A5005342891- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Crystallography and molecular interactions
- Crystal structures of chemical compounds
- Crystal Structures and Properties
- Chemical Synthesis and Characterization
- Metal complexes synthesis and properties
- Zeolite Catalysis and Synthesis
- Metal-Organic Frameworks: Synthesis and Applications
- Solid-state spectroscopy and crystallography
- Synthesis and Characterization of Heterocyclic Compounds
- Synthesis and biological activity
- Chemical Synthesis and Analysis
- Asymmetric Synthesis and Catalysis
- Molecular Sensors and Ion Detection
- Physics of Superconductivity and Magnetism
- Clay minerals and soil interactions
- Multiferroics and related materials
- Advanced Condensed Matter Physics
- Magnetic and transport properties of perovskites and related materials
- Synthesis and Biological Activity
- Organophosphorus compounds synthesis
- Thermal and Kinetic Analysis
- Ferroelectric and Piezoelectric Materials
- Inorganic and Organometallic Chemistry
Bulgarian Academy of Sciences
2016-2025
Institute of Mineralogy
2012-2023
University Hospital Dr. Georgi Stranski
2014
Sofia University "St. Kliment Ohridski"
2012
Museum am Rothenbaum
2010
Universität Hamburg
2010
Georgi Nadjakov Institute of Solid State Physics
2010
Yamaguchi University
2007-2009
Argonne National Laboratory
1998-2007
New Jersey Institute of Technology
2004
This study aimed to develop a semisolid vehicle for topical delivery of nanoencapsulated St. John’s wort (SJW) extract, rich in hyperforin (HP), and explore its wound-healing potential. Four nanostructured lipid carriers (NLCs) were obtained: blank HP-rich SJW extract-loaded (HP-NLC). They comprised glyceryl behenate (GB) as solid lipid, almond oil (AO), or borage (BO) representing the liquid along with polyoxyethylene (20) sorbitan monooleate (PSMO) (SMO) surfactants. The dispersions...
Alluaudite-type Na<sub>2+δ</sub>Mn<sub>2−δ/2</sub>(SO<sub>4</sub>)<sub>3</sub>is obtained by dehydration of the kröhnkite-type phase Na<sub>2</sub>Mn(SO<sub>4</sub>)<sub>3</sub>·2H<sub>2</sub>O and can deliver a reversible capacity 135 mA h g<sup>−1</sup>as cathode materials in lithium ion cells.
A metal–organic framework, MOF-S1, was synthesized via a solvothermal reaction between 2,4,6-tris-(4-carboxyphenoxy)-1,3,5-triazine (TCPT) and zinc nitrate hexahydrate. Single-crystal powder X-ray diffraction analyses confirmed the formation of hexagonal rod-shaped crystals with trigonal (P-31c) structure featuring two-fold interpenetrated 3D framework. comprehensive characterization—including NMR spectroscopy, thermogravimetric analysis, surface area measurements (using Langmuir, t-plot,...
A new method for the synthesis of 1,3-disubstituted benzimidazole derivatives was developed using aza-Michael addition. The target compounds were synthesized in good yields and purity tested on isolated hepatocytes their toxicity antioxidant activity. properties substances with lowest evaluated oxidative stress induced by tert-butyl hydroperoxide (tert-BOOH). Some them as methyl 3-[3-(3-methoxy-3-oxopropyl)-5-benzoyl-2-thioxo-2,3-dihydro-1H-benzimidazol-1-yl]propanoate 10...
The polarized Raman spectra of the inverse spinel LiFe${}_{5}$O${}_{8}$ (LFO) were studied for both B-site-ordered ($\ensuremath{\alpha}$) and B-site-disordered ($\ensuremath{\beta}$) phases. symmetry all lines was determined an assignment to phonon modes involving specific atomic motions done by comparison lattice dynamics calculations. exhibit strongly resonant behavior, enhancement some one-phonon bands two-phonon being probably related Franck-Condon mechanism excitation decay electronic...
