Acceder

Bibliografías temáticas / Organic compounds – spectra – tables / Artículos de revistas

Siga este enlace para ver otros tipos de publicaciones sobre el tema: Organic compounds – spectra – tables.

Artículos de revistas sobre el tema "Organic compounds – spectra – tables"

Autor: Grafiati

Publicado: 28 de julio de 2024

Última modificación: 31 de julio de 2025

Crea una cita precisa en los estilos APA, MLA, Chicago, Harvard y otros

Elija tipo de fuente:

Consulte los 50 mejores artículos de revistas para su investigación sobre el tema "Organic compounds – spectra – tables".

Junto a cada fuente en la lista de referencias hay un botón "Agregar a la bibliografía". Pulsa este botón, y generaremos automáticamente la referencia bibliográfica para la obra elegida en el estilo de cita que necesites: APA, MLA, Harvard, Vancouver, Chicago, etc.

También puede descargar el texto completo de la publicación académica en formato pdf y leer en línea su resumen siempre que esté disponible en los metadatos.

Explore artículos de revistas sobre una amplia variedad de disciplinas y organice su bibliografía correctamente.

1

Sofińska, Kamila, Natalia Wilkosz, Marek Szymoński, and Ewelina Lipiec. "Molecular Spectroscopic Markers of DNA Damage." Molecules 25, no. 3 (2020): 561. http://dx.doi.org/10.3390/molecules25030561.

Texto completo

Resumen

Every cell in a living organism is constantly exposed to physical and chemical factors which damage the molecular structure of proteins, lipids, and nucleic acids. Cellular DNA lesions are the most dangerous because the genetic information, critical for the identity and function of each eukaryotic cell, is stored in the DNA. In this review, we describe spectroscopic markers of DNA damage, which can be detected by infrared, Raman, surface-enhanced Raman, and tip-enhanced Raman spectroscopies, using data acquired from DNA solutions and mammalian cells. Various physical and chemical DNA damaging

Los estilos APA, Harvard, Vancouver, ISO, etc.

2

ZAPOROZHETS, Oleksandr, Yuliia DAVYDENKO, Vadim PAVLENKO, and Igor FRITSKY. "NOVEL PROTOCOL OF PREPARATION OF SOLUBLE TANTALUM FLUORIDE COMPLEX." Bulletin of Taras Shevchenko National University of Kyiv. Chemistry, no. 1 (59) (2024): 71–75. https://doi.org/10.17721/1728-2209.2024.1(59).12.

Texto completo

Resumen

Background. The research aimed to find a convenient preparative method for the synthesis of tantalum water-soluble complexes from metal oxide, which would not require harsh or hazardous reaction conditions or the use of expensive, less accessible reagents. The application of the triethylamine-hydrogen fluoride complex as an inexpensive and safe surrogate for hydrofluoric acid facilitated the conversion of tantalum oxide into a form suitable for further transformations in aqueous or organic environments under mild conditions and without any restrictions on the use of glassware. Methods. In this

Los estilos APA, Harvard, Vancouver, ISO, etc.

3

Sarang, Kumar, Krzysztof J. Rudziński, and Rafał Szmigielski. "Green Leaf Volatiles in the Atmosphere—Properties, Transformation, and Significance." Atmosphere 12, no. 12 (2021): 1655. http://dx.doi.org/10.3390/atmos12121655.

Texto completo

Resumen

This review thoroughly covers the research on green leaf volatiles (GLV) in the context of atmospheric chemistry. It briefly takes on the GLV sources, in-plant synthesis, and emission inventory data. The discussion of properties includes GLV solubility in aqueous systems, Henry’s constants, partition coefficients, and UV spectra. The mechanisms of gas-phase reactions of GLV with OH, NO3, and Cl radicals, and O3 are explained and accompanied by a catalog of products identified experimentally. The rate constants of gas-phase reactions are collected in tables with brief descriptions of correspond

Los estilos APA, Harvard, Vancouver, ISO, etc.

4

Tucker, Sheryl A., William E. Acree, Maximilian Zander, Pierre Demerseman, and Jean-Pierre Buisson. "Spectroscopic Properties of Polycyclic Aromatic Compounds. Part III: Fluorescence Emission and Quenching Behavior of Periodic Table Group 16 Hetero-Atom Derivatives." Applied Spectroscopy 47, no. 3 (1993): 317–20. http://dx.doi.org/10.1366/0003702934066622.

