Room Temperature Electron Paramagnetic Resonance Research Articles

Abstract Tu123: Redox Biology of the Mitochondrial Protein mitoNEET and Ascorbate

Background: It has been proposed that mitoNEET is an Fe-S transfer/repair enzyme, playing a role under conditions of oxidative stress. mitoNEET protects mitochondria against oxidative stress in cardiomyocytes. Loss of mitoNEET is linked with age-related heart failure. Oxidized mitoNEET, [2Fe-2S] 2+ , exports Fe-S cluster from mitochondria to cytosol. Redox control of mitochondrion is essential for the proper functioning of the organelle/mitochondria. However, the molecular mechanisms involved in the redox biology of mitoNEET is not fully studied. Hypothesis: Ascorbate regulates redox reactions and Fe-S cluster transport function of mitoNEET in the mitochondria. Aims: The objective of this work is to evaluate the redox reactions between mitoNEET and ascorbate. Methods: Room temperature and low temperature (77 K) electron paramagnetic resonance (EPR) spectroscopy techniques were used to measure the oxidation of ascorbate and reduced mitoNEET, respectively. Results: EPR spectroscopic study shows that mitoNEET oxidizes ascorbate to ascorbate radical. The formation of ascorbate radical increases with increasing concentration of ascorbate. The formation of ascorbate radical is decreased in the presence of menadione. Low temperature EPR study shows that one electron reduction of mitoNEET by ascorbate. Conclusion: This study suggest that ascorbate is a substrate/cofactor for mitoNEET. Ascorbate regulates the Fe-S cluster transport function of mitoNEET. Ascorbate plays an important role in the redox biology of mitoNEET under physiological and pathophysiological conditions.

The Dynamic Plasticity of P. aeruginosa CueR Copper Transcription Factor upon Cofactor and DNA Binding.

Bacteria use specialized proteins, like transcription factors, to rapidly control metal ion balance. CueR is a Gram-negative bacterial copper regulator. The structure of E. coli CueR complexed with Cu(I) and DNA was published, since then many studies have shed light on its function. However, P. aeruginosa CueR, which shows high sequence similarity to E. coli CueR, has been less studied. Here, we applied room-temperature electron paramagnetic resonance (EPR) measurements to explore changes in dynamics of P. aeruginosa CueR in dependency of copper concentrations and interaction with two different DNA promoter regions. We showed that P. aeruginosa CueR is less dynamic than the E. coli CueR protein and exhibits much higher sensitivity to DNA binding as compared to its E. coli CueR homolog. Moreover, a difference in dynamical behavior was observed when P. aeruginosa CueR binds to the copZ2 DNA promoter sequence compared to the mexPQ-opmE promoter sequence. Such dynamical differences may affect the expression levels of CopZ2 and MexPQ-OpmE proteins in P. aeruginosa. Overall, such comparative measurements of protein-DNA complexes derived from different bacterial systems reveal insights about how structural and dynamical differences between two highly homologous proteins lead to quite different DNA sequence-recognition and mechanistic properties.

Electron Paramagnetic Resonance Spectra of Pentagonal Bipyramidal Gadolinium Complexes

Gadolinium is a special case in spectroscopy because of the near isotropic nature of the 4f7 configuration of the +3 oxidation state. Gd3+ complexes have been studied in several symmetries to understand the underlying mechanisms of the ground state splitting. The abundance of information in Gd3+ spectra can be used as a probe for properties of the other rare earth ions in the same complexes. In this work, the zero-field splitting (ZFS) of a series of Gd3+ pentagonal bipyramidal complexes of the form [GdX1X2(Leq)5]n+ [n = 1, X = axial ligands: Cl-, -OtBu, -OArF5 or n = 3, X = tBuPO(NHiPr)2, Leq = equatorial ligand: Py, THF or H2O] with near fivefold symmetry axes along X1-Gd-X2 was investigated. The ZFS parameters were determined by fitting of room-temperature continuous wave electron paramagnetic resonance (EPR) spectra (at X-, K-, and Q-band) to a spin Hamiltonian incorporating extended Stevens operators compatible with C5 symmetry. Examination of the acquired parameters led to the conclusion that the ZFS is dominated by the B20 term and that the magnitude of B20 is almost entirely dependent on, and inversely proportional to, the donor strength of the axial ligands. Surveying the continuous shape measure and the X1-Gd-X2 angle of the complexes showed that there is some correlation between the proximity of each complex to D5h symmetry and the magnitude of the B65 parameter, but that the deformation of the X1-Gd-X2 angle is more significant than other distortions. Finally, the magnitude of B20 was found to be inversely proportional to the thermal barrier for the reversal of the magnetic moment (Ueff) of the corresponding isostructural Dy3+ complexes.

