Spectroscopic methods

Ebook "Russian contributions to analytical chemistry" offers a unique perspective and novel information on the significant contributions of Russian scientists to analytical chemistry and chemical analysis. Written by the Editor-in-Chief of the Journal of Analytical Chemistry, it discusses various examples of new methods and approaches originating in Russia, such as chromatography, electrothermal atomic absorption spectrometry, Kumakhov X-ray optics, the Spolský effect in fluorescent analysis and important innovations in mass spectrometry, which are already widely used.

165p tracanhphuonghoa1007 22-04-2024 6 3   Download

Ebook "Rare-earths and actinides in high energy spectroscopy" gives a theoretical discussion of the various spectroscopic methods that shed light on the character of the f electrons and on the connection between their localization and the properties of these materials. Part 1 covers the characteristics of the f electrons in atoms and solids and includes a discussion of the properties of lanthanides and actinides in connection with the f electrons. Part 2 describes the various spectroscopic methods that are used to establish the electronic distributions and energies of the states.

393p tudohanhtau1006 29-03-2024 3 1   Download

Ebook "Visualization of hydrogen-bond dynamics: Water-based model systems on a Cu(110) surface" have been carried out by means of spectroscopic methods where the signal stems from the ensemble of a system and the hydrogen-bond dynamics were inferred indirectly. This book addresses the direct imaging of hydrogen-bond dynamics within water-based model systems assembled on a metal surface, using a scanning tunneling microscope (STM).

139p coduathanh1122 27-03-2024 2 1   Download

Ebook "Challenges in molecular structure determination" provide a practice-oriented and systematic introduction to both organic and inorganic structure determination by spectroscopic methods. This includes mass spectrometry, vibrational spectroscopies, UV/VIS spectroscopy and NMR as well as applying combinations of these methods. The authors show how to elucidate chemical structures with a minimal number of spectroscopic techniques. Readers can train their skills by more than 400 problems with varying degree of sophistication.

500p coduathanh1122 27-03-2024 7 1   Download

Ebook "Electron–phonon interaction in conventional and unconventional superconductors" describes the development and scientific implementation of a new experimental method that puts this old problem into an entirely new light. The nominee has made major contributions to the development and implementation of a new experimental method that enhances the resolution of spectroscopic experiments on dispersive lattice-vibrational excitations (the "glue" responsible for Cooper pairing of electrons in conventional superconductors) by more than two orders of magnitude.

115p coduathanh1122 27-03-2024 2 1   Download

Ebook "d-d excitations in transition-metal oxides: A spin-polarized electron energy-loss spectroscopy (SPEELS) study" investigations of the electronic structures of the transition-metal oxides MnO, CoO, and NiO with spin-polarized electron energy-loss spectroscopy are presented and compared with other experimental and theoretical results. After a review of the present knowledge of the electronic structure of the monoxides, the spectroscopic method applied and its special advantages are described.

155p coduathanh1122 27-03-2024 4 1   Download

Ebook "Nonlinear hamiltonian mechanics applied to molecular dynamics: Theory and computational methods for understanding molecular spectroscopy and chemical reactions" presents numerical methods for describing and calculating invariant phase space structures, as well as solving the classical and quantum equations of motion for polyatomic molecules. Examples covered include simple model systems to realistic cases of molecules spectroscopically studied.

165p nhanphanguyet 28-01-2024 6 2   Download

Ebook "Optical spectroscopy and computational methods in biology and medicine" gives a comprehensive overview of recent progress in various vibrational spectroscopic techniques and chemometric methods and their applications in chemistry, biology and medicine. In order to meet the needs of readers, the book focuses on recent advances in technical development and potential exploitations of the theory, as well as the new applications of vibrational methods to problems of recent general interest that were difficult or even impossible to achieve in the not so distant past.

540p nhanphanguyet 28-01-2024 4 2   Download

In the present study, two chemometric techniques, Artificial Neural Network (ANN) and Partial Least Square-Discrimination Analysis (PLSDA) have been assessed for their efficiencies for classification. Here, UV spectroscopic data are used as input.