Texto completo

Resumen

Fluorescence emission spectra are reported for benzo[b]naphtho[2,3d]furan, dinaphtho[l,2b:l′,2′d]furan, dinaphtho[2,lb:l′,2′d]furan, dibenzo[2,3:10,11]perylo[l,12bcd]furan, dibenzo[2,3:10,ll]perylo-(l,12bcd]thiophene, naphtho[l,8bc:5,4b′c′]dipyran (also called 1,6-dioxapyrene), and naphtha[l,8bc:4,5b′c′]dipyran (also called 1,8-dioxapyrene) in organic nonelectrolyte solvents of varying polarity. Results of these measurements indicate that dinaphtho[l,2b:l′,2′d]furan exhibits slight signs of probe character as evidenced by changing emission intensity ratios; however, the dynamic range was much

Los estilos APA, Harvard, Vancouver, ISO, etc.

5

Li, Chunhou, Xican Li, Jingyuan Zeng, et al. "Detection of Adulterated Naodesheng Tablet (Naodesheng Pian) via In-Depth Chemical Analysis and Subsequent Reconstruction of Its Pharmacopoeia Q-Markers." Molecules 29, no. 6 (2024): 1392. http://dx.doi.org/10.3390/molecules29061392.

Texto completo

Resumen

Naodesheng Tablet (Naodesheng Pian), a traditional Chinese medicine formula for stroke treatment, is made up of five herbal medicines, i.e., Sanqi, Gegen, Honghua, Shanzha, and Chuanxiong. However, the current Pharmacopoeia quality-marker (Q-marker) system cannot detect possible adulteration. Our study tried to use a new strategy, i.e., standards-library-dependent ultra-high-performance liquid chromatography-quadrupole-Orbitrap mass spectrometry (UHPLC-Q-Orbitrap MS/MS) putative identification, to reconstruct the Q-marker system. Through the strategy, 30 isomers were successfully differentiate

Los estilos APA, Harvard, Vancouver, ISO, etc.

6

Duddeck, Helmut. "E. Pretsch, P. B�hlmann, C. Affolter. Structure determination of organic compounds?Tables of spectra data. Springer, Berlin, 2000. 421 pp. plus CD-ROM. Price � 40.39, DM 79.00. ISBN 3 540 67815 8." Magnetic Resonance in Chemistry 40, no. 3 (2002): 247. http://dx.doi.org/10.1002/mrc.960.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

7

Tag El Din, El Sayed M., Faisal Sultan, Muhammad Usman Ghani, et al. "Some Novel Results Involving Prototypical Computation of Zagreb Polynomials and Indices for SiO4 Embedded in a Chain of Silicates." Molecules 28, no. 1 (2022): 201. http://dx.doi.org/10.3390/molecules28010201.

Texto completo

Resumen

A topological index as a graph parameter was obtained mathematically from the graph’s topological structure. These indices are useful for measuring the various chemical characteristics of chemical compounds in the chemical graph theory. The number of atoms that surround an atom in the molecular structure of a chemical compound determines its valency. A significant number of valency-based molecular invariants have been proposed, which connect various physicochemical aspects of chemical compounds, such as vapour pressure, stability, elastic energy, and numerous others. Molecules are linked with

Los estilos APA, Harvard, Vancouver, ISO, etc.

8

Stamou, Christina, Eleftheria Barouni, John C. Plakatouras, et al. "The “Periodic Table” of 1-methylbenzotriazole: Zinc(II) Complexes." Inorganics 11, no. 9 (2023): 356. http://dx.doi.org/10.3390/inorganics11090356.

Texto completo

Resumen

In an attempt to fill in the empty Zn position in the “Periodic Table” of 1-methylbenzotriazole (Mebta), reactions between Zn(II) sources and this ligand were carried out. The detailed synthetic studies provided access to complexes [ZnX2(Mebta)2] (X = Cl, 1; X = Br, 3; X = I, 4), (MebtaH)2[ZnCl4] (2), tet-[Zn(NO3)2(Mebta)2] (5), oct-[Zn(NO3)2(Mebta)2] (6), and [Zn(Mebta)4](Y)2 [Y = ClO4, 7; Y = PF6, 8]. Solid-state thermal decomposition of 2 leads to 1 in quantitative yield. The structures of 3, 4, 5, 6, and 7 were determined by single-crystal crystallography. The structures of the remaining c

Los estilos APA, Harvard, Vancouver, ISO, etc.

9

Nadzri, Ainol Hayah Ahmad, Dzulkiflee Ismail, Saravana Kumar Jayaram, Noor Zuhartini Md Muslim, and Wan Nur Syuhaila Mat Desa. "Precursor Profiling of Extracted Pseudoephedrine Using Gas Chromatography-Mass Spectrometry (GCMS) in Conjunction with Chemometric Procedure." Materials Science Forum 1025 (March 2021): 209–18. http://dx.doi.org/10.4028/www.scientific.net/msf.1025.209.

