A5056818825- Magnetism in coordination complexes
- Lanthanide and Transition Metal Complexes
- Molecular Junctions and Nanostructures
- Porphyrin and Phthalocyanine Chemistry
- Electron Spin Resonance Studies
- Metal-Catalyzed Oxygenation Mechanisms
- Metal complexes synthesis and properties
- Conducting polymers and applications
- Chalcogenide Semiconductor Thin Films
- Thermodynamic properties of mixtures
- Biochemical effects in animals
- Organic and Molecular Conductors Research
- Chemical and Physical Properties in Aqueous Solutions
- Organic Light-Emitting Diodes Research
- Advanced Semiconductor Detectors and Materials
- Rare-earth and actinide compounds
- Islamic Finance and Banking Studies
- MXene and MAX Phase Materials
- Radioactive element chemistry and processing
- GABA and Rice Research
- Financial Markets and Investment Strategies
- 2D Materials and Applications
- Corrosion Behavior and Inhibition
- Substance Abuse Treatment and Outcomes
- Inorganic Chemistry and Materials
University of Nebraska–Lincoln
2020-2025
Berry College
2023
Tribhuvan University
2021-2022
Abstract From a comparison of the known molecular stoichiometry and X-ray photoemission spectroscopy (XPS), it is evident that Fe(III) spin crossover salt [Fe(qsal)2Ni(dmit)2], where qsal = N(8quinolyl)salicylaldimine, dmit2− 1,3-dithiol-2-thione-4,5-dithiolato has preferential surface termination with Ni(dmit)2 moiety. This leads to significant bulk core level shift for Ni 2p level, not seen in corresponding Fe spectra. A similar Pd 3d related [Fe(qsal)2]2Pd(dmit)2, ],...
From X-ray absorption spectroscopy (XAS) and photoemission (XPS), it is evident that the spin state transition behavior of Fe(II) crossover coordination polymer crystallites at surface differs from bulk. A comparison four different polymers reveals observed properties may differ bulk for a variety reasons. There are with either almost complete switching or no all. Oxidation, differences in packing, changes could all contribute to making very Some be sufficiently photoactive so spectroscopies...
Abstract Adding Fe 3 O 4 nanoparticles to composites of [Fe(Htrz) 2 (trz)](BF ) spin-crossover polymer and polyaniline (PANI) drives a phase separation both restores the molecular structure cooperative effects without compromising increased conductivity gained through addition PANI. We observe an on-off ratio for DC owing enlarged off state resistivity 20 times larger AC on compared with values. The nanoparticles, primarily confined phase, are ferromagnetically coupled local moment molecule...
For the spin crossover coordination polymer [Fe(L1)(bipy)]<sub>n</sub> (where L1 is a N<sub>2</sub>O<sub>2</sub><sup>2−</sup> coordinating Schiff base-like ligand bearing phenazine fluorophore and bipy = 4,4′-bipyridine), there compelling additional evidence of state transition.
The X-ray-induced spin crossover transition of an Fe (II) molecular thin film in the presence and absence a magnetic field has been investigated. thermal activation energy barrier soft X-ray for [Fe{H2B(pz)2}2(bipy)] films is reduced applied field, as measured through absorption spectroscopy at various temperatures. influence 1.8 T sufficient to cause deviations from expected exponential state behavior which free case. We find that orbital moment diminishes with increasing temperature,...
Few-layered HfS 3 nanoribbons exhibit n-type conductivity and a large photoresponse to visible light. The photocurrent strongly depends on the polarization direction of excitation laser due highly anisotropic quasi-1D crystal structure .
The [Co(SQ)2(4-CN-py)2] complex exhibits dynamical effects over a wide range of temperature. orbital moment, determined by X-ray magnetic circular dichroism (XMCD) with decreasing applied field, indicates nonzero critical field for net alignment moments, an effect not seen the spin moment [Co(SQ)2(4-CN-py)2].
A joint spectroscopy and ab initio study identifies electronic orbitals of valence tautomeric complexes on different semiconducting polymers, including a spin-polarized ligand-to-metal charge transfer state that spans the entire molecular plane.
Abstract X-ray Photoelectron Spectroscopy (XPS) has been used to study the interactions of heavy metal ions with DNA some success. Surface sensitivity and selectivity XPS are advantageous for identifying characterizing chemical elemental structure interaction. This review summarizes status what amounts a large part photoemission investigations biomolecule metals offers insight into mechanism metal-bio interface interactions. Specifically, it is seen that interaction results in conformational...
