Coordination ability of amino acid hydrazide ligands and their influence on magnetic properties in copper(ii) coordination polymers

CrystEngComm ◽  
2018 ◽  
Vol 20 (17) ◽  
pp. 2396-2403 ◽  
Author(s):  
Lidija Androš Dubraja ◽  
Ivanka Jerić ◽  
Andreas Puškarić ◽  
Josip Bronić ◽  
Eufemio Moreno-Pineda
Keyword(s):  
Magnetic Properties ◽  
Amino Acid ◽  
Coordination Polymers ◽  
Acid Hydrazide ◽  
Antiferromagnetic Ordering ◽  
Coordination Ability

Copper(ii) coordination polymers constructed from newly synthesized amino acid hydrazides and 4,4′-bipyridine exhibit antiferromagnetic ordering mediated through hydrazide bridges.

Photoluminescence and Magnetic Properties of Undoped and (Mn, Co) co-doped ZnO Nanoparticles

2020 ◽  
Vol 16 (4) ◽  
pp. 655-666
Author(s):  
Mona Rekaby
Keyword(s):  
Magnetic Properties ◽  
Zno Nanoparticles ◽  
Room Temperature ◽  
Magnetic Measurements ◽  
Structural Defects ◽  
Ferromagnetic Behavior ◽  
Secondary Phases ◽  
Antiferromagnetic Ordering ◽  
Doped Zno ◽  
Co Doped

Objective: The influence of Manganese (Mn2+) and Cobalt (Co2+) ions doping on the optical and magnetic properties of ZnO nanoparticles was studied. Methods: Nanoparticle samples of type ZnO, Zn0.97Mn0.03O, Zn0.96Mn0.03Co0.01O, Zn0.95Mn0.03 Co0.02O, Zn0.93Mn0.03Co0.04O, and Zn0.91Mn0.03Co0.06O were synthesized using the wet chemical coprecipitation method. Results: X-ray powder diffraction (XRD) patterns revealed that the prepared samples exhibited a single phase of hexagonal wurtzite structure without any existence of secondary phases. Transmission electron microscope (TEM) images clarified that Co doping at high concentrations has the ability to alter the morphologies of the samples from spherical shaped nanoparticles (NPS) to nanorods (NRs) shaped particles. The different vibrational modes of the prepared samples were analyzed through Fourier transform infrared (FTIR) measurements. The optical characteristics and structural defects of the samples were studied through Photoluminescence (PL) spectroscopy. PL results clarified that Mn2+ and Co2+ doping quenched the recombination of electron-hole pairs and enhanced the number of point defects relative to the undoped ZnO sample. Magnetic measurements were carried out at room temperature using a vibrating sample magnetometer (VSM). (Mn, Co) co-doped ZnO samples exhibited a ferromagnetic behavior coupled with paramagnetic and weak diamagnetic contributions. Conclusion: Mn2+ and Co2+ doping enhanced the room temperature Ferromagnetic (RTFM) behavior of ZnO. In addition, the signature for antiferromagnetic ordering between the Co ions was revealed. Moreover, a strong correlation between the magnetic and optical behavior of the (Mn, Co) co-doped ZnO was analyzed.

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

Single crystal to single crystal transformation of spin-crossover coordination polymers from 3D frameworks to 2D layers

2021 ◽  
Vol 9 (15) ◽  
pp. 5082-5087
Author(s):  
Yu Gong ◽  
Wang-Kang Han ◽  
Hui-Shu Lu ◽  
Qing-Tao Hu ◽  
Huan Tu ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Single Crystal ◽  
Coordination Polymers ◽  
Ligand Exchange ◽  
Spin Crossover ◽  
Metal Organic Frameworks ◽  
Crystal Transformation ◽  
Metal Organic

New Hofmann-type metal–organic frameworks display rare and complete ligand exchange induced single crystal to single crystal transformations from 3D frameworks to 2D layers, accompanied by magnetic properties transition from two-step SCO behavior to hysteretic SCO behavior.

scholarly journals Two Co(II) coordination polymers: magnetic properties and application values against chronic subdural hematoma

2021 ◽  
Vol 24 (1) ◽  
pp. 199-207
Author(s):  
Jing-Sen Chen ◽  
Sheng-Long Cao ◽  
Hai-Ying Hu ◽  
Juan Shen ◽  
Yu-Jun Qi
Keyword(s):  
Magnetic Properties ◽  
Coordination Polymers ◽  
Subdural Hematoma ◽  
Chronic Subdural Hematoma

scholarly journals Coordination Polymers and Metal Organic Frameworks Derived from 1,2,4-Triazole Amino Acid Linkers

Polymers ◽  
2011 ◽  
Vol 3 (4) ◽  
pp. 1750-1775 ◽  
Author(s):  
Anil D. Naik ◽  
Marinela M. Dîrtu ◽  
Antoine P. Railliet ◽  
Jacqueline Marchand-Brynaert ◽  
Yann Garcia
Keyword(s):  
Amino Acid ◽  
Coordination Polymers ◽  
Metal Organic Frameworks ◽  
Metal Organic

Three-Dimensional Metal Azide Coordination Polymers with Amino Carboxylate Coligands: Synthesis, Structure, and Magnetic Properties

2009 ◽  
Vol 48 (11) ◽  
pp. 4674-4684 ◽  
Author(s):  
Zi-Lu Chen ◽  
Chun-Fang Jiang ◽  
Wei-Hong Yan ◽  
Fu-Pei Liang ◽  
Stuart R. Batten
Keyword(s):  
Magnetic Properties ◽  
Coordination Polymers ◽  
Three Dimensional ◽  
Metal Azide
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