نتایج جستجو برای: uv vis spectra

تعداد نتایج: 180495  

Journal: :Physical chemistry chemical physics : PCCP 2009
Marc von Hobe Fred Stroh Helmut Beckers Thorsten Benter Helge Willner

UV/Vis absorption spectra of ClOOCl isolated in neon matrices were measured in the wavelength range 220-400 nm. The purity of the trapped samples was checked by infrared and UV/Vis matrix spectroscopy as well as low-temperature Raman spectroscopy. At wavelengths below 290 nm, the results agree with the UV spectrum recently published by Pope et al. [J. Phys. Chem. A, 2007, 111, 4322-4332]. Howev...

Journal: :Organic letters 2006
Yoshihiro Matano Takashi Nakabuchi Tooru Miyajima Hiroshi Imahori Haruyuki Nakano

A phosphorus-containing hybrid porphyrin was successfully prepared via the BF3-promoted dehydrative condensation between sigma4-phosphatripyrrane and 2,5-bis[hydroxy(phenyl)methyl]thiophene. The NMR and UV-vis absorption spectra, electrochemical measurements, and DFT calculations revealed that the sigma3-P,N2,S-hybrid porphyrin exhibits high aromaticity as an 18pi-electron system in terms of bo...

2011
Tomasz Pospieszny Marcin Szymankiewicz Elżbieta Wyrzykiewicz

Six new 2-o-(m- and p-)chlorobenzylthio-6-methyl-5-piperidino-(or morpholino-) methyluracils have been prepared. The structures of these compounds were confirmed by spectroscopic (FT-IR, UV-Vis, (1)H NMR, (13)C NMR, and HMBC) and elemental analyses. Estimation of pharmacotherapeutic potential has been made for synthesized compounds on the basis of prediction of activity spectra for substances (...

Journal: :Soft matter 2016
Yuxia Gao Jie Hao Jindan Wu Ying Li Yuan Lin Jun Hu Yong Ju

Taking a natural triterpenoid as the building block, we have regulated a pyridinium-functionalized methyl glycyrrhetate (C4-MGP) into P-type helices in water primarily driven by hydrophobic forces. By analysing their temperature-dependent CD and UV-Vis spectra, these hierarchical chiral assemblies were found to be formed in a cooperative supramolecular polymerization manner.

Journal: :Chemical communications 2013
Hans Peter Reisenauer Jarosław Romański Grzegorz Mlostoń Peter R Schreiner

The atmospherically highly relevant methylsulfinyl radical CH3(O)S˙ was generated thermally under flash pyrolysis conditions and isolated in Ar matrices at 10 K; the allyl radical is a byproduct. CH3(O)S˙ and its D3- and (13)C-isotopologues were characterized through the excellent agreement between experimental and computed IR and UV/Vis spectra.

2016
Tian Li Zhengjun Cheng Lijun Cao Xiaohui Jiang Lei Fan

In this data article, the fluorescence, UV-vis absorption and FTIR spectra data of BSA-AR1/AG50 system were presented, which were used for obtaining the binding characterization (such as binding constant, binding distance, binding site, thermodynamics, and structural stability of protein) between BSA and AR1/AG50.

2014
Motaleb Ghasemian Ali Kakanejadifard Farideh Azarbani Abedin Zabardasti Somayeh Shirali Zeinab Saki Sahar Kakanejadifard

The azo-azomethine dyes were prepared via condensation reaction of 2,4-dichloro-6-methoxy-1,3,5-triazine with azo couled 2-(2-mercaptophenylimino)methyl)-4-(aryldiazenyl)phenol. The UV–vis spectra indicated positive solvatochromism in synthesized compound are dependent on the substitution, solvent, pH and temperature. Some compounds exhibited antibacterial, antioxidant activities.

Journal: :Organic & biomolecular chemistry 2008
Hideyuki Yoshiyama Norio Shibata Takefumi Sato Shuichi Nakamura Takeshi Toru

A novel covalently linked binuclear phthalocyanine 1 was synthesized by the "double-click" reaction. The UV-vis and fluorescence spectra and electrochemistry revealed that the geometry of 1 is a closed clamshell conformation in which a strong electronic interaction is observed between the two Pc moieties.

2009
Viorica MUŞAT Monica MAZILU

This paper presents the microstructure, optical and electrical properties of zinc oxide nanorodlike structures deposed on glass substrate by dip-coating method. The crystalline phases and morphology of 1-D nanostructured materials have been investigated using X-ray diffraction and scanning electron microscopy (SEM) techniques. The UV-VIS-NIR spectra and the electrical properties were also measu...

Journal: :Bioorganic & medicinal chemistry letters 2007
Yuya Egawa Ryota Gotoh Satoshi Niina Jun-ichi Anzai

The phenylboronic acids substituted with an azo group on the ortho-position show a significant change in UV-vis spectra upon sugar binding. A new mechanism for the spectral change of the dyes is proposed based on the formation and cleavage of B-N dative bond between boronic acid group and azo group.

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