Spirobifluorene Mediating the Spin–Spin Coupling of Nitronyl Nitroxide Diradicals

To investigate the mechanism of this spiro conjugation magnetic behavior, we designed and synthesized three diradicals─22'SBF-NN, 44'SBF-NN, and 27SBF-NN. They are bridged by spirobifluorene and nitronyl nitroxide (NN) diradicals as the spin centers. Notably, by SQUID and electron paramagnetic resonance (EPR) zero-field splitting data analyses, the 22'SBF-NN and 27SBF-NN diradicals exhibit intramolecular, distinctly antiferromagnetic (AF) coupling, with 2J(22'SBF-NN)/kB = -5.86 K and 2J(27SBF-NN)/kB = -24.6 K, respectively. The AF of 22'SBF-NN is opposite to that predicted by the spin density alternation rule based on Hund's rule. Diradical intramolecular conjugation coupling bridged by spiro-carbon conjugation is discussed, in which the 22'SBF-NN is smaller than that of 27SBF-NN, corresponding to the room-temperature EPR characterization. This spiro conjugation is weaker than the traditional planar conjugation and generally leads to a weaker spin-spin coupling in the helical biradical molecule. The EPR spectrum of the 44'SBF-NN diradical shows a deformed nine-line curve, indicating intramolecular exchange coupling. The density functional theory calculation gives a very weak coupling constant of 2Jcalc/kB = 0.06 K, with ferromagnetic (FM) interaction as the proof, which is consistent with the spin-polarized prediction. Further analysis of magnetic susceptibility χm and VT-EPR data shows that there is indeed an extremely weak FM interaction in the 44' position diradical. We find the bridge, which is a 44' substituted SBF structure, blocks the conjugation and contains a larger twist in steric hindrance, which also hampers sufficient spin density delocalization, resulting in a much weaker spin coupling interaction. Combined with the analysis of molecular orbital calculation results, the anomalous intramolecular AF coupling mechanism of 22'SBF-NN is further explained.

Allostery-driven changes in dynamics regulate the activation of bacterial copper transcription factor.

Metalloregulators bind and respond to metal ions by regulating the transcription of metal homeostasis genes. Copper efflux regulator (CueR) is a copper‐responsive metalloregulator that is found in numerous Gram‐negative bacteria. Upon Cu(I) coordination, CueR initiates transcription by bending the bound DNA promoter regions facilitating interaction with RNA polymerase. The structure of Escherichia coli CueR in presence of DNA and metal ion has been reported using X‐ray crystallography and cryo‐EM, providing information about the mechanism of action. However, the specific role of copper in controlling this transcription mechanism remains elusive. Herein, we use room temperature electron paramagnetic resonance (EPR) experiments to follow allosterically driven dynamical changes in E. coli CueR induced by Cu(I) binding. We suggest that more than one Cu(I) ion binds per CueR monomer, leading to changes in site‐specific dynamics at the Cu(I) binding domain and at the distant DNA binding site. Interestingly, Cu(I) binding leads to an increase in dynamics about 27 Å away at the DNA binding domain. These changes in the dynamics of the DNA binding domain are important for exact coordination with the DNA. Thus, Cu(I) binding is critical to initiate a series of conformational changes that regulate and initiate gene transcription.Broad audience statementThe dynamics of metal transcription factors as a function of metal and DNA binding are complex. In this study, we use EPR spectroscopy to measure dynamical changes of Escherichia coli CueR as a function of copper and DNA binding. We show that copper controls the activation of the transcription processes by initiation a series of dynamical changes over the protein.

