« Home « Kết quả tìm kiếm

Spectroscopic techniques

Tìm thấy 12+ kết quả cho từ khóa "Spectroscopic techniques"

Premilinary Study in the Cause of Color in Zircon from Krông Năng Mining Area in Đắk Lắk Province

6.pdf

repository.vnu.edu.vn

The zircon samples from Krong Nang mining area have been studied with a FTIR and UV-Vis-NIR techniques. All of the diverse spectroscopic techniques, however, have in common that they probe energy differences between a ground and excited states, mostly upon interaction of the mineral with incident radiation. Spectroscopic techniques are thus sensitive to the local structure and provide information on the short-range order..

Synthesis, spectroscopic characterization, and genotoxicity of a new group of azo-oxime metal chelates

tailieu.vn

The structures of the synthesized compounds were elucidated using a number of analytical methods and spectroscopic techniques. The level of impurity in the product was checked with thin layer chromatog- raphy (TLC). All of the metal complexes, [Mn(pxoxH) 2 (H 2 O) 2 ].H 2 O (3), [Co(pxoxH) 2 (H 2 O) 2 ].4H 2 O (4), [Ni(pxoxH) 2 (H 2 O) 2 ].2H 2 O (5), [Cu(pxoxH) 2 ].H 2 O (6), [Zn(pxoxH) 2 ].6H 2 O (7), and [Cd(pxoxH) 2 (H 2 O) 2.

Novel metal-free and metallophthalocyanines containing four 21-membered pentathiadiaza macrocycles: synthesis, characterization, and study of aggregation properties

tailieu.vn

Characterization of the newly synthesized compounds was performed by elemental analysis and spectroscopic techniques. N,N dicyano-1,2-phenylene)bis(sulfanediyl)bis(2,1-phenylene))bis(2-chloroacetamide) 1 was synthesized by following the procedure reported in the literature.

Combined computational and experimental studies on cysteine-sulfadiazine adduct formation

tailieu.vn

In vitro study of the interaction of cysteine with a thiazide diuretic (hydrochlorothiazide) at different pH by voltammetric and spectroscopic techniques. doi: 10.1134/S . Voltammetric, spectroscopic and thermal investigations of the interaction of levofloxacin with cysteine at physiological pH. doi: 10.4321/S . doi: 10.3923/biotech . doi: 10.1016/j.ijbiomac . doi: 10.1007/s . doi: 10.1208/s . Electrochemical biosensor evaluation of the interaction between DNA and metallo-drugs Biometals 2006.

Investigation of the hydrogen bond donating ability of 1,8-naphthalenediol by NMR spectroscopy and its use as a hydrogen bonding catalyst

tailieu.vn

In this study, the hydrogen bond donating ability of 1,8-naphthalenediol (7) has been investigated in detail using a variety of NMR spectroscopic techniques, and subsequently, its catalytic activity has been explored.. While compound 10 is expected to have a similar intramolecular hydrogen bond in its structure (10. 1-naphthol (8) does not have this possibility, and its –OH group is available for an intermolecular hydrogen bonding interaction.

Organic biomolecules bind to phosphate through borate linkages in aqueous solutions

tailieu.vn

The products, triphosphateborate ester of salicylic acid (1), orthosphateborate ester of ascorbic acid (2), triphosphateborate ester of ascorbic acid (3), and orthosphateborate ester of citric acid (4), were flash precipitated with cold acetone and characterised by microanalysis, thermal analysis, FT-IR, Raman, 11 B NMR, 31 P MAS NMR, and mass spectroscopic techniques.

Preparation, structure elucidation, and antioxidant activity of new bis(thiosemicarbazone) derivatives

tailieu.vn

The structures of the new compounds were characterized by Fourier-transform infrared (FT–IR), proton–carbon nuclear magnetic resonance ( 1 H NMR– 13 C NMR), and ultraviolet–visible (UV–Vis) spectroscopic techniques, as well as elemental analysis. Therefore, the in vitro antioxidant activity of all of the obtained molecules were evaluated by the 1,1-diphenyl-2-picryl hydrazyl (DPPH) free- radical trapping process.

A thesis submitted in fulfilment of the requirements for the degree of Master of Applied Science: Designing protic ionic liquids to be compatible with biomolecules

tailieu.vn

Recently, it has been shown that in order to develop an advanced understanding of the impact that ionic liquids have on the structure of proteins in solution multiple different spectroscopic techniques are required e.g. N., Jr., The molecular structure of green fluorescent protein. L., Applications of the green fluorescent protein in cell biology and biotechnology. L., FTIR Spectroscopic Study of the Secondary Structure of Globular Proteins in Aqueous Protic Ionic Liquids.

Synthesis, characterization and evaluation of antibacterial activity of copper(ii) curcumin complex against staphylococcus aureus

tailieu.vn

In present work, the 1:2 copper(II)- curcumin complex was successfully synthesized in a moderate yield (60.6 % yield) and characterized by spectroscopic techniques. peak of the complex is blue-shifted by 74 nm in comparison with that of curcumin ligand.. This shift was attributed to the curcumin- metal charge transfer between carbonyl group of curcumin and metal ion in the complex.