Texto completo

Resumen

Various methods for the clandestine manufacture of amphetamine-type stimulant (ATS) involve the extraction and subsequent reaction of pseudoephedrine salts with other essential chemicals. The precursor seized in clandestine laboratory operation is supplied from illegal sources or clandestinely extracted from decongestant tablets (despite the presence of excipients that serve to hamper re-extraction). This work reports the organic profiling of pseudoephedrine from a simulated clandestine extract of different decongestant tablets formulations. The study aims to determine the feasibility of the c

Los estilos APA, Harvard, Vancouver, ISO, etc.

10

Fletton, R. "E. Pretsch, T. Clerc, J. Seibl and W. Simon. Tables of Spectral Data for Structure Determination of Organic Compounds. Translation by K. Biemann. Springer-Verlag, Berlin, Heidelberg, New York, Tokyo, 1983. 316 pp. DM 32.00, $12.70." Magnetic Resonance in Chemistry 23, no. 1 (1985): 60. http://dx.doi.org/10.1002/mrc.1260230117.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

11

Lei, H., Z. L. Huang, H. Z. Wang, et al. "Two-photon absorption spectra of new organic compounds." Chemical Physics Letters 352, no. 3-4 (2002): 240–44. http://dx.doi.org/10.1016/s0009-2614(01)01463-4.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

12

Lyuts, A. E., V. Z. Gabdrakipov, I. A. Shlygina, and V. A. Petropavlov. "Photoelectron spectra of saturated nitrogen-containing organic compounds." Journal of Structural Chemistry 27, no. 4 (1987): 629–51. http://dx.doi.org/10.1007/bf00754016.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

13

Roth, E., G. A. Hope, D. P. Schweinsberg, W. Kiefer, and P. M. Fredericks. "Simple Technique for Measuring Surface-Enhanced Fourier Transform Raman Spectra of Organic Compounds." Applied Spectroscopy 47, no. 11 (1993): 1794–800. http://dx.doi.org/10.1366/0003702934065939.

Texto completo

Resumen

A silver surface, suitable for Fourier transform surface-enhanced Raman scattering (FT-SERS), has been prepared by subjecting a polished silver surface to an oxidation-reduction cycle in an electrochemical cell with KCl solution as the electrolyte. The surface produced by this method is shown, by scanning electron microscopy, to be very rough. The preparation of this surface is quite reproducible because the significant parameters of starting surface, electrolyte concentration, and potential can all be well controlled. After removal from the cell followed by washing and drying, organic compoun

Los estilos APA, Harvard, Vancouver, ISO, etc.

14

Florêncio, M. H., M. F. Duarte, A. M. M. de Bettencourt, M. L. Gomes, and L. F. Vilas Boas. "Electrospray Mass Spectra of Arsenic Compounds." Rapid Communications in Mass Spectrometry 11, no. 5 (1997): 469–73. http://dx.doi.org/10.1002/(sici)1097-0231(199703)11:5<469::aid-rcm831>3.0.co;2-7.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

15

Elazar, Meyer. "Preparation of Intermediates for Organic Synthsis." Technium BioChemMed 6 (December 19, 2023): 73–91. http://dx.doi.org/10.47577/biochemmed.v6i.10421.

Texto completo

Resumen

Several synthetic methods are described for the preparation of compounds such as derivatives of natural amino acids, unnatural amino acids, amino esters, oxime esters and amino amides that may serve as intermediates in the synthesis of active pharmaceutical ingredients (APIs) or drugs. The compounds described herein are produced in high yield and purity and the synthetic procedures are detailed along with the NMR spectra of the compounds and useful chemical data relating to these compounds.

Los estilos APA, Harvard, Vancouver, ISO, etc.

16

Gupta, Pradeep Kumar, and Kishor Arora. "Studies on Simulation of Spectra of Some Organic Compounds." Oriental Journal of Chemistry 35, no. 6 (2019): 1655–68. http://dx.doi.org/10.13005/ojc/350606.

Texto completo

Resumen

Quantum chemical viz. ab initio or semi-empirical based simulation studies are now prevailing among workers / scientists pursuing their studies in theoretical chemistry. These studies provide better insight for the compounds so far as the studies of their structural orother parameters are concern. Studies involving the packages developed on the basis of ab-initio or semi-empirical methods are proven to be more effective and as a better tool because of number of their advantages. The present communication includes the studies on synthesis or procurement along with the simulation of spectra viz.

Los estilos APA, Harvard, Vancouver, ISO, etc.

17

Sarre, Peter J. "Organic compounds as carriers of the diffuse interstellar bands." Proceedings of the International Astronomical Union 4, S251 (2008): 49–56. http://dx.doi.org/10.1017/s1743921308021169.

