Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Ahmed S. Ellaboudy"'
We report direct measurements of nuclear spin‐lattice relaxation times (T1n) for the sodium anion, Na−, in solutions containing both sodium and a heavier alkali metal in 1,4,7,10‐tetraoxacyclododecane (12‐crown‐4, 12C4). Nuclear spin‐latt
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6c8b04fe5031b8a6fb76494fdceb34ab
https://ora.ox.ac.uk/objects/uuid:0811dd39-4928-4701-8798-512c51b91d90
https://ora.ox.ac.uk/objects/uuid:0811dd39-4928-4701-8798-512c51b91d90
Solutions containing the sodium anion (Na-) were prepared by dissolving either NaK, NaRb or NaCs alloys in liquid 12-crown-4, 12C4. The 23Na nuclear spin-lattice (T 1n ) and spin-spin (T 2n ) relaxation times of the N.M.R. signal originating from Na-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e86d769d2d4927272c094ddb59c09427
https://doi.org/10.1080/00268979000100151
https://doi.org/10.1080/00268979000100151
The conventional chemical definition of an alkali metal in solution is based on the tacit assumption of cation formation through the spontaneous ionization of the ns1 valence electron1. However, much experimental evidence, both direct and indirect, h
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7213a9a53598b1f83e200aeffa097d8d
https://doi.org/10.1038/317242a0
https://doi.org/10.1038/317242a0
Publikováno v:
Journal of Applied Polymer Science. 60:637-647
Plasma polymerization of 4-vinyl pyridine (4-VP) proceeds through a gas-phase free radical mechanism to yield a film that retains much of the organic functionality of the monomer. During the deposition process, free radicals, which have been shown to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ae03df495f1fbac3e8e268e433e7979c
https://doi.org/10.1002/(sici)1097-4628(19960425)60:4<637::aid-app18>3.0.co
https://doi.org/10.1002/(sici)1097-4628(19960425)60:4<637::aid-app18>3.0.co
Autor:
Ahmed S. Ellaboudy, Judith L. Eglin, James L. Dye, Lauren E. H. McMills, and Songzhan Huang, Jineun Kim
Publikováno v:
The Journal of Physical Chemistry. 100:2885-2891
Alkali metal anions generally have narrow NMR lines that are only slightly shifted from those calculated for the gaseous anion. When, however, the anions form contact dimers, as in K+(cryptand[2.2.2])K- and Rb+(cryptand[2.2.2])Rb-, or chains, as in R
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::59a3013f52ac166a780711cbd991a629
https://doi.org/10.1021/jp952476o
https://doi.org/10.1021/jp952476o
Publikováno v:
Macromolecules. 29:2783-2795
Several benzoxazole and benzothiazole compounds have been prepared and their extended configurations characterized by optical absorption and emission spectroscopy. In general, solutions of these compounds fluoresce strongly and exhibit emission spect
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5e13cfaf9bea6b684b2043c8f033656f
https://doi.org/10.1021/ma951431i
https://doi.org/10.1021/ma951431i
Autor:
Charles G. Smith, Patrick B. Smith, Andrew J. Pasztor, Marianne L. McKelvy, David M. Meunier, Stephen W. Froelicher, Ahmed S. Ellaboudy
Publikováno v:
Analytical Chemistry. 65:217-243
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dec4a59615719aad7dd3fb12eb5482ad
https://doi.org/10.1021/ac00060a013
https://doi.org/10.1021/ac00060a013
Autor:
Judith L. Eglin, Peter P. Edwards, Ahmed S. Ellaboudy, Michael J. Wagner, Lauren E. H. McMills, N.C. Pyper, James L. Dye
Publikováno v:
The Journal of Physical Chemistry. 96:9656-9660
Nuclear spin-lattice relaxation times (T 1 ) of both 133 Cs and 23 Na were measured as a function of temperature for two cesium sodides, Cs + (18-crown-6) 2 Na - and Cs + (15-crown-5) 2 Na - . A logarithmic dependence of the T 1 values of these two c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8ee53b1c3b9dff29c5d8760c568a5da4
https://doi.org/10.1021/j100203a018
https://doi.org/10.1021/j100203a018
Publikováno v:
The Journal of Physical Chemistry. 95:7085-7089
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d33a1a903dc4a5daa58a086900cd1e1
https://doi.org/10.1021/j100171a068
https://doi.org/10.1021/j100171a068
Autor:
Mark E. Kuchenmeister, Ahmed S. Ellaboudy, Dae Ho Shin, Christopher J. Bender, Gerald T. Babcock, Jineun Kim, James L. Dye
Publikováno v:
Journal of the American Chemical Society. 113:2347-2352
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0a038eb8be71ae463f7bdaf5136aab8a
https://doi.org/10.1021/ja00007a001
https://doi.org/10.1021/ja00007a001