6p viisac 23-09-2023 3 1   Download

Symplocos cochinchinensis grown at Quang Ngai Province has been harvested and investigated. The present study reports the isolated triterpenes from Symplocos cochinchinensis leaves. From the n-hexane fraction, two compounds including β-amyrin palmitate (1), corosolic acid (2), were isolated and identified.

8p vifriedrich 06-09-2023 4 1   Download

Titanium dioxide/graphene aerogel (TiO2/GA) was synthesized via a one-pot hydrothermal method and characterized by various spectroscopic techniques, including X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscope, transmission electron microscopy, Raman spectroscopy, and UV-Vis spectroscopy.

10p viberbers 09-08-2023 4 3   Download

In the present work, a modified b-nickel hydroxide (b-Ni(OH)2) electrode material with CuO has been prepared using a co-precipitation method. The structure and property of the modified b-Ni(OH)2 with CuO were characterized by X-ray diffraction (XRD), Fourier Transform infra-red (FT-IR), Raman and thermal gravimetric-differential thermal analysis (TG-DTA) techniques.

6p viberbers 09-08-2023 6 4   Download

Results of this investigation have been correlated with the films structural and optical properties. Among the structural properties, surface roughness and morphology, and crystalline quality of the films have been obtained by using the XRD and AFM methods. Additionally, optical properties such as band gap tune-ability and dielectric constant have been determined by spectroscopic ellipsometer.

7p viberbers 09-08-2023 4 3   Download

Using various chromatographic methods, five compounds, including three flavone C-glycosides: i) Isoviolanthin; ii) Isoorientin; iii) Isovitexin; iv) Two megastigmanes excoecarioside A; and v) Corchoionoside C were isolated from the leaves of Tinospora sinensis (Lour.) Merr. Their structures were identified based on spectroscopic methods and comparisons with those reported in the literature.

7p viberkshire 09-08-2023 7 2   Download

The ligand picolinoyl(4-ethylthiosemicarbazide) HL was synthesized by the reaction of picolinohydrazide and ethyl isothiocyanate in absolute ethanol. The structure of HL was characterized by spectroscopic methods such as IR, 1H, and 13C NMR spectroscopy.

6p viberkshire 09-08-2023 8 5   Download

In this paper, the isolation and structural elucidation of three compounds: albifolione (1), zeorin (2), and atranorin (3) from the lichen P. cristiferum are reported. Their structures were elucidated from spectroscopic data and comparison with literature data.

6p vinebula 02-06-2023 6 2   Download

In order to that, we fabricated MoS2 by utilizing a hydrothermal method for adsorption of tartrazine. As-prepared sample was characterized by spectroscopic analysis methods (XRD, BET, FTIR and SEM). The adsorption isotherm and thermodynamic of tartrazine on MoS2 were investigated.

6p vidoctorstrange 06-05-2023 3 2   Download

Ten novel 2-aryl-5-(arylsulfonyl)-1,3,4-oxadiazoles were produced and assessed for their in vitro antibacterial and antioxidant activities. Diverse spectroscopic methods like 1 H NMR, 13C NMR, IR, and LCMS were used for the characterization of the prepared samples and all the data was in good agreement with the anticipated structures.

41p lyhuyenthu 31-01-2023 4 2   Download

In this study, the synthesis of dimeric disulfide-Schiff bases was carried out using two methods. The structures of the obtained Schiff bases were elucidated by various spectroscopic methods as well as elemental analysis. The Schiff base derivative compounds (3a-6) were screened for in vitro antibacterial activity against multidrug-resistant microorganisms using microdilution method. All the tested compounds showed varying inhibition zones against the pathogens.

22p lyhuyenthu 31-01-2023 9 2   Download

In this study, photocatalytic degradation of paracetamol (acetaminophen), an analgesic and antipyretic drug, was investigated in using semiconductors under UV-B and sunlight irradiation. Semiconductor materials, Bi2 O3 , ZnO, TiO2 , and ZrO2 , were prepared using simple sol–gel, coprecipitation, and microwave synthesis methods. These photocatalyts were characterized by various spectroscopic and other techniques.

9p lyhuyenthu 31-01-2023 9 2   Download