Texto completo

Resumen

AbstractThe diffuse interstellar bands appear as absorption features in spectra of reddened stars and lie mostly in the visible region of the spectrum. The first examples were recorded photographically nearly one hundred years ago and despite a huge amount of observational, theoretical and laboratory effort the spectra remain unassigned. Most researchers believe that organic material is responsible for the absorptions, the most popular form being polycyclic aromatic (hydro)carbon (PAH) structures. This article reviews briefly the main characteristics of the spectrum, describes some current res

Los estilos APA, Harvard, Vancouver, ISO, etc.

18

George, Lisa, K. Sankaran, K. S. Viswanathan, and C. K. Mathews. "Matrix-Isolation Infrared Spectroscopy of Organic Phosphates." Applied Spectroscopy 48, no. 1 (1994): 7–12. http://dx.doi.org/10.1366/0003702944027705.

Texto completo

Resumen

Matrix-isolation infrared spectra of trimethyl phosphate (TMP), triethyl phosphate (TEP), and tri- n-butyl phosphate (TBP), in argon and nitrogen matrices, are reported for the first time. The peak widths of the sharpest features in our matrix-isolated spectra are typically 2 cm−1, compared with peak widths of 40 cm−1 seen in liquids for these compounds. Comparison with the vapor-phase spectrum of TMP reported earlier indicates that TMP is trapped in two different conformations in these matrices. Similar spectra were also obtained for TEP. Our matrix-isolated spectra indicate that the intramol

Los estilos APA, Harvard, Vancouver, ISO, etc.

19

Ayatollahi, Shakiba, Daina Kalnina, Weihua Song, Barbara A. Cottrell, Michael Gonsior, and William J. Cooper. "Recent advances in structure and reactivity of dissolved organic matter: radiation chemistry of non-isolated natural organic matter and selected model compounds." Water Science and Technology 66, no. 9 (2012): 1941–49. http://dx.doi.org/10.2166/wst.2012.404.

Texto completo

Resumen

The importance of natural organic matter (NOM) as a source of carbon in natural waters, as the source of reactive oxygen species, or for the complications its presence causes in treatment of natural waters, is undeniable. Recent studies have also pointed to the major photochemical role of triplet excited state of natural organic matter in the environmental fate of pharmaceutical and personal care products (PPCPs) in waters. However, the characterization of NOM is problematic due to its complex molecular structure. One approach to better understand NOM chemistry is the use of model compounds. A

Los estilos APA, Harvard, Vancouver, ISO, etc.

20

Vervoort, Sander, and Marcus Wolff. "Multivariate Spectra Analysis: PLSR vs. PCA + MLR." Engineering Proceedings 2, no. 1 (2020): 83. http://dx.doi.org/10.3390/ecsa-7-08226.

Texto completo

Resumen

For mixtures of compounds with very similar spectral features, common for larger organic molecules, multivariate analysis (MVA) methods can be applied to determine the concentration of the individual components. We analyzed photoacoustic spectra of mixtures of different volatile organic compounds with and without different feature selection and feature projection methods. These include: Multiple Linear Regression (MLR), Principal Component Analysis (PCA), Partial Least Squares Regression (PLSR) and Random Forest Algorithm (RFA). Even though PLSR provided the best prediction accuracy, the other

Los estilos APA, Harvard, Vancouver, ISO, etc.

21

Coleman, W. M., Bert M. Gordon, and Brian M. Lawrence. "Examinations of the Matrix Isolation Fourier Transform Infrared Spectra of Organic Compounds: Part XII." Applied Spectroscopy 43, no. 2 (1989): 298–304. http://dx.doi.org/10.1366/0003702894203273.

Texto completo

Resumen

Matrix isolation Fourier transform infrared spectra (MI/FT-IR), mass spectra (MS), carbon-13 Nuclear Magnetic Resonance (13C-NMR) spectra, condensed-phase infrared spectra, and vapor-phase infrared (IR) spectra are presented for a series of terpene compounds. Subtle differences in positional and configurational isomers commonly found with terpenes could be easily detected by the MI/FT-IR spectra. The results are comparable in some aspects to those obtainable from 13C-NMR and thin-film IR; however, most importantly, they are acquired at the low nanogram level for MI/FT-IR, as compared to the mi

Los estilos APA, Harvard, Vancouver, ISO, etc.

22

Leščinskis, Oskars, Ruta Švinka, and Visvaldis Švinka. "Adsorption of Organic Compounds on Refined Latvian Clay." Key Engineering Materials 788 (November 2018): 83–88. http://dx.doi.org/10.4028/www.scientific.net/kem.788.83.

