3D LnIII-MOFs: slow magnetic relaxation and highly sensitive luminescence detection of Fe3+ and ketones

2018 ◽  
Vol 47 (27) ◽  
pp. 8972-8982 ◽  
Author(s):  
Fei Zhao ◽  
Xiao-Yu Guo ◽  
Zhen-Peng Dong ◽  
Zhi-Liang Liu ◽  
Yan-Qin Wang
Keyword(s):  
Magnetic Relaxation ◽  
Water System ◽  
Luminescence Detection ◽  
System P ◽  
Highly Sensitive ◽  
Slow Magnetic Relaxation ◽  
The Eu

Five Ln-MOFs were obtained: the Dy-MOF shows slow magnetic relaxation, and the Eu-MOF and Tb-MOF show selective and sensitive sensing towards Fe3+ ions and ketones in a water system.

3D LnIII-MOFs: displaying slow magnetic relaxation and highly sensitive luminescence sensing of alkylamines

CrystEngComm ◽  
2019 ◽  
Vol 21 (4) ◽  
pp. 694-702 ◽  
Author(s):  
Hong Huang ◽  
Wei Gao ◽  
Xiu-Mei Zhang ◽  
Ai-Mei Zhou ◽  
Jie-Ping Liu
Keyword(s):  
Magnetic Relaxation ◽  
Water Systems ◽  
3D Structures ◽  
Highly Sensitive ◽  
Slow Magnetic Relaxation ◽  
Solvothermal Conditions

Six isomorphous Ln-based MOFs with 3D structures have been synthesized under solvothermal conditions. Dy-MOF (5) shows slow magnetic relaxation behaviors. Eu-MOF (3) can serve as a recyclable sensor towards alkylamines in water systems.

scholarly journals Slow magnetic relaxation in a {EuCu5} metallacrown

2019 ◽  
Vol 48 (5) ◽  
pp. 1686-1692 ◽  
Author(s):  
Jin Wang ◽  
Ze-Yu Ruan ◽  
Quan-Wen Li ◽  
Yan-Cong Chen ◽  
Guo-Zhang Huang ◽  
...  
Keyword(s):  
Ground State ◽  
Magnetic Relaxation ◽  
Relaxation Rates ◽  
Slow Magnetic Relaxation ◽  
The Eu

A {EuIIICu5} metallacrown displays field-induced slow magnetic relaxation, in which the EuIII with diamagnetic ground state enhances the relaxation rates.

Two isostructural Ln-MOFs showing luminescent sensing (Eu) and slow magnetic relaxation (Dy) properties

2018 ◽  
Vol 47 (44) ◽  
pp. 15656-15660 ◽  
Author(s):  
Chun Yang ◽  
Jie-Yu Zheng ◽  
Wen-Jing Cai ◽  
Fu-Sheng Guo ◽  
Yao-Yu Wang
Keyword(s):  
Energy Barrier ◽  
Magnetic Relaxation ◽  
Luminescence Properties ◽  
Ion Detection ◽  
Slow Magnetic Relaxation ◽  
The Eu ◽  
Luminescent Sensing

Two isostructural lanthanide-based MOFs are reported. The Eu-MOF exhibiting luminescence properties can be utilized in ion detection and the Dy-MOF displays SMM behavior with an energy barrier (ΔUeff) of 54 K.

Water-stable LnIII-based coordination polymers displaying slow magnetic relaxation and luminescence sensing properties

2020 ◽  
Vol 44 (17) ◽  
pp. 6747-6759 ◽  
Author(s):  
Wei Gao ◽  
Ai-Mei Zhou ◽  
Han Wei ◽  
Cui-Li Wang ◽  
Jie-Ping Liu ◽  
...  
Keyword(s):  
Coordination Polymers ◽  
Magnetic Relaxation ◽  
Aqueous System ◽  
Sensing Properties ◽  
System P ◽  
Slow Magnetic Relaxation

Six Ln-CPs were synthesized: Dy-CP shows slow magnetic relaxation, and Eu-CP and Tb-CP exhibit recyclable and multi-responsive sensing for Fe3+, MnO4−, CrVI-anions (CrO42−, Cr2O72−) and TNP in an aqueous system.