Strain-Assisted Single Pt Sites on High-Curvature MoS 2 Surface for Ultrasensitive H 2 S Sensing

Strain-Assisted Single Pt Sites on High-Curvature MoS ₂ Surface for Ultrasensitive H ₂ S Sensing

Dielectric and electron spin resonance studies of (x)NiFe2O4 + (1-x)BaTiO3 (0 ≤ x ≤ 1) magnetoelectric composites

In this paper, the magnetoelectric coupling in (x)NiFe2O4 + (1-x)BaTiO3 (0 ≤ x ≤ 1) particulate composites has been demonstrated by investigating dielectric and electron spin resonance properties. The effect of ferroelectric and magnetic phases on each other has been observed by measuring the room-temperature electron spin resonance and the dielectric properties at different temperatures and frequencies. The temperature-dependent dielectric properties at different frequencies confirm the non-relaxor ferroelectric nature of these composite samples, whereas the humps observed in the dielectric constant versus frequency plot suggest the electron hopping in a mixed spinel structure. This investigation offers a fundamental understanding of NiFe2O4 +BaTiO3 composite system for possible potential applications.

Products of Prolonged Autoxidation of Simple Dihydric Phenols in the Presence of Copper(II) Ions – An Electron Spin Resonance Study

Electron spin resonance (ESR) spectroscopy was used for characterizing the products obtained by prolonged autoxidation of simple dihydric phenols (hydroquinone, catechol, and 4-methylcatechol) in the presence of copper(II) ions. Room temperature ESR spectra revealed that both paramagnetic copper(II) ions and organic radicals are present in obtained autoxidation products similarly to the humic acid complexed copper(II) ions. The ratio of organic radical signal intensity to the copper(II) ion signal intensity suggests that the smallest amount of copper(II) ions is incorporated in the hydroquinone autoxidation product while the highest amount of copper(II) ions is incorporated in the autoxidation product of catechol. Satisfactory computer simulations of experimental ESR spectra were obtained by considering only one type of copper(II) ion binding site for hydroquinone autoxidation product and two distinct types of copper(II) ion binding sites for catechol and 4-methylcatechol autoxidation products. Parameters obtained by the computer simulation of ESR spectra indicated prevalent ionic bonding of copper(II) ions in polymeric matrices with tetrahedral distortion at copper(II) ion binding sites and negligible exchange interactions between them. Products obtained by the hydroquinone and catechol autoxidation have more similar characteristics in comparison to the product obtained by the 4-methylcatechol autoxidation where more expressed ionic bonding of copper(II) ions, and smaller tetrahedral distortion are present. Due to the dipolar interactions of oxygen-centered organic radicals in autoxidation products with paramagnetic copper(II) ions, their ESR linewidths are larger and g-values smaller in comparison to the values found in humic acids from various soil types.

Clustering of Stearic Acids in Model Phospholipid Membranes Revealed by Double Electron-Electron Resonance.

Free fatty acids play various important roles in biological membranes. Double electron-electron resonance spectroscopy (DEER, also known as PELDOR) of spin-labeled biomolecules is capable of studying magnetic dipole-dipole (d-d) interactions between spin labels at the nanoscale range of distances. Here, DEER is applied to study intermolecular d-d interactions between doxyl-spin-labeled stearic acids (DSA) in gel-phase phospholipid bilayers composed either of an equimolecular mixture of 1,2-dipalmitoyl-sn-glycero-3-phosphocholine and 1,2-dioleoyl-sn-glycero-3-phosphocholine or of 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine. DEER data obtained for different DSA concentrations showed that DSA molecules at their concentration in the bilayer χ larger than 0.5 mol % are assembled into lateral lipid-mediated clusters, with a characteristic intermolecular distance of 2 nm. Some evidences were obtained indicating that clusters may consist of "subclusters", alternatively appearing in two opposite leaflets. Conventional electron paramagnetic resonance (EPR) spectra for the gel-phase bilayers showed that for χ larger than 2 mol % the molecules in the clusters stick together, forming oligomers. Room-temperature EPR spectra for the liquid-crystalline phase were found to change noticeably for χ larger than 0.5 mol %, which may indicate the clustering in a liquid-crystalline phase similar to that observed by DEER in the gel phase.

Two Photochromic Complexes Assembled by a Nonphotochromic Ligand: Photogenerated Radical Enhanced Room-Temperature Phosphorescence.