Texto completo

Resumen

Clays are materials consisting of clay minerals and non-clay minerals. Clay mineral fraction is considered to be a nanofraction. Clay minerals can be used for water purification and treatment. Description and characterization of 3 different Latvian clay nanosized minerals from 3 different geological periods (clay Liepa from Devonian period, clay Vadakste from Triassic period and clay Apriki from Quaternary period) as well as their adsorption capacity concerning organic compounds such as methyl orange and rhodamine B are summarized. Nanosized clay mineral particles were obtained using sedimenta

Los estilos APA, Harvard, Vancouver, ISO, etc.

23

Arora, Kishor. "Simulation of IR Spectra of Some Organic Compounds-A Review." IOSR Journal of Applied Chemistry 6, no. 1 (2013): 10–24. http://dx.doi.org/10.9790/5736-0611024.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

24

Carnimeo, Ivan, Cristina Puzzarini, Nicola Tasinato, et al. "Anharmonic theoretical simulations of infrared spectra of halogenated organic compounds." Journal of Chemical Physics 139, no. 7 (2013): 074310. http://dx.doi.org/10.1063/1.4817401.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

25

Leber, Phyllis A. "Spectra Interpretation of Organic Compounds (Pretsch, Erno; Clerc, Jean Thomas)." Journal of Chemical Education 75, no. 6 (1998): 695. http://dx.doi.org/10.1021/ed075p695.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

26

Varmuza, K., P. N. Penchev, and H. Scsibrany. "Maximum Common Substructures of Organic Compounds Exhibiting Similar Infrared Spectra." Journal of Chemical Information and Computer Sciences 38, no. 3 (1998): 420–27. http://dx.doi.org/10.1021/ci9700889.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

27

Varmuza, K., P. Penchev, F. Stancl, and W. Werther. "Systematic structure elucidation of organic compounds by mass spectra classification." Journal of Molecular Structure 408-409 (June 1997): 91–96. http://dx.doi.org/10.1016/s0022-2860(96)09654-8.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

28

Förner, Wolfgang. "Theoretical vibrational spectra of organic ring compounds compared to experiment." International Journal of Quantum Chemistry 99, no. 4 (2004): 533–55. http://dx.doi.org/10.1002/qua.10849.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

29

Savoie, Carole, and Christian Reber. "Near-infrared and visible luminescence and absorption spectroscopy of low-coordinate organometallic rhenium compounds." Canadian Journal of Chemistry 74, no. 1 (1996): 28–31. http://dx.doi.org/10.1139/v96-003.

Texto completo

Resumen

Low-temperature absorption and luminescence spectra of four organorhenium compounds were measured in the visible and near-infrared spectral regions. Effects of the temperature, formal oxidation state, and the oxo-, bromo-, and organic ligands on the metal center are reported. The emission maxima of the four compounds show a large variation between 9000 and 14 200 cm−1. Stokes shifts show a smaller variation from 3700 to 4200 cm−1. Luminescence intensities are used to qualitatively characterize nonradiative relaxation processes. Key words: luminescence spectra, absorption spectra, organorhenium

Los estilos APA, Harvard, Vancouver, ISO, etc.

30

Prietzel, Jörg, and Wantana Klysubun. "Phosphorus K-edge XANES spectroscopy has probably often underestimated iron oxyhydroxide-bound P in soils." Journal of Synchrotron Radiation 25, no. 6 (2018): 1736–44. http://dx.doi.org/10.1107/s1600577518013334.

Texto completo

Resumen

Phosphorus (P) K-edge X-ray absorption near-edge structure (XANES) spectra of orthophosphate (oPO4) bound to soil FeIII minerals (e.g. ferrihydrite, goethite) show a pre-edge signal at 2148–2152 eV. It is unknown whether organic P bound to FeIII oxyhydroxides also show this feature. Otherwise, Fe-bound soil P may be underestimated by P K-edge XANES spectroscopy, because a large portion of Fe oxyhydroxide-bound P in soils is organic P. K-edge XANES spectra were obtained for different organic P compounds present in soils [inositol hexaphosphate (IHP), glucose-6-phosphate (G6P), adenosine triphos

Los estilos APA, Harvard, Vancouver, ISO, etc.

31

Papavassiliou, G. C., G. A. Mousdis, C. P. Raptopoulou, and A. Terzis. "Preparation and Characterization of [C6H5CH2 NH3]2PbI4, [C6H5CH2CH2SC(NH2)2]3 PbI5 and [C10H7CH2NH3]PbI3 Organic-Inorganic Hybrid Compounds." Zeitschrift für Naturforschung B 54, no. 11 (1999): 1405–9. http://dx.doi.org/10.1515/znb-1999-1112.

