Výsledky vyhledávání - "Joanne R. Rollo"

An inorganic molecular glass: a glass transition for molecular tetraphosphorus triselenide

Publikováno v: Journal of Non-Crystalline Solids. 127:242-246

A differential scanning calorimetry study of the phase changes undergone by α′-P 4 Se 3 has resulted in a proposed third orientationally disordered phase, β′-P 4 Se 3 . Undercooling of this disordered β′-phase produces a molecular glass with

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::16b24715eb6dea02aa7cd5ff9c2a443c
https://doi.org/10.1016/0022-3093(91)90476-m

Zobrazit plný text záznamu

Phases of tetraphosphorus triselenide analysed by magic angle spinning 31P NMR and Raman spectroscopy, and the Raman spectrum of tetraphosphorus tetraselenide

Autor: Keith R. Morgan, Joanne R. Rollo, Gary R. Burns, Jonathan D. Sarfati

Publikováno v: Spectrochimica Acta Part A: Molecular Spectroscopy. 47:811-818

The local environments of the cage molecules in the phases of P 4 Se 3 are analysed with 31 P MAS-NMR and Raman spectroscopy. The 31 P MAS-NMR spectra of the orientationally ordered α and α′,-phases have different chemical shifts for the apical P

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4c47c7156d5f8309c1c6a0a5f1f2a676
https://doi.org/10.1016/0584-8539(91)80153-a

Zobrazit plný text záznamu

A new polymorph of tetraphosphorus triselenide, .alpha.'-P4Se3: an x-ray, Raman, and XPS study of the normal crystalline phases and a DSC study of the crystalline and the orientationally disordered phases of P4Se3

Autor: Robin J. H. Clark, Gary R. Burns, Ward T. Robinson, Michael B. Hursthouse, Helen M. Dawes, Joanne R. Rollo

Publikováno v: Inorganic Chemistry. 29:2889-2894

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a32fc47836c8793020413e3c0f22607b
https://doi.org/10.1021/ic00341a007

Zobrazit plný text záznamu

The use of Raman spectroscopy as a probe for the intermolecular bonding in crystalline tetraphosphorus trisulphide

Autor: Gary R. Burns, Joanne R. Rollo

Publikováno v: Journal of Physics and Chemistry of Solids. 48:347-354

The temperature and pressure dependences of the internal and external first-order Raman-active phonons of crystalline α-P 4 S 3 are shown to provide a sensitive probe of the intermolecular bonding. Comparison with a similar study of α-P 4 Se 3 lead

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a1524c39e50f9c0055ebe51e4ce3b965
https://doi.org/10.1016/0022-3697(87)90093-x

Zobrazit plný text záznamu

Raman spectra of single crystals of α-P4S3

Autor: Roderick W. G. Syme, Gary R. Burns, Joanne R. Rollo

Publikováno v: Journal of Raman Spectroscopy. 19:345-351

Polarization data for the Raman-active k = 0 phonons of single crystals of α-P4S3 have been measured at 10 K and at high resolution. Of the 24 external and 60 internal phonons expected for the D2h factor group of α-P4S3 we have observed 16 external

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::951a3b0dab0215e08a3ab789942b8494
https://doi.org/10.1002/jrs.1250190508

Zobrazit plný text záznamu

Raman spectra of the tetraphosphorus trichalcogenide cage molecules P4S2Se and P4SSe2

Autor: Gary R. Burns, Jonathan D. Sarfati, Joanne R. Rollo

Publikováno v: Inorganica Chimica Acta. 161:35-38

Mixtures of the four cage molecules P 4 S x Se 3− x ( x =0, 1, 2, 3) were prepared from α-P 4 S 3 and α- P 4 Se 3 . The Raman-active bands of the mixed chalcogenide molecules have been identified and used together with the results of a normal coo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0a6c840c8c806f621ff134f2ab68ebaa
https://doi.org/10.1016/s0020-1693(00)90111-7

Zobrazit plný text záznamu

Temperature dependences of the Raman spectra of the tetraphosphorus triselenodiiodides (α′-P4Se3I2 and β-P4Se3I2) and the tetraphosphorus trithiodiiodides (α-P4S3I2 and β-P4S3I2)

Autor: Gary R. Burns, Joanne R. Rollo

Publikováno v: Journal of Physics and Chemistry of Solids. 50:753-762

The Raman spectra of crystalline α′-P 4 Se 3 I 2 , β-P 4 Se 3 I 2 , α-P 4 S 3 I 2 , and β-P 4 S 3 I 2 have been measured as a function of temperature in the range 80–370 K at ambient pressure. In general, the internal and external first-order

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::df8fcfa939f0fa3addaab90b46b8e00c
https://doi.org/10.1016/0022-3697(89)90016-4

Zobrazit plný text záznamu

The temperature and pressure dependence of the Raman spectrum of crystalline tetraphosphorus decasulphide

Autor: Joanne R. Rollo, Gary R. Burns

Publikováno v: Journal of Physics and Chemistry of Solids. 50:399-405

The pressure and temperature dependences of the Raman-active phonons of the molecular crystal P4S10 were investigated. The presence of weak intra-intermolecular coupling is indicated by the softening of the 718.7 and 190.7 cm−1 bands with pressure.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::04771b798736a5c47d72fb7beef5cfe9
https://doi.org/10.1016/0022-3697(89)90440-x

Zobrazit plný text záznamu

Vyhledávací nástroje:

Upřesnit hledání