Binding of a Benzoate Dye-Molecule Analogue to Rutile Titanium Dioxide Surfaces

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• 作者：David C. Grinter ; Patrick Nickels ; Thomas Woolcot ; Sulaiman N. Basahel ; Abdullah Y. Obaid ; Ahmed A. Al-Ghamdi ; El-Sayed H. El-Mossalamy ; Abdulrahman O. Alyoubi ; Geoff Thornton
• 刊名：The Journal of Physical Chemistry C
• 出版年：2012
• 出版时间：January 12, 2012
• 年：2012
• 卷：116
• 期：1
• 页码：1020-1026
• 全文大小：502K
• 年卷期：v.116,no.1(January 12, 2012)
• ISSN：1932-7455

文摘

Scanning tunneling microscopy (STM) has been used to investigate the adsorption of benzoic acid on the rutile TiO₂(110)(1 脳 1) and the reconstructed TiO₂(110)(1 脳 2) surfaces. Benzoic acid binds to both surfaces dissociatively via a bridging geometry to two Ti_5c sites. At a slightly elevated sample temperature during deposition onto the (110) (1 脳 1) surface, a well-ordered (2 脳 1) overlayer was formed at saturated benzoate coverage. On the reconstructed (110) (1 