A straightforward approach to the synthesis of a series 1,2-disubstituted planar chiral ferrocenes was achieved using ortho-directed lithiation ferrocenesulfonamides followed by reaction with electrophilic reactants. The 1,2-functionalized were obtained in good yields, and individual diastereoisomers could be isolated pure form. relative configurations chemical groups positions 1 2, which are relevant for chirality, derived from NMR experiments, absolute configuration determined X-ray...
Three new molecular complexes (phen)3(2-amino-Bz)2(H+)(BF4−)·3H2O 5, (phen)3(2-amino-5(6)-methyl-Bz)2(H+)(BF4−)·H2O 6, and (phen)(1-methyl-2-amino-Bz)(H+)(BF4−) 7, were prepared by self-assembly of 1,10-phenanthroline (phen) various substituted 2-aminobenzimidazoles. Confirmation their structures was established through spectroscopic methods elemental analysis. The X-ray diffraction analysis revealed that the crystal structure 7 is stabilized formation hydrogen bonds short contacts. In...
This paper poses a major question regarding the choice of space group for scapolite mineral members. An artificial boundary is typically drawn between groups I4/m and P42/n when solving structures scapolites within marialite–meionite series. The authors debate if crystal structure in lower symmetries justified. here attributed to Si-Al ordering framework, it shown that interstitial framework cations anions have an accompanying role decision. Some answers on ranges limits distribution members...
Abstract A series of new tautomeric azonaphthols are synthesized and the possibilities for molecular switching investigated using spectroscopy, X‐ray analysis density functional theory quantum chemical calculations. Two opposite effects that influence studied: attaching a piperidine sidearm, adding substituents to phenyl ring. On one hand, attached moiety stabilizes enol form leading controlled shift equilibrium upon protonation. other relative stability azonaphthol tautomers strongly...
Structural distribution of zinc(II) ions in the pore system three silicate molecular sieves has revealed an unprecedented application microporous titanosilicate Zn–ETS-4 as a non toxic, highly efficient and selective inhibitor HeLa cancer cells.
Polarized Raman spectra of oriented $\mathrm{Ca}{\mathrm{Mn}}_{7}{\mathrm{O}}_{12}$ single crystals have been studied in a broad temperature range (5--500 K) covering the crystallographic, ferroelectric, and magnetic transitions. From obtained at room (RT) 10 out total 12 active $6{A}_{g}+6{E}_{g}$ modes trigonal $R\overline{3}$ phase identified assigned to definite atomic motions close comparison results lattice-dynamics modeling. With decrease below 250 K some bands split, additional...
Abstract The X-ray crystal structures of the anthracene-derived bis-aminophosphonates 4.4′-bis[N-methyl(diethoxyphosphonyl)-1-(9-anthryl)]diaminodiphenylmethane (1) and 1,3-bis [N-methyl(diethoxyphosphonyl)-1-(9-anthryl)]diaminobenzene (3) are reported. analyses demonstrated that both compounds crystallize in a centrosymmetric manner containing meso-form pair enantiomers (3). cytotoxic potential, genotoxicity, antiproliferative activity 1...
Alluaudite sulfates are predicted to be high-voltage electrodes for lithium- and sodium-ion batteries. Herein, we provide the first experimental evidence operation of sodium cobalt-manganese sulfate, Na2+2δ(Co0.63Mn0.37)2-δ(SO4)3, at potentials higher than 4.0 V vs. Li/Li+. This fact comes as a result reduced cationic deficiency, redox properties Co Mn stability alluaudite structure during alkali ion intercalation.
Urea complexes of magnesium sulfate have been intensively studied due to their application in many areas life, including agricultural chemistry, pharmacy, medicine, etc. The aim this study is add new knowledge about the trends and consistencies preparation procedures MgSO4·nOC(NH2)2·mH2O phases. A set analytical methods was used characterize structure, thermal spectroscopic properties. conditions for obtaining three pure form were specified crystal structures MgSO4·OC(NH2)2·2H2O...