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Citation: Li Hai-Ying, Zhang Hao-Li, Zhang Jin, Liu Zhong-Fan. Preparation and Structural Characterization of Self-assembled Monolayers from a New Series of Mercapto Contained Azobenzene Derivatives[J]. Acta Physico-Chimica Sinica, ;1999, 15(03): 198-203. doi: 10.3866/PKU.WHXB19990302 shu

Preparation and Structural Characterization of Self-assembled Monolayers from a New Series of Mercapto Contained Azobenzene Derivatives

1.
Center for Intelligent Material Research(CIMR),College of Chemistry and Molecular Engineering,Peking University,Beijing 100871;Petrochemical Department,Fushu Petroleum Institute,Fushun 113001

Received Date: 9 November 1998
Available Online: 15 March 1999

Self Assembled Monolayers(SAMs) of a series of mercapto contained azobenzene derivatives with the structure of CnH2n+1AzoO(CH 2)mSH (where n =4,6,8,10,12; with m =3,5 respectively) were prepared and characterized. Wettability measurement of water on the SAMs demonstrates that molecular packing density in the monolayers increases while the alkyl chain in the molecules is lengthened. Both the n and m values have similar contribution to the wetting property of SAMs. The RA IR spectra reveal that the alkyl chains in the SAMs tilt away dramatically from the surface normal direction with the increase in their length. However, the orientation of azobenzene moiety is found to be influenced slightly by the alkyl chain length, which is due to the tenderness of the molecule.
- Self-assembled monolayers(SAMs),
- Azobenzene derivatives,
- Contact angle measure
  ,
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