Loops versus Stems: Benzylic Sulfide Oligomers Forming Carpet Type Monolayers
Chainlike oligomers consisting of several meta position interlinked benzylic sulfides and terminal benzylic thiols were synthesized, and the nature of the molecular monolayers formed by their self-assembly on gold (111) substrates was investigated. The fabricated films were characterized by high-res...
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Veröffentlicht in: | Journal of physical chemistry. C 2010-03, Vol.114 (9), p.4118-4125 |
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container_title | Journal of physical chemistry. C |
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creator | Sander, Fabian Peterle, Torsten Ballav, Nirmalya Wrochem, Florian von Zharnikov, Michael Mayor, Marcel |
description | Chainlike oligomers consisting of several meta position interlinked benzylic sulfides and terminal benzylic thiols were synthesized, and the nature of the molecular monolayers formed by their self-assembly on gold (111) substrates was investigated. The fabricated films were characterized by high-resolution X-ray photoelectron spectroscopy and near-edge X-ray absorption fine structure spectroscopy. In the case of the short oligomers, the spectroscopic studies were additionally supported by scanning tunneling microscopy experiments. The target molecules were found to form dense and contamination-free self-assembled monolayer (SAM)-like “carpet” films on gold (111). In spite of the multidentate nature of the benzylic sulfide oligomers, the predominant molecular conformation in these films were bridges (“loops”) formed by the covalent attachment of both terminal thiols with a minor amount of molecules which were bound by only one thiol group as upright standing “stems” protruding the SAM. The films exhibited only a limited degree of order with slight preference of a perpendicular-to-the-surface orientation of the individual phenyl rings of the oligomer chains. |
doi_str_mv | 10.1021/jp911879x |
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The fabricated films were characterized by high-resolution X-ray photoelectron spectroscopy and near-edge X-ray absorption fine structure spectroscopy. In the case of the short oligomers, the spectroscopic studies were additionally supported by scanning tunneling microscopy experiments. The target molecules were found to form dense and contamination-free self-assembled monolayer (SAM)-like “carpet” films on gold (111). In spite of the multidentate nature of the benzylic sulfide oligomers, the predominant molecular conformation in these films were bridges (“loops”) formed by the covalent attachment of both terminal thiols with a minor amount of molecules which were bound by only one thiol group as upright standing “stems” protruding the SAM. The films exhibited only a limited degree of order with slight preference of a perpendicular-to-the-surface orientation of the individual phenyl rings of the oligomer chains.</description><identifier>ISSN: 1932-7447</identifier><identifier>EISSN: 1932-7455</identifier><identifier>DOI: 10.1021/jp911879x</identifier><language>eng</language><publisher>American Chemical Society</publisher><subject>C: Surfaces, Interfaces, Catalysis</subject><ispartof>Journal of physical chemistry. 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In spite of the multidentate nature of the benzylic sulfide oligomers, the predominant molecular conformation in these films were bridges (“loops”) formed by the covalent attachment of both terminal thiols with a minor amount of molecules which were bound by only one thiol group as upright standing “stems” protruding the SAM. 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C</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Sander, Fabian</au><au>Peterle, Torsten</au><au>Ballav, Nirmalya</au><au>Wrochem, Florian von</au><au>Zharnikov, Michael</au><au>Mayor, Marcel</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Loops versus Stems: Benzylic Sulfide Oligomers Forming Carpet Type Monolayers</atitle><jtitle>Journal of physical chemistry. C</jtitle><addtitle>J. Phys. Chem. C</addtitle><date>2010-03-11</date><risdate>2010</risdate><volume>114</volume><issue>9</issue><spage>4118</spage><epage>4125</epage><pages>4118-4125</pages><issn>1932-7447</issn><eissn>1932-7455</eissn><abstract>Chainlike oligomers consisting of several meta position interlinked benzylic sulfides and terminal benzylic thiols were synthesized, and the nature of the molecular monolayers formed by their self-assembly on gold (111) substrates was investigated. The fabricated films were characterized by high-resolution X-ray photoelectron spectroscopy and near-edge X-ray absorption fine structure spectroscopy. In the case of the short oligomers, the spectroscopic studies were additionally supported by scanning tunneling microscopy experiments. The target molecules were found to form dense and contamination-free self-assembled monolayer (SAM)-like “carpet” films on gold (111). In spite of the multidentate nature of the benzylic sulfide oligomers, the predominant molecular conformation in these films were bridges (“loops”) formed by the covalent attachment of both terminal thiols with a minor amount of molecules which were bound by only one thiol group as upright standing “stems” protruding the SAM. 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title | Loops versus Stems: Benzylic Sulfide Oligomers Forming Carpet Type Monolayers |
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