29949-80-2Relevant academic research and scientific papers
Conductance of 'bare-bones' tripodal molecular wires
Davidson, Ross J.,Milan, David C.,Al-Owaedi, Oday A.,Ismael, Ali K.,Nichols, Richard J.,Higgins, Simon J.,Lambert, Colin J.,Yufit, Dmitry S.,Beeby, Andrew
, p. 23585 - 23590 (2018)
Controlling the orientation of molecular conductors on the electrode surfaces is a critical factor in the development of single-molecule conductors. In the current study, we used the scanning tunnelling microscopy-based break junction (STM-BJ) technique t
A structural and spectroscopic study of tris-aryl substituted R 3PI2 adducts
Barnes, Nicholas A.,Godfrey, Stephen M.,Khan, Rana Z.,Pierce, Amber,Pritchard, Robin G.
experimental part, p. 31 - 46 (2012/05/20)
A series of Ar3PI2 adducts [Ar = (o-OCH 3C6H4), (m-OCH3C6H 4), (p-OCH3C6H4), (o-SCH 3C6H4), (p-SCH3C6H 4), (m-FC6H4), (p-FC6H4), (p-ClC6H4)] have been synthesized via the 1:1 reactions of Ar3P with di-iodine. The 31P{1H} NMR spectra of a series of Ar3PI2 adducts has been examined to resolve previous inconsistent reports. Ar3PI2 adducts do not ionize to [Ar3PI]I in CDCl3, and in many cases the molecular Ar3PI2 "spoke" adduct is stable in solution, with the degree of stability being highly dependent on the nature of the aryl group. The structures of the majority of these adducts have been established by X-ray diffraction studies. Whilst P-I and I-I bond lengths are primarily influenced by electronic effects, steric and crystal packing effects may also have an influence, as shown by the different polymorphs of (p-FC 6H4)3PI2, where a change in the conformation of the aryl groups in one of the molecules results in a lengthening of the P-I bond and shortening of the I-I bond.
Synthesis of triarylphosphines having para -SH and -SMe groups. Preparation of their complexes and formation of a monolayer on a gold surface
Ragaini, Fabio,Lunardi, Luca,Tomasoni, Diego,Guglielmi, Vittoria
, p. 3621 - 3630 (2007/10/03)
The phosphines P(C6H4-4-SR)3 (R = H, Me, 2-C5H9O) and (C6H4 -4-SR)2PCH2CH2P(C6 H4-4-SR)2 (R = H, Me) have been synthesized. The phosphines with -SMe groups can be prepared by reaction of 4-BrC6H4SMe with either BuLi or magnesium (to generate the corresponding Grignard compound) followed by reaction with PCl3 or Cl2PCH2 CH2PCl2, respectively. The methyl group can be eliminated by reaction with sodium in liquid NH3. Other methods of protection/deprotection of the thiol group failed to afford the desired compounds. Reaction of 4-BrC6 H4SH with dihydropyrane afforded the protected thiol 4-BrC6H4S-2-C5H9O from which the corresponding phosphine was successfully synthesized. However, attempts to remove the tetrahydropyranyl group by reaction with AgNO3-HCl, gave an insoluble polymer as product. Reaction of P(C6H4SR)3 (R = H, Me) with Ni(CO)4 affords the corresponding mono phosphine complex quantitatively. The complex with the unprotected thiol group can be absorbed on a gold surface and the corresponding νCO bands were detected by grazing angle Fourier transform infrared reflection absorption spectroscopy (grazing angle FTIR-RAS). Reaction of Rh(acac)(CO)2 with P(C6H4SR)3 (R = Me) affords the complex Rh(acac)(CO)(P(C6H4SR)3) (R = Me), but if R = H a polymer insoluble in any solvent was obtained. The same occurs in the case of PtCl2(CO)(DMSO). Apparently, once P(C6H4SH)3 is coordinated to a metal not in the zero oxidation state, oxidation of the thiol group to disulphide becomes very easy even in a dinitrogen atmosphere.
THIOPHOSPHINE COMPOUNDS AND METHOD OF MAKING POLYMERISABLE COMPOSITIONS CONTAINING THEM AND THEIR USE FOR MAKING OPHTALMIC LENSES
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Page 23, (2008/06/13)
The present invention relates in general to thiophosphine compounds (also named phosphine sulfide compounds) and their use for making polymerizable compositions which after polymerisation give optically transparent articles, such as ophthalmic lenses, hav
