Voltammetric, EPR and UV–VIS–NIR spectroscopic studies associated with the one-electron oxidation of C60 and C70 in 1,1′,2,2′-tetrachloroethane containing trifluoromethanesulfonic acid

2001 ◽  
Vol 3 (13) ◽  
pp. 2588-2594 ◽  
Author(s):  
Richard D. Webster ◽  
Graham A. Heath
Keyword(s):  
Spectroscopic Studies ◽  
Trifluoromethanesulfonic Acid ◽  
The One

Femtosecond Spectroscopic Studies of the One- and Two-Photon Excited-State Dynamics of 2,2,17,17-Tetramethyloctadeca-5,9,13-trien-3,7,11,15-tetrayne:  A Trimeric Oligodiacetylene

2006 ◽  
Vol 110 (40) ◽  
pp. 11435-11439 ◽  
Author(s):  
Grzegorz M. Balkowski ◽  
Michiel Groeneveld ◽  
Hong Zhang ◽  
Cindy C. J. Hendrikx ◽  
Michael Polhuis ◽  
...  
Keyword(s):  
Excited State ◽  
Spectroscopic Studies ◽  
Excited State Dynamics ◽  
Two Photon ◽  
The One

scholarly journals Deuterium NMR and Raman Spectroscopic Studies on Conformational Behavior of Lipophilic Chains in the C12E3 / Decane / Water System

2002 ◽  
Vol 57 (6-7) ◽  
pp. 320-326 ◽  
Author(s):  
Akimitsu Tonegawa ◽  
Ayako Michiue ◽  
Takashi Masuda ◽  
Keiichi Ohno ◽  
Hiroatsu Matsuura ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Order Parameter ◽  
Water System ◽  
High Mobility ◽  
Spectroscopic Studies ◽  
Surfactant Molecule ◽  
Deuterium Nmr ◽  
Cross Sectional ◽  
Structure Changes ◽  
The One

The order parameter and the conformations of the lipophilic chains in the C12E3 / decane / water ternary system have been studied by deuterium NMR and C-D stretching Raman spectroscopy. The order parameter and the trans fraction of the C-C bond of decane molecules decrease steadily or remain nearly constant with increasing decane concentration without noticeable changes at the phase transitions. On addition of decanemolecules to the C12E3 /water system, the effective volume of the lipophilic part of a single surfactant molecule increases as a result of the penetration of the added decane molecules into the lipophilic layer, leading to a high mobility of the alkyl chain. To minimize the resulting increase in the effective cross-sectional area of a surfactant molecule, the molecular chains of the surfactant reorient remarkably in the concentration region near the phase transitions, and the shape of the self-organizing structure changes to the one with a larger packing parameter.

Polymorphism and structure–property relations

2020 ◽  
pp. 273-341
Author(s):  
Joel Bernstein
Keyword(s):  
Second Harmonic ◽  
Three Dimensional ◽  
Spectroscopic Studies ◽  
Photochemical Reactions ◽  
Structure Property ◽  
Time Resolved ◽  
Property Relations ◽  
High Pressure Studies ◽  
Organic Magnetic Materials ◽  
The One

Chapter 6 deals with the connection between the structure and properties of solids as revealed and studied in polymorphic systems. The subject is divided into properties that depend on the one hand on the bulk—that is, the three-dimensional arrangement of the molecules and the interactions among them—and on the other hand the consideration of the crystal as an “oriented gas” serving to act as a matrix for the molecules to permit the study of molecular properties. Among the properties described in the former category are electrical conductivity, organic magnetic materials, photovoltaicity and photoconductivity, second harmonic generation, chromoisomerism, photochromism, thermochromism and mechanochromism, and the mechanosalient effect. The latter category includes a discussion of spectroscopic studies (infrared, Raman, and ultraviolet/visible), excimer phenomena, time-resolved studies of excited states, photochemical reactions and thermal and gas reactions, along with a variety of emission phenomena. The chapter closes with a brief survey of rapidly emerging and developing high pressure studies

In Situ Raman Spectroscopic Studies of Liquid Carbon Tetrachloride (CCl4) Under Static and Laser-Driven Shock Compression

2019 ◽  
Vol 73 (12) ◽  
pp. 1420-1427
Author(s):  
Usha Rao ◽  
Shivanand Chaurasia ◽  
C. D. Sijoy ◽  
Vinayak Mishra ◽  
M. N. Deo
Keyword(s):  
Carbon Tetrachloride ◽  
Shock Compression ◽  
Spectroscopic Studies ◽  
Raman Signal ◽  
Time Resolved ◽  
Raman Spectroscopic ◽  
Bending Mode ◽  
Raman Modes ◽  
Diamond Anvil ◽  
The One

