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Your search keyword '"Asma Amjad"' showing total 2 results
Start Over Author "Asma Amjad" Journal inorganic chemistry
2 results on '"Asma Amjad"'

1. Water-Stable Manganese(IV) Complex of a N2O4-Donor Non-Schiff-Base Ligand: Synthesis, Structure, and Multifrequency High-Field Electron Paramagnetic Resonance Studies

Author

Mainak Debnath, Malay Dolai, Mahammad Ali, Johan van Tol, Enrique del Barco, and Asma Amjad

Subjects
Models, Molecular, Crystallography, Schiff base, Molecular Structure, Spin states, Ligand, Inorganic chemistry, Water, chemistry.chemical_element, Manganese, Ligands, law.invention, Ion, Inorganic Chemistry, chemistry.chemical_compound, Manganese Compounds, chemistry, law, Nitrogen Oxides, Physical and Theoretical Chemistry, Anisotropy, Electron paramagnetic resonance, Single crystal
Abstract

A novel water-stable (t1/2 ∼ 6.8 days) mononuclear manganese(IV) complex of a hexacoordinating non-Schiff-base ligand (H4L) with N2O4-donor atoms has been synthesized and characterized crystallographically. High-frequency electron paramagnetic resonance experiments performed on a single crystal reveal a manganese(IV) ion with an S = 3/2 ground spin state that displays a large single-ion anisotropy, setting the record of mononuclear manganese(IV) complexes reported so far. In addition, spin-echo experiments reveal a spin-spin relaxation time T2 ∼ 500 ns.

Published
2014

2. Large spin-state changes in isostructural cyanate- and azide-bridged Mn(3)(III)Mn(2)(II) single-molecule magnets

Author

David N. Hendrickson, Gavin Ogawa, Patrick L. Feng, Casey J. Stephenson, Asma Amjad, and Enrique del Barco

Subjects
Spin states, Condensed matter physics, Magnetization reversal, Cyanate, Inorganic Chemistry, chemistry.chemical_compound, Magnetization, Crystallography, chemistry, Magnet, Molecule, Azide, Physical and Theoretical Chemistry, Isostructural
Abstract

We prepared three structurally related Mn(3)(III)Mn(2)(II) complexes that possess S approximately 1-11 spin ground states as a result of variations in the geometry and identity of mu(2)-eta(1):eta(1) bridging groups. These complexes function as single-molecule magnets yet demonstrate other interesting behavior such as quasi-classical magnetization hysteresis and comparable magnetization reversal barriers (U(eff)).

Published
2010

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