Texto completo

Resumen

The preparation, crystal structures, optical absorption spectra, and photoluminescence spectra of the title compounds are reported. The compounds were prepared in single crystal form. [C6H5CH2NH3]2PbI4 consists of anionic perovskite sheets of corner-sharing Pbl6 octahedra, which alternate with the C6H5CH2NH3+ sheets. [ C6H5CH2CH2SC(NH2)2]3 PbI5 consists of zig-zag chains of anionic corner sharing PbI6 octahedra separated by C6H5CH2CH2SC(NH2)2 cations. [C10H7CH2NH3]Pbl3 consists of twin chains of edge-sharing PbI6 octahedra separated by C10H7CH2NH3 cations. The compounds are thus low-dimensiona

Los estilos APA, Harvard, Vancouver, ISO, etc.

32

Guan, Haiyan, Mingbo Zhou, Bangshao Yin, Ling Xu та Jianxin Song. "Synthesis and characterization of π–extended “earring” subporphyrins". Beilstein Journal of Organic Chemistry 14 (30 липня 2018): 1956–60. http://dx.doi.org/10.3762/bjoc.14.170.

Texto completo

Resumen

A π-extended “earring” subporphyrin 3 was synthesized from β,β′-diiodosubporphyrin and diboryltripyrrane via a Suzuki–Miyaura coupling and following oxidation. Its Pd complex 3Pd was also synthesized and both of the compounds were fully characterized by 1H NMR, MS and X-ray single crystal diffraction. The 1H NMR spectra and single crystal structures revealed that aromatic ring current did not extend to the “ear” in both of the two compounds. Their UV–vis/NIR spectra were recorded and the absorption of both compounds is extended to the NIR region and that the absorption of 3Pd is further red-sh

Los estilos APA, Harvard, Vancouver, ISO, etc.

33

Murphy, Kathleen R., Colin A. Stedmon, Philip Wenig, and Rasmus Bro. "OpenFluor– an online spectral library of auto-fluorescence by organic compounds in the environment." Anal. Methods 6, no. 3 (2014): 658–61. http://dx.doi.org/10.1039/c3ay41935e.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

34

Coleman, W. M., and Bert M. Gordon. "Examinations of the Matrix Isolation Fourier Transform Infrared Spectra of Organic Compounds: Part XV." Applied Spectroscopy 43, no. 6 (1989): 1004–8. http://dx.doi.org/10.1366/0003702894204047.

Texto completo

Resumen

Matrix isolation Fourier transform infrared spectra (MI/FT-IR) of a series of essential oil components have been described. Clear, well-defined differences were detected in the MI/FT-IR spectra of compounds having minor differences in their structure. A library search routine was found to correctly identify components of interest when visual differences were not clearly evident. The presence of discrete conformers in the argon matrix resulted in the presence of split absorptions in the carbonyl band for selected compounds.

Los estilos APA, Harvard, Vancouver, ISO, etc.

35

Fu, Hua, Yu-Fen Zhao, Hong-Zhan Xiao, and Jing-Zun Wang. "Mass spectra of aminoacyl adenylate pentacoordinated phosphorus compounds." Rapid Communications in Mass Spectrometry 13, no. 14 (1999): 1477–79. http://dx.doi.org/10.1002/(sici)1097-0231(19990730)13:14<1477::aid-rcm670>3.0.co;2-5.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

36

Uriarte, Eugenio, Fernanda Borges, and Alexandra Gaspar. "Synthesis and structural elucidation of a series of isoflavones-based on FPR antagonists." International Journal of Bioorganic and Medicinal Chemistry 1, no. 1 (2021): 10–16. http://dx.doi.org/10.55124/bmc.v1i1.22.

Texto completo

Resumen

 Isoflavones are naturally occurring compounds well-known for their beneficial role in several diseases, such as cancer and inflammation. Recently some isoflavones derivatives were reported as potent and competitive antagonists of formyl peptide receptors (FPRs) with an important role in regulating the inflammatory process. As a result of their biological activities, there is a huge interest in developing synthetic procedures to obtain isoflavones. Surprisingly, and as far as our knowledge goes, the synthetic work and full characterisation of the isoflavones described as FPR antagonists

Los estilos APA, Harvard, Vancouver, ISO, etc.

37

Coleman, W. M., and Bert M. Gordon. "Examinations of the Matrix Isolation Infrared Spectra of Organic Compounds: PART XIII." Applied Spectroscopy 43, no. 2 (1989): 305–10. http://dx.doi.org/10.1366/0003702894203246.