High pressure (up to ∼2.2 GPa) Raman scattering studies were performed in carbon tetrachloride (CCl4) under static and dynamic compressions using diamond anvil cell (DAC) and laser-driven shock methods, respectively, and their results are compared. The laser-driven shock experiments were conducted in a glass-confined target geometry. The symmetric stretching mode ν1, symmetric bending mode ν2, and asymmetric bending mode ν4 blueshifts with pressure. Mode Gruneisen parameters were obtained for the above Raman modes. Time-resolved Raman spectroscopic (TRRS) studies were performed under laser-driven shock compression at different delay times. Shock velocity deduced from the intensity ratios of Raman signal scattered from unshocked and shocked regions of symmetric stretching mode is in agreement with the one obtained from one-dimensional hydrodynamic simulations.

The Selective Activation of Telluro- over Seleno-β-D-glucopyranosides as Glycosyl Donors: a Reactivity Scale for Various Telluro, Seleno and Thio Sugars

1997 ◽  
Vol 50 (3) ◽  
pp. 237 ◽  
Author(s):  
Robert V. Stick ◽  
D. Matthew G. Tilbrook ◽  
Spencer J. Williams
Keyword(s):  
Trifluoromethanesulfonic Acid ◽  
Selective Activation ◽  
The One ◽  
Glycosyl Donors

Phenyl tetra-O-benzoyl-1-telluro-β-D-glucopyranoside, when treated with 1,2:3,4-di-O-isopropylidene-α-D-galactose in the presence of N-iodosuccinimide and trifluoromethanesulfonic acid, immediately forms the expected β-disaccharide derivative. A subsequent experiment involving both a telluroglycoside and a selenoglycoside as donors with the one alcohol acceptor showed complete preference for the telluroglycoside. This result has led to an extension of the investigation to establish a ‘reactivity scale’ for various telluro, seleno and thio sugars.

scholarly journals Crystal structure, thermal behavior and spectroscopic studies of a new organic hydrogen arsenate

2013 ◽  
Vol 9 (2) ◽  
pp. 1953-1964
Author(s):  
Sami Soukrata ◽  
Mohamed Belhouchet ◽  
Karim Adil ◽  
Tahar Mhiri
Keyword(s):  
Crystal Structure ◽  
Spectroscopic Studies ◽  
X Ray Diffraction ◽  
Orthorhombic Space Group ◽  
Protonic Conduction ◽  
Structure Directing Agent ◽  
One Dimensional ◽  
X Ray ◽  
Dimensional Network ◽  
The One

The present paper undertakes the study of a title organic-inorganic hybrid material 2-amino-3-benzyloxy pyridinium dihydrogenmonoarsenate, [C12H13N2O]H2AsO4, which has been synthesized by slow evaporation at room temperature using 2-amino-3-benzyloxypyridine as the structure-directing agent. The structure was determined by single-crystal X-ray diffraction at 296 K. This compound is crystallized in the noncentrosymmetric orthorhombic space group P212121 with the lattice parameters a = 4.89 (7), b = 10.41 (1), c = 26.79 (3) Å, V = 1364.3 (3) Å3, and Z = 4. The crystal structure has been determined and refined to R1 = 0.0363 and wR2 = 0.1246 using 5438 independent reflections. The atomic arrangement can be described by infinite anionic chains running parallel to the [100] direction. The organic entities are located between these chains. H-bonds connecting the different species play an important role in the one-dimensional network cohesion. This compound is also characterized by solid-state 13C MAS NMR, IR, Raman spectroscopy and TG-ATD thermal analysis. Moreover, protonic conduction of this compound determined by impedance has been studied in the temperature range 299 - 403 K.

In situ spectroscopic studies of the one-pot synthesis of composition-controlled Cu–Ni nanowires with enhanced catalytic activity

2018 ◽  
Vol 42 (15) ◽  
pp. 13044-13053 ◽  
Author(s):  
Masanao Ishijima ◽  
Jhon L. Cuya Huaman ◽  
Shun Yokoyama ◽  
Kozo Shinoda ◽  
Masahito Uchikoshi ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Formation Mechanism ◽  
Spectroscopic Studies ◽  
Reduction Technique ◽  
One Pot ◽  
Spectroscopic Measurements ◽  
One Pot Synthesis ◽  
The One ◽  
Alcohol Reduction

Development of a novel alcohol reduction technique for the one-pot synthesis of Cu–Ni NWs by elucidating the formation mechanism by using in situ spectroscopic measurements.

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