Stimulating tunable room-temperature phosphorescence (RTP) is still a challenge in photochromic systems, which is vital for multifunctional coordination materials. Herein, we synthesized two new photochromic chain complexes through self-assembly of the nonphotochromic 1,3,5-tris(4-pyridyl)benzene ligand, diphosphonate, and Ln(III) ions (1 for Ln(III) = Dy and 2 for Ln(III) = Gd). Both compounds showed fast photoresponses with the color turning from yellow to dark gray with a reversible decoloration by heating or storage in the dark. The electron transfer photochromic behavior with the generated stable radicals was further confirmed by the room-temperature UV-vis and electron paramagnetic resonance spectra. Furthermore, via tuning the generation and disappearance of stable radicals, reversible room-temperature fluorescence and phosphorescence for both compounds were switched by light irradiation and a thermal treatment, with an enhanced intensity for RTP and a decrease in fluorescence during the duration of Xe-lamp light irradiation. This work provides a new strategy that photogenerated radicals could promote and enhance RTP properties in functional materials.

Extensive incorporation of carboxyl groups into g-C3N4 by integrated oxygen doping and HNO3 oxidation for enhanced catalytic ozonation of para-chlorobenzoic acid and atrazine

Carbon nitride (CN), oxygen-doped carbon nitride (CNO), HNO3 oxidized CN (CN-10) and CNO (CNO-10), were synthesized and used to catalyze ozonation of para-chlorobenzoic acid (p-CBA) and atrazine in aqueous solution. Pre-doping oxygen atom into CN could create extra defects for grafting more carboxyl groups during HNO3 oxidation, which was verified by much lower formation energy of CNO-10 than that of CN-10. Density functional theory and room temperature electron paramagnetic resonance (EPR) analysis signified the changes of electronic structure afforded by extensively grafted carboxyl groups. The incorporation of carboxyl groups distorted the carbon nitride framework and changed the spatial dimensions of CN and CNO, which attenuated the characters of delocalized π-electrons in conjugated structure. Moreover, the introduction of carboxyl groups reduced the pore diameter and nano-size distributed in aqueous solution for CN-10 and CNO-10 relative to those of CN and CNO. Results showed that the elimination efficiency of p-CBA by catalytic ozonation and Rct (standard reactivity metric for catalytic ozonation process) with CNO-10 improved 1.12- and 1.48-fold relative to those with CN-10, respectively, far surpassing non-catalytic ozonation. The removal of ozone-resisted compounds by CNO-10 catalyzed ozonation was not significantly affected by bicarbonate and NOM, and it was promoted by natural surface water resulting in 87.4% p-CBA removal in 30 min. Mechanistic evaluation demonstrated that carboxyl groups were the main active sites, catalyzing ozone decomposition into hydroxyl radical through radical chain reaction. This work provides fundamental supportive of pre-doping oxygen atom into CN before HNO3 functionalization, which could incorporate more carboxyl groups on surface compared to conventional strategy, further enhancing catalytic activity in ozonation.

Ultrathin nanoflake-assembled hierarchical BiOBr microflower with highly exposed {001} facets for efficient photocatalytic degradation of gaseous ortho-dichlorobenzene

A series of BiOBr catalysts with different microstructures were synthesized by tuning the solvothermal conditions. Assisted by the surface photovoltage, transient photovoltage and time-resolved photoluminescence techniques, the photoexcited charge carriers separation and transfer dynamics were comparatively investigated. The results indicated that the hierarchical BiOBr microflower (BiOBr MF) consisting of well-organized ultrathin nanoflakes were most efficient in promoting charge carrier separation and migration, resulting from the nearly 100 % {001} facets exposed with more oxygen defects. Furthermore, the photocatalytic performance was estimated through the degradation of gaseous ortho-dichlorobenzene (o-DCB) under visible light irradiation, and the BiOBr MF exhibited superior photoactivity. The enhanced mechanism underlying the charge transfer was disclosed by the energy band structures and the reactive oxygen species which were examined by room temperature electron spin resonance. In addition, the catalytic oxidation process of o-DCB over the BiOBr MF and the corresponding surface intermediates was revealed by in situ FTIR spectroscopy.

Radiation induced defects in timolol: temperature dependent electron paramagnetic resonance spectroscopy analysis

Ionizing radiation-induced antihypertensive drug timolol in powder form was studied by means of electron paramagnetic resonance (EPR) technique as a function of temperature. The effect of temperature on EPR linewidth, intensity and spectra was investigated. The room temperature EPR spectra of ionizing radiation-induced timolol were recorded in dimethyl sulfoxide solution at a frozen state. The first-order kinetic mechanism rate constant of timolol was calculated. The findings on all EPR experimental data indicated that ionizing radiation-induced stable-free radical species on timolol are characterized by g = 2.0027.