Texto completo

Resumen

Matrix isolation Fourier transform infrared (MI/FT-IR) spectra have been collected on a series of internal alkenes, a series of hydroxy-substituted ketones, and a series of hydroxy-substituted esters. Assignments of double bond position and geometry are possible in the alkenes, due to the resolution of absorption bands of very similar energies. The location of the absorption bands for the alkenes was found to be very similar to the values found for the vapor-phase and condensed-phase spectra. Multiple carbonyl absorptions have been found in the MI/FT-IR spectra of the hydroxy ketones and hydro

Los estilos APA, Harvard, Vancouver, ISO, etc.

38

Filarowski, Aleksander, Aleksander Koll, and Lucjan Sobczyk. "Vibrational Spectra of o-hydroxyphenyl Schiff Bases and Related Compounds." Current Organic Chemistry 13, no. 3 (2009): 287–98. http://dx.doi.org/10.2174/138527209787314823.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

39

Berezin, V. I., N. V. Bogachev, V. V. Ganin, and V. V. Nechaev. "Vibrational spectra and force field of azacyclic compounds. I. Pyrrole." Chemistry of Heterocyclic Compounds 29, no. 5 (1993): 556–59. http://dx.doi.org/10.1007/bf00534468.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

40

SAITO, Keiji, Yoshiaki ISHIDA, and Tokio OOSHIMA. "Computer-assisted structural analysis of organic compounds from 13C-NMR spectra." Bunseki kagaku 43, no. 7 (1994): 517–24. http://dx.doi.org/10.2116/bunsekikagaku.43.517.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

41

Zheng, Jian, Akihiro Takeda, and Naoki Furuta. "Investigating the electrospray mass spectra of inorganic and organic antimony compounds." Journal of Analytical Atomic Spectrometry 16, no. 1 (2001): 62–67. http://dx.doi.org/10.1039/b007374l.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

42

Penchev, Plamen N., and Kurt Varmuza. "Characteristic substructures in sets of organic compounds with similar infrared spectra." Computers & Chemistry 25, no. 3 (2001): 231–37. http://dx.doi.org/10.1016/s0097-8485(00)00096-6.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

43

Carss, Steven A., Robin K. Harris, Peter Holstein, Barry J. Say, and Richard A. Fletton. "High-resolution fluorine-19 NMR spectra of solid fluorinated organic compounds." Journal of the Chemical Society, Chemical Communications, no. 20 (1994): 2407. http://dx.doi.org/10.1039/c39940002407.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

44

Zheng, Guorong, Wei Li, Zixing Wang, and Ping Lu. "Organosilicon Compounds with Blue Photoluminescence Properties." Australian Journal of Chemistry 57, no. 8 (2004): 811. http://dx.doi.org/10.1071/ch04059.

Texto completo

Resumen

A series of π-conjugated compounds and related Si compounds with blue photoluminescent properties have been prepared. Structures of products were confirmed by NMR spectra and mass spectrometry. Photoluminescent properties are discussed. Based on luminescent properties, these Si compounds might find utility as emitters in organic light-emitting diode displays.

Los estilos APA, Harvard, Vancouver, ISO, etc.

45

Coleman, W. M., and Bert M. Gordon. "Examinations of the Matrix Isolation Fourier Transform Infrared Spectra of Organic Compounds: Part XVI." Applied Spectroscopy 43, no. 6 (1989): 1008–16. http://dx.doi.org/10.1366/0003702894203895.

Texto completo

Resumen

Information concerning the matrix isolation Fourier transform infrared spectra of a series of alkanes, esters, lactones, lactams, phenols, alcohols, amides, alkenes, and ketones is presented. A comparison between the characteristics of the spectra in two matrices (argon and xenon) as well as in the absence of any matrix (bare gold disk) is drawn. The impact of these matrices on the characteristics of the IR spectra is compared with the impact observed when spectra are gathered in the vapor phase as well as the condensed phase/solid state. For the majority of compounds studied, the major absorp

Los estilos APA, Harvard, Vancouver, ISO, etc.

46

Li, Na, Liyan Liu, Huiqing Luo, Huaqiao Wang, Depo Yang, and Feng He. "Flavanone-Based Fluorophores with Aggregation-Induced Emission Enhancement Characteristics for Mitochondria-Imaging and Zebrafish-Imaging." Molecules 25, no. 14 (2020): 3298. http://dx.doi.org/10.3390/molecules25143298.

Texto completo

Resumen

Fluorophores with aggregation-induced emission enhancement (AIEE) characteristics applied in bioimaging have attracted more and more attention in recent years. In this work, a series of flavanone compounds with AIEE characteristics was developed and applied to fluorescence imaging of mitochondria and zebrafish. The compounds were readily prepared by the thermal dehydration of chalcone that was obtained by the reaction of o-hydroxyacetophenone and benzaldehyde. Two of these compounds showed significant AIEE characteristics by fluorescence performance experiments, including optical spectra, fluo

Los estilos APA, Harvard, Vancouver, ISO, etc.