In this study, the structure and transport properties of two polymorphs, nanoparticles nanorods, iron(II) triazole [Fe(Htrz)
The X-ray induced spin crossover transition of an Fe(II) molecular thin film in the presence and absence a magnetic field has been investigated. thermal activation energy barrier soft for [Fe{H2B(pz)2}2(bipy)] films is reduced applied field, as measured through absorption spectroscopy at various temperatures. influence 1.8 T sufficient to cause deviations from expected exponential state behavior that free case. We find orbital moment diminishes with increasing temperature, relative vicinity...
The example of spin crossover molecule $[\mathrm{F}\mathrm{e}(\mathrm{H}\mathrm{t}\mathrm{r}\mathrm{z})(\mathrm{t}\mathrm{r}\mathrm{z})](\mathrm{B}\mathrm{F}_{4})$ (where Htrz $=$ IH-1,2,4-triazo1e) plus polyaniline composite thin films is used to illustrate the rapid improvement in transport properties signaling that competitive molecular devices for back end line (BEOL) silicon compatible nonvolatile memory arrays are increasing realistic.
From a comparison of energy dispersive analyses X-rays (EDAX), the known molecular stoichiometry and X-ray photoemission spectroscopy (XPS), it is evident that Fe(III) spin crossover salt [Fe(qsal)2Ni(dmit)2] has preferential surface termination with Ni(dmit)2 moiety. This leads to significant bulk core level shift for Ni 2p level, not seen in corresponding Fe spectra. Inverse (IPES), thus provides some indication density states resulting from dmit2 = 1,3-dithiol-2-thione-4,5-dithiolato...
The bistability and the conductivity changes associated with optical excitations in cobalt valence tautomer molecular thin films were investigated.
Evidence of chirality was observed at the Fe metal center in Fe(III) spin crossover coordination salts [Fe(qsal)2][ Ni(dmit)2] and [Fe(qsal)2](TCNQ)2 from X-ray absorption spectroscopy 2p3/2 core threshold. This indicates formation chiral domains that influence octahedral on core.
Abstract Evidence of chirality was observed at the Fe metal center in Fe(III) spin crossover coordination salts [Fe(qsal) 2 Ni(dmit) ] and (TCNQ) from X-ray absorption spectroscopy 2p 3/2 core threshold. Based on circularly polarized data, natural circular dichroism seen is far stronger than for Cl] suggesting this signature a ligand effect rather result just loss octahedral symmetry core. The larger chiral effects to bound absorption, greater perturbation 1/2 spin-orbit splitting spectra.&#xD;
The coordination chemistry of uranyl ions with surface immobilized peptides was studied using X-ray photoemission spectroscopy (XPS). All the in study were modified a six-carbon alkanethiol as linker on gold substrate methylene blue redox label. spectra reveal that each peptide interacts differently ion. For all peptides, XPS taken both absence and presence uranium, their comparison reveals interaction depends chemical group present peptides. results show that, among current study,...
Abstract In this work, we provide clear evidence of magnetic anisotropy in the local orbital moment a molecular thin film based on SCO complex [Fe(H 2 B(pz) ) (bipy)] (pz = pyrazol−1−yl, bipy 2,2′−bipyridine). Field dependent x-ray circular dichroism measurements indicate that easy axis for is along surface normal direction. Along with presence critical field, our observation points to existence an anisotropic energy barrier high-spin state. The estimated nonzero coupling constant ∼2.47 × 10...
In view of recent global and domestic events like Brexit, terrorists attacks in Europe, Syrian crisis, Economic Protectionist policy calls USA, slow growth the Chinese economy, Demonetization currencies India among others, volatility Indian markets has increased last one year, 2015–16. This impacted fund returns short run, even different categories funds. Hence, present study aim to evaluate performance using Sharpe ratio, Treynor Ratio, Jensen's alpha Fama's net selectivity models daily Net...
In the present work, molecular dynamics study of diffusion Gamma Aminobutyric acid in water at different temperatures 298.2 K, 303.2 313.2 323.2 333.2 K have been performed. The solute and solvent is modeled using OPLS AA platform. structure system analyzed RDF atom or molecule pairs. all cases, least two more peaks were obtained which suggests appreciable amount interaction between atoms molecules. self coefficient GABA calculated from mean square displacement (MSD) plot Einstein's...