Tailoring the optical, magnetic, and photocatalytic properties of ZnS quantum dots by rare-earth ion doping

Gd-doped ZnS quantum dots (QDs) were synthesized through a hydrothermal route. The energy gap of ZnS QDs could be tuned as a function of the Gd doping concentration. The room-temperature electron paramagnetic resonance spectra of the Gd-doped ZnS QDs showed two resonance signals at g ≈ 2.052 and 2.813, which were attributed to the Gd (III) ions located at sites with weak and intermediate crystal fields, respectively. In addition, the as-synthesized Zn0.49Gd0.01S and Zn0.47Gd0.03S QDs displayed well-defined room-temperature ferromagnetism. The photocatalytic degradation rates of all the fabricated samples were assessed on the phenol red dye under the UV light illuminations.

Identification of Radiolytically-Active Thermal Transition Phases in Boehmite

The stability of aluminum oxyhydroxide (AlOOH, boehmite) to radiolysis and dehydration to alumina (γ-Al2O3) under vacuum was investigated using TGA followed by detailed, structural analysis with Raman, powder X-Ray Diffraction (pXRD), high energy X-Ray Diffraction (heXRD), 27Al Magic Angle Spinning Nuclear Magnetic Resonance (27Al MAS NMR) spectroscopy, Scanning Electron Microscopy (SEM), and nitrogen adsorption. Slight structural deviations from annealing temperatures prior to phase transformation are evident using these techniques. Radiolytic characterizations by room temperature Electron Paramagnetic Resonance (EPR) spectroscopy showed that while boehmite preheated to 300 °C under vacuum remained crystalline boehmite as determined by bulk structural characterizations, this phase produced the largest amount of EPR-detectable defects. A more dramatic mass loss of 16% was achieved by preheating boehmite to 400 °C under vacuum that resulted in a phase similar to γ-Al2O3, but enriched with residual OH groups. Complete dehydration to γ-Al2O3 was accomplished by preheating to 550 °C, which showed no indication of residual OH groups. These results demonstrate that the residual OH groups contribute to the hydrogen gas evolved in the radiolysis of boehmite.

Electron paramagnetic resonance and optical properties of Cu+2 in PbO-Li2O-As2O3-B2O3 glasses

The room temperature electron paramagnetic resonance (EPR) and optical absorption studies of PbO-Li2O-As2O3-B2O3 glasses have been done by introducing a transition metal ion Cu+2 ion as a spin probe with fixed mole% in the given glass composition. Glasses containing transition metal (TM) ion give the information of site symmetry around the Cu+2 ion of the host glass. The EPR spectra of Cu+2 in all glass samples recorded in the X-band frequency (9.1–9.7 GHz) have similar features. The spin-Hamiltonian parameters have been calculated; the observed values are g|| > g⊥ > ge and A|| > A⊥. It suggests that the site symmetry around Cu+2 ion is tetragonal distorted octahedral and the ground state of Cu+2 is dx2-y2 (2B1g) orbital. The Cu+2 ion is coordinated with six ligand atoms in a distorted octahedron site symmetry. The optical absorption spectra exhibit a broadband corresponding to d-d transition bonds of Cu+2 ion. Calculated bonding parameters suggest the covalent nature of in-plane σ-bonding (α2) and pure ionic nature for out-of-plane (β2) and in-plane π-bonding (β12). This data is correlated with the theoretical optical basicity (Λth) values, and it is observed that the Γσ value increases whereas Γπ values decrease with increasing Λth.

