Zobrazeno 1 - 10
of 83
pro vyhledávání: '"James W. Emsley"'
Autor:
William Levason, James W. Emsley, Gillian Reid, Giuseppina De Luca, John M. Dyke, Victoria K. Greenacre, Francesco M. Monzittu
The reaction of PMe 3 or PPh 3 with PF 5 in anhydrous CH 2Cl 2 or hexane forms the white, moisture-sensitive complexes [PF 5(PR 3)] (R = Me, Ph). Similar reactions involving the diphosphines o-C 6H 4(PR 2) 2 afford the complexes [PF 4{o-C 6H 4(PR 2)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::57e9231abae52feb01622af4b7ce9fc4
https://eprints.soton.ac.uk/438513/
https://eprints.soton.ac.uk/438513/
The coordination chemistry of the neutral diphosphines, R2P(CH2)2PR2 (R = Me or Et) and o-C6H4(PR'2)2 (R' = Me or Ph), and the diarsine, o-C6H4(AsMe2)2, toward the Lewis acidic BX3 (X = F, Cl, Br, and I) fragments is reported, including several rare
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::971e21f4103c12ce19fe868af3e22d18
https://eprints.soton.ac.uk/401727/
https://eprints.soton.ac.uk/401727/
Autor:
Barbara Hoff, Anne S. Ulrich, Giuseppina De Luca, James W. Emsley, Ulrich H.N. Dürr, Sergii Afonin
Publikováno v:
The Journal of Physical Chemistry B. 116:4769-4782
Solid-state (19)F-NMR spectroscopy is frequently used to analyze the structure and dynamics of lipophilic drugs and peptides embedded in biomembranes. The homonuclear dipolar couplings of trifluoromethyl (CF3) labels can provide valuable parameters s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::80e67c53e4770220e42bec4fd05b61a0
https://doi.org/10.1021/jp212339k
https://doi.org/10.1021/jp212339k
Autor:
James W. Emsley
Publikováno v:
Liquid Crystals. 37:913-921
Observed residual, inter-nuclear dipolar couplings are averages over vibrational motion. Calculations of this effect are made on the assumption that the vibrational modes can be approximated as harmonic in order to demonstrate the dependence on the o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6967c512cc40acf9ab66c79ffdeba5f4
https://doi.org/10.1080/02678292.2010.481911
https://doi.org/10.1080/02678292.2010.481911
Autor:
Salvatore Mamone, Chi-Duen Poon, Moreno Lelli, Juha Vaara, Leah M. Heist, James W. Emsley, Edward T. Samulski, Jukka Jokisaari, Demetri J. Photinos
Publikováno v:
Journal of Magnetic Resonance
Journal of Magnetic Resonance, Elsevier, 2015, 258, pp.17-24. ⟨10.1016/j.jmr.2015.06.005⟩
Journal of Magnetic Resonance, Elsevier, 2015, 258, pp.17-24. ⟨10.1016/j.jmr.2015.06.005⟩
International audience; The deuterium NMR spectrum of benzene-d(6) in a high field spectrometer (1 GHz protons) exhibits a magnetic field-induced deuterium quadrupolar splitting Delta v. The magnitude of Delta v observed for the central resonance is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::04059ae406953a2adc6d23508e2aac29
Publikováno v:
ChemPhysChem. 6:1483-1491
The proton NMR spectra of samples of 2-thiophenecarboxalde-hyde dissolved in a nematic liquid crystalline solvent, including those from all five singly labelled C-13 isotopomers, have been obtained. These have been analysed to yield sets of partially
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6bfc771935b99cdf20de9a5f49a12e82
https://doi.org/10.1002/cphc.200500190
https://doi.org/10.1002/cphc.200500190
Publikováno v:
The Journal of Physical Chemistry A. 109:5070-5078
C-13 and H-1 NMR spectroscopy have been used to study the orientational order which develops when a nematogenic compound, 4-pentyl-4' -cyanobiphenyl (5CB), approaches the transition from the isotropic to the nematic phase at T-NI. The experiments yie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e750c83b6abf0ee15c87bc0c327a39ca
https://doi.org/10.1021/jp050665t
https://doi.org/10.1021/jp050665t
Autor:
Giuseppina De Luca, Marcello Longeri, Giorgio Celebre, Franca Castiglione, C. Algieri, James W. Emsley
Publikováno v:
Physical Chemistry Chemical Physics. 2:3405-3413
Previous attempts to analyze the proton spectrum of ethylbenzene as a solute in nematic liquid crystalline solvents failed, but a successful strategy has now been devised and is described here. The proton spectra of samples of ethylbenzene dissolved
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d8b093ae3e5953f6af7ba52520ea1193
https://doi.org/10.1039/b002803g
https://doi.org/10.1039/b002803g
Publikováno v:
Physical Review E. 60:1831-1839
Deuterium NMR is used to monitor the magnetic field induced alignment of the directors in the smectic A phase of 4-octyl-4(')-cyanobiphenyl. The experiments consist of first preparing the sample as a monodomain by cooling slowly from the nematic phas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2d9d7a4fd99c5829a07d439ba1ead9e2
https://doi.org/10.1103/physreve.60.1831
https://doi.org/10.1103/physreve.60.1831
Publikováno v:
Journal of the Chemical Society, Perkin Transactions 2. :1211-1218
The conformational probabilities generated by rotations about the ring–oxygen bonds in 1,2-dimethoxy- (DMB) and 1,2,3-trimethoxy-benzene (TMB) are determined by comparing observed and calculated 1H–1H dipolar couplings, Dij. The Dij values are ob
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::884d94239875b65f24a0a19ca9a5e48d
https://doi.org/10.1039/a709103f
https://doi.org/10.1039/a709103f