosity and flotation selectivity.

The Influence of Diamagnetic Substrates Absorption on Magnetic Properties of Porous Coordination Polymers

2013 ◽  
Vol 3 (2) ◽  
pp. 144-160 ◽  
Author(s):  
Sergey Kolotilov ◽  
Mikhail Kiskin ◽  
Igor Eremenko ◽  
Vladimir Novotortsev
Keyword(s):  
Magnetic Properties ◽  
Coordination Polymers ◽  
Porous Coordination Polymers

Effects of pH Value in the Electrolyte on the Properties of Cu2ZnSnS4Thin Film Fabricated by Single Step Co-Electrodeposition

2016 ◽  
Vol 5 (9) ◽  
pp. P521-P525 ◽  
Author(s):  
Hong Zhang ◽  
Shuying Cheng ◽  
Jinling Yu ◽  
Yunfeng Lai ◽  
Haifang Zhou ◽  
...  
Keyword(s):  
Ph Value ◽  
Single Step ◽  
Effects Of Ph
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