Synthesis and investigations for white LED material: VO2+ doped Calcium Cadmium phosphate hydrate nanophosphor

Vanadyl ion doped Calcium Cadmium Phosphate Hydrate (CaCdPH–V) was synthesized by conventional SSR (solid state reaction) method. The powdered synthesized sample was characterized by PXRD, SEM with EDAX, UV–vis (optical) absorption, EPR and FTIR techniques. XRD studies confirm hexagonal crystal structure for VO2+ doped Calcium Cadmium phosphate hydrate with the crystallite size 42 nm. The crystalline size and lattice strain are also evaluated by the Williamson-Hall (W–H) analysis. The absorption spectrum of CaCdPH–V is recorded from 200 to 1200 nm. From the optical spectrum three bands are identified at 815 (12267 cm−1), 611 (16362 cm−1) and 453 nm (22069 cm−1). Room temperature Electron Paramagnetic Resonance spectrum of V4+ has depicted broad symmetric lines. From EPR & optical spectral studies confirmed that VO2+ ions is tetragonal compression with octahedral symmetry. The molecular orbital coefficients and different EPR parameters are also evaluated. CIE color coordinate is estimated from emission data by MATLAB program is found to be (0.3164, 0.3056) which is in white region. FTIR spectrum reveals the information about various characteristic bands of phosphate and OH bands of the prepared powder phosphate material. The novelty of the present work is to understand the site symmetry, colour purity of prepared sample and to make a suitable candidate for light emitting devices application point of view.

The Sub-picomolar Cu2+ Dissociation Constant of Human Serum Albumin.

The apparent affinity of human serum albumin (HSA) for divalent copper has long been the subject of great interest, due to its presumed role as the major Cu2+ -binding ligand in blood and cerebrospinal fluid. Using a combination of electronic absorption, circular dichroism and room-temperature electron paramagnetic resonance spectroscopies, together with potentiometric titrations, we competed the tripeptide GGH against HSA to reveal a conditional binding constant of log c =13.02±0.05 at pH 7.4. This rigorously determined value of the Cu2+ affinity has important implications for understanding the extracellular distribution of copper.

O2 atmospheric annealing-tunable defects in ionic oxide MgO nanoribbons

An isotropic lattice shrinkage (lattice volume ratio ∼−0.462%) structure was reported in cubic magnesium oxide (MgO) nanocrystals, favoring the enhanced electron correlation. Upon postannealing in an O2 atmosphere, significant changes in photoluminescence spectra were detected in pristine MgO nanoribbons (NRs): a substantial reduction in F+-type centers (Fc) and an increase in a previously unknown peak at 358 nm (3.46 eV) which we attribute to a small polaron (SP) complex as a deep acceptor. A reduced diluted magnetism was found in the O2-annealed MgO NRs. A room temperature electron paramagnetic resonance signal at g ∼ 2.0959 revealed the presence of an unpaired electron trapped in the MgO NRs and a weak broad signal shift at g ∼ 2.0888, suggesting a reduced anisotropic spin–orbit coupling in the O2-annealed MgO NRs. Finally, a view on competition between Fc and SP was proposed: the Fc defect favors FM, and the SP complex leads to reduced FM in MgO NRs. The findings provide new insight into the origin and defect engineering of d0 diluted magnetism in MgO (spin from MgO), and this physical mechanism would be generally applied to other ionic oxide family materials in the field.

Nanostructured Gd0.9Bi0.1FeO3 perovskite: Synthesis and investigation on morphology, optical, fluorescence and magnetic properties

Nanocrystalline Gd0.9Bi0.1FeO3 porous structure perovskite has been successfully synthesized by hydrothermal route. The detailed structural and morphological information were carried out through X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Field emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HR-TEM). The composition of the perovskite and oxidation states were established with the use of energy-dispersive X-ray spectroscopy (EDX) and X-Ray photoelectron spectroscopy (XPS), respectively. The Brunauer Emmett-Teller (BET) isotherm of the synthesized materials gave the pore size distribution and surface area of the particles. The optical property of the material was established with the use of UV–Visible spectrometer. The magnetic properties of the samples were measured using vibrating sample magnetometer (VSM) under applied magnetic field of 1.5 TT and room temperature electron paramagnetic resonance (EPR) spectra. The perovskite exhibits paramagnetic behaviour since the magnetization increases linearly with increasing magnetic field. The exchange interaction between different magnetic sub-lattices due to coupling interaction between dopant (Bi3+ ions) which is weakly ferromagnetic with the Fe sub-lattice and (anti-ferromagnetic) Gd sub-lattice thereby enhanced the magnetic property of the synthesized new material. The photoluminescence (PL) property was carried out using spectrofluorometer with the analysis range between 400 and 800 nm. The fluorescence spectral lines are observed in the visible range which attributed due to characteristic f–f transition lines of Bi3+ ions.