Correlating the axial Zero Field Splitting with the slow magnetic relaxation in GdIII SIMs

2021 ◽  
Author(s):  
Júlia Mayans ◽  
Albert Escuer
Keyword(s):  
Magnetic Relaxation ◽  
Zero Field ◽  
Zero Field Splitting ◽  
Field Splitting ◽  
Slow Magnetic Relaxation

A possible relation between the value of the axial Zero Field Splitting and the occurrence of field-induced slow magnetic relaxation has been established for a new gadolinium(iii) compound.

Temporal variability of disinfection by-products concentration in urban public water system

2013 ◽  
Vol 14 (4) ◽  
pp. 393-398
Keyword(s):  
Drinking Water ◽  
Water Samples ◽  
Temporal Variability ◽  
Water System ◽  
The Other ◽  
Major Constituent ◽  
System P ◽  
Public Water System ◽  
Drinking Water Samples ◽  
By Products

The occurrence of trihalomethanes (THMs) was studied in the drinking water samples from urban water supply network of Karachi city that served more than 18 million people. Drinking water samples were collected from 58 locations in summer (May-August) and winter (November-February) seasons. The major constituent of THMs detected was chloroform in winter (92.34%) and summer (93.07%), while the other THMs determined at lower concentrations. Summer and winter concentrations of total THMs at places exceed the levels regulated by UEPA (80 μg l-1) and WHO (100 μg l-1). GIS linked temporal variability in two seasons showed significantly higher median concentration (2.5%-23.06%) of THMs compared to winter.

Insights into the electrochemical degradation of phenolic lignin model compounds in protic ionic liquid-water system

2021 ◽  
Author(s):  
Guangyong Liu ◽  
Qian Wang ◽  
Dongxia Yan ◽  
Yaqin Zhang ◽  
Chenlu Wang ◽  
...  
Keyword(s):  
Water System ◽  
Value Added ◽  
Electrochemical Degradation ◽  
Aryl Ether ◽  
Model Compounds ◽  
Protic Ionic Liquid ◽  
Lignin Model Compounds ◽  
Mild Conditions ◽  
System P ◽  
Lignin Model

Cleavage of aryl ether (Caryl-O) bonds is crucial for conversion and value-added utilization of lignin and its derivatives, but remains extremely challenging under mild conditions due to strong Caryl-O linkages....

Slow magnetic relaxation in dinuclear dysprosium and holmium phenoxide bridged complexes: a Dy2 single molecule magnet with a high energy barrier

2021 ◽  
Author(s):  
Matilde Fondo ◽  
Julio Corredoira-Vázquez ◽  
Ana M. Garcia-Deibe ◽  
Jesus Sanmartin Matalobos ◽  
Silvia Gómez-Coca ◽  
...  
Keyword(s):  
Crystal Structures ◽  
Single Molecule ◽  
Energy Barrier ◽  
Magnetic Relaxation ◽  
High Energy ◽  
Single Molecule Magnet ◽  
High Energy Barrier ◽  
Slow Magnetic Relaxation

Dinuclear [M(H3L1,2,4)]2 (M = Dy, Dy2; M = Ho, Ho2) complexes were isolated from an heptadentate aminophenol ligand. The crystal structures of Dy2·2THF, and the pyridine adducts Dy2·2Py and Ho2·2Py,...

scholarly journals Reciprocating Thermal Behavior in Multichannel Relaxation of Cobalt(II) Based Single Ion Magnets

2021 ◽  
Vol 7 (6) ◽  
pp. 76
Author(s):  
Cyril Rajnák ◽  
Ján Titiš ◽  
Roman Boča
Keyword(s):  
Thermal Behavior ◽  
Magnetic Relaxation ◽  
Additional Term ◽  
Negative Temperature ◽  
Point Of View ◽  
Magnetic Data ◽  
Phonon Bottleneck ◽  
Slow Magnetic Relaxation ◽  
Relaxation Channel ◽  
Frequency Relaxation

A series of mononuclear Co(II) complexes showing slow magnetic relaxation is assessed from the point of view of relaxation mechanisms. In certain cases, the reciprocating thermal behavior is detected: On cooling, the slow relaxation time is prolonged until a certain limit and then, unexpectedly, is accelerated. The low-temperature magnetic data can be successfully fitted by assuming Raman and/or phonon bottleneck mechanisms of the slow magnetic relaxation for the high-frequency relaxation channel. An additional term with the negative temperature exponent is capable of reproducing the whole experimental dataset.

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