Feb 1, 2019 · Herein we report EPR spectroscopic study of Ni (I) species formed in the LNiBr 2 /MMAO/C 2 H 4 catalyst system and discuss their possible role in ethylene polymerization.

EPR spectroscopy is used to study the nature of unpaired (paramagnetic) electrons in a given system, based on transitions between their spin states. Since electrons are charged particles, their natural spins (often denoted as +1/2 (high spin) and –½ (low spin)) generate magnetic fields.

Dec 15, 2012 · Single crystal EPR studies of Ni(II) in hexaimidazolecobalt(II) dichloride tetrahydrate have been carried out at ambient temperature to obtain g and zero-field tensors, making it one of the very few systems having room temperature EPR data.

The nature of the chemical bonding between NO and open-shell Ni II ions docked in a metal–organic framework is fully characterized by EPR spectroscopy and computational methods. High-frequency EPR experiments reveal the presence of …

Oct 1, 2021 · Ni (II) ion was studied using EPR spectroscopy at 300 K; it is one of the very few systems with room temperature EPR data. Optical absorption studies suggest that the Ni (II) center has trigonal symmetry, which confirms the EPR data.

Apr 26, 2007 · Electron paramagnetic resonance (EPR) spectroscopy deals not only with the electronic structure of paramagnetic centres, but also with their local environments. This assertion is referred to paramagnetic ions both in magnetically diluted and concentrated systems.

Loubser and van Rynevald found an EPR line with a g value of 2.0310+0.0005 in synthetic polycrystalline dia-mond grown from a metal melt containing Ni. Since the signal was absent in samples grown from a melt without Ni, it was assigned to Ni.

Dec 2, 2021 · The EPR spectrum of the polycrystalline Ni/Zn(pyrazole) 6 (NO 3) 2 [Ni/ZPN] shows a triplet spectrum indicating D < H o. A detailed analysis of single-crystal EPR data yielded the spin Hamiltonian parameters.

Sep 24, 2013 · These photo-generated species were detected and characterized by low temperature electron paramagnetic resonance (EPR) spectroscopy. Relative spin concentrations of the photogenerated paramagnetic species (Ni n+ …

Jan 1, 2015 · EPR spectroscopy is used to study catalytic hydration and polymerization reaction systems based on α-diimine complexes of Ni (0) and Ni (II) with the general formula NiBr 2 (DAD–R) (R = –C 3 H 7 or –CH 3) or Ni (DAD–CH 3) 2 (DAD (–C 3 H 7) = 1,4-bis (2,6-diiso-propylphenyl)-2,3- (dimethyl-1,4-diazabuta-1,3-diene, DAD (–CH 3) = 1,4-bis (2,6-dimet...