47

PAPAVASSILIOU, G. C., G. A. MOUSDIS, I. B. KOUTSELAS, and G. J. PAPAIOANNOU. "EXCITONIC BANDS IN THE PHOTOCONDUCTIVITY SPECTRA OF SOME ORGANIC-INORGANIC HYBRID COMPOUNDS BASED ON METAL HALIDE UNITS." International Journal of Modern Physics B 15, no. 28n30 (2001): 3727–31. http://dx.doi.org/10.1142/s0217979201008524.

Texto completo

Resumen

The photoconductivity (PC) spectra of the compounds CH3NH3PbI3 , [CH3NH3][CH3C6H4CH2NH3]2Pb2I7 , [CH3C6H4CH2NH3]2PbI4 , [H2NC(I)=NH2]3PbI5 as well as the spectra of similar compounds bases on C10H21SC(NH2)2 , H3N(CH2)6NH3 , C14H9CH2SC(NH2)2 , SnI4 , PbClxI4-x and PbBrxI4-x are described. The position, intensity and shape of the PC bands depend on the dimensionality (or size) of the inorganic network as well as on the nature of metal halide and the organic groups. Excitonic features are discussed.

Los estilos APA, Harvard, Vancouver, ISO, etc.

48

Wu, Zhi-Ping, Gui-Jun Liu, Cai-Cai Zhu, Zhi-Mei Li, Xi-Cun Gao, and Qian-Yong Cao. "Violet-blue- or pure-blue-emitting triphenylamine derivatives: synthesis and properties." Canadian Journal of Chemistry 91, no. 11 (2013): 1043–47. http://dx.doi.org/10.1139/cjc-2012-0473.

Texto completo

Resumen

We report the synthesis and optoelectronic properties of a series of nine triphenylamine derivatives. They were synthesized by Suzuki cross-coupling reactions and characterized by elemental analysis, nuclear magnetic resonance, ultraviolet visible absorption spectra, fluorescence spectra, and cyclic voltammetry. All compounds exhibit reversibly electrochemical behavior. In solid state, compounds 5 and 9 emit near violet blue and compounds 1, 2, 4, 6, 7, and 8 emit deep blue or pure blue and compound 3 emits green. Of all of these compounds, compounds 1, 3, 4, and 8 exhibit high fluorescence qu

Los estilos APA, Harvard, Vancouver, ISO, etc.

49

Kwok, Sun. "Synthesis of Organic Compounds in the Circumstellar Environment." Symposium - International Astronomical Union 213 (2004): 181–84. http://dx.doi.org/10.1017/s0074180900193234.

Texto completo

Resumen

Recent developments in infrared spectroscopy have made possible the detection of the stretching and bending modes of organic molecules in space. Infrared emission bands of the C-C and C-H stretching and bending modes of aromatic compounds have been widely observed in carbon-rich planetary nebulae, the descendents of carbon stars. Infrared spectra of the transition objects between carbon stars and planetary nebulae, called proto-planetary nebulae, have shown definite signatures of a variety of aliphatic side-groups attached to aromatic rings. This suggests that molecular synthesis is actively o

Los estilos APA, Harvard, Vancouver, ISO, etc.

50

Xu, Xiaolin, Zesheng Li, Runmei Yang, et al. "Crepidatumines C and D, Two New Indolizidine Alkaloids from Dendrobium crepidatum Lindl. ex Paxt." Molecules 24, no. 17 (2019): 3071. http://dx.doi.org/10.3390/molecules24173071.

Texto completo

Resumen

Two new indolizidine alkaloids, crepidatumines C (1) and D (2), together with crepidine (3), isocrepidamine (4), and crepidamine (5) were isolated from the Dendrobium crepidatum Lindl. ex Paxt. X-ray diffraction experiments established the absolute configurations of known compounds 3 and 4. The planar structures and relative configurations of new compounds 1 and 2 were elucidated by extensive spectra analysis including HR-ESI-MS, NMR (1H, 13C, 1H-1H COSY, HSQC, HMBC, and NOESY spectra), and the absolute configurations of 1 and 2 were suggested on the basis of possible biosynthetic pathways. Th

Los estilos APA, Harvard, Vancouver, ISO, etc.

Ofrecemos descuentos en todos los planes premium para autores cuyas obras están incluidas en selecciones literarias temáticas. ¡Contáctenos para obtener un código promocional único!