TY - JOUR T1 - Carborane-thiol-silver interactions. A comparative study of the molecular protection of silver surfaces JF - Surface and Coatings Technology Y1 - 2010 A1 - Tomas Base A1 - Zdenek Bastl A1 - Vladimir Havranek A1 - Kamil Lang A1 - Jonathan Bould A1 - Michael G S Londesborough A1 - Jan Machacek A1 - Jaromir Plesek AB -

The interaction between flat silver surfaces and carboranethiol derivatives, and its relevance regarding the molecular protection of silver against corrosion by hydrogen sulphide, are reported here. A comparison of the protective qualities of four carboranethiols (1-HS-1,2-C2B10H11, 1,2-(HS)2-1,2-C2B10H10, 9,12-(HS)2-1,2-C2B10H10, and 1,12-(HS)2-1,2-C2B10H10) with several organic thiols (1-butanethiol, 1-octanethiol, 1-dodecanethiol, benzene-1,2-dithiol, benzenethiol, and sodium 2-mercaptoethanesulphonate) is provided. All these derivatives are categorized according to their capacity to inhibit the interaction of silver with H2S in the presence of water molecules in the gas phase. We found that significantly better molecular protection for silver surfaces is afforded by the carboranethiol derivatives, and, of these, 9,12-(HS)2-1,2-C2B10H10 proved to be particularly effective. The corrosion of silver by H2S is accompanied by well-defined colour changes from lustrous silver, through yellow, violet, blue, and finally to grey. This sequence has not been reported before and it is used in this study as a qualitative indicator of the extent of silver corrosion. Our results are supported by reflectance UV

VL - 204 UR - http://www.sciencedirect.com/science/article/pii/S0257897210001106 ER - TY - Generic T1 - Carborane Thiol-modified Gold Surfaces. A Study and Comparison of Modified Cluster and Flat Surfaces T2 - 12th International Meeting on Boron Chemistry (IMEBORON-XII) Y1 - 2005 A1 - Tomas Base A1 - Zdenek Bastl A1 - Zbynek Plzak A1 - Tomas Grygar A1 - Jaromir Plesek A1 - Michael J Carr JF - 12th International Meeting on Boron Chemistry (IMEBORON-XII) CY - Sendai, Japan, 11 ER - TY - JOUR T1 - Carboranethiol-Modified Gold Surfaces. A Study and Comparison of Modified Cluster and Flat Surfaces JF - Langmuir Y1 - 2005 A1 - Tomas Base A1 - Zdenek Bastl A1 - Zbynek Plzak A1 - Tomas Grygar A1 - Jaromir Plesek A1 - Michael J Carr A1 - Vaclav Malina A1 - Jan Subrt A1 - Jaroslav Bohacek A1 - Eva Vecernikova A1 - Otomar Kriz AB -

Four different carboranethiol derivatives were used to modify the surfaces of gold nanoparticles and flat gold films. The novel materials engendered from these modifications are extraordinarily stable species with surfaces that support self-assembled monolayers of 1-(HS)-1,2-C2B10H11, 1,2-(HS)2-1,2-C2B10H10, 1,12-(HS)2-1,12-C2B10H10, and 9,12-(HS)2-1,2-C2B10H10, respectively. Surprisingly, characterization of these materials revealed that a number of molecules of the carboranethiol derivatives are incorporated inside the nanoparticles. This structural feature was studied using a number of techniques, including X-ray photoelectron spectroscopy (XPS), UV VL - 21 UR - http://pubs.acs.org/doi/abs/10.1021/la051122d IS - 17 ER -