Idoc.vn Phuong Phap Phan Tich Pho Nmr

www.scribd.com

Cooper (1980), Spectroscopic Techniques for Organic Chemist, John Wiley & Sons.4. LÝ THUY Ế T CHUNG  H ạ t nhân c ủ a m ộ t s ố nguyên t ố c ũ ng nh ư đồ ng v ị có nh ữ ngtính ch ấ t nh ư th ể chúng là nh ữ ng nam châm quay quanh m ộ t tr ụ c.

Synthesis, characterization, and DFT calculation of a Pd(II) Schiff base complex

tailieu.vn

In the present study, the palladium(II) complex of 4-((E)-(2-((E)-2,4-dihydroxy benzylidene amino) ethylimino) methyl) benzene-1,3-diol (H 2 L) was prepared and characterized by thermogravimetric studies, elemental analy- sis, molar conductance, and spectroscopic techniques, and its geometric structure. The results showed that the structure of the complex is distorted square-planer in which the H 2 L acts as a dianionic tetradentate ligand in a N, N, O.

Characterization and purification of 1,2,4-triazole-containing phthalocyanines synthesized by microwave method and structure elucidation by spectroscopic techniques

tailieu.vn

doi:10.3906/kim-1807-54 h t t p. Abstract: The complexes of peripherally tetra-substituted metal-free (8), lead(II) (9), and zinc(II) (10) phthalocyanine derivatives were synthesized for the first time in this work. The thermogravimetric behavior of compounds 8–10 was determined by thermogravimetric analysis method in addition to these spectral methods.. 1 Because these chemicals have a large π- conjugated system, they absorb strongly...

Investigation of zinc oxide thin film by spectroscopic ellipsometry

tainguyenso.vnu.edu.vn

An accurate determination of the optical constants of these films is extremely important prior to its application in optical devices and spectroscopic ellipsometry provides a reasonably accurate method for the determination of optical constants of thin films. In this study, we present the results gained by analyzing spectroscopic ellipsometry of ZnO thin film combined with comparison of transmission spectroscopy measured on a UV-VIS-NIR spectrophotometer.

Synthesis and spectroscopic characterization of new phthalocyanine derivatives: application as photocatalysts for the degradation of Orange G

tailieu.vn

In recent times, several techniques to improve the efficiency and reusability of the photoactive compounds responsible for photodegradation have been explored [6–9]. This family of compounds is favored due to their excellent absorption in the visible range of the electromagnetic spectrum, their high chemical and thermal stability, and their remarkable ability to generate reactive singlet oxygen ( 1 O 2 ) from ground state molecular oxygen during photoexcitation [8,9,12]..

Synthesis of Hofmann-type Zn(H2O)2Ni(CN)4.nG (G = water and 1,4-dioxane) clathrates and the determination of their structural properties by various spectroscopic methods

tailieu.vn

The various structural properties of Hofmann-type complexes and clathrates can be explained by various spectroscopic methods, such as vibrational (infrared (IR) and Raman), nuclear magnetic resonance, electron spin resonance, thermal analysis, single-crystal X-ray diffraction (SC-XRD) techniques, and magnetic moment spectroscopy.

Spectroscopic and thermodynamic approach to the interaction of nonperipherally substituted cationic phthalocyanines with calf thymus (CT)-DNA

tailieu.vn

Compounds 1Q–3Q were characterized by spectroscopic methods ( 1 H NMR, FTIR, and UV-Vis spectra). The compounds (1Q–3Q) prepared in this study are soluble in DMSO, DMF, and water as expected.. The IR spectra of the Pcs 1Q–3Q are very similar to each other. In the 1 H NMR spectrum of metal-free Pc (1Q) in DMSO- d 6 the aromatic protons resonated between 9.22 and 8.04 ppm (Figure S1).

Preconcentration of rifampicin prior to its efficient spectroscopic determination in the wastewater samples based on a nonionic surfactant

tailieu.vn

Preconcentration of rifampicin prior to its efficient spectroscopic determination in the wastewater samples based on a nonionic surfactant. For the treatment of TB patients, different antibiotics such as rifampicin and isoniazid have been widely used [3]..

Schiff base of isoniazid and ketoprofen: synthesis, X-ray crystallographic, spectroscopic, antioxidant, and computational studies

tailieu.vn

Schiff base of isoniazid and ketoprofen: synthesis, X-ray crystallographic, spectroscopic, antioxidant, and computational studies. The Schiff base of isoniazid with ketoprofen is synthesized in this research. Infrared spectroscopy (IR) and X-ray diffraction (XRD) analysis of the crystal packing proved the formation of the Schiff base and the existence of N-H. O hydrogen bonds between the hydrogen-bonded dimer of the Schiff base.

Activity 4.1: Choosing Techniques

tailieu.vn

Activity 4.1: Choosing Techniques. Each information-gathering technique has its own advantages and. You need to choose the technique that would be most effective for the project and the organization. In this activity, you will look at two different scenarios and choose the information-gathering techniques for each..

Examining Styles and Techniques

tailieu.vn

ANALYSIS OF TECHNIQUE AND STYLE: An illustrated discussion compares the styles and techniques of drawings by the masters with my own.. This article provides a greater understanding of the drawing techniques of the masters of the renaissance, and invites readers to compare masters’ drawings to mine to examine commonalities specific to hatching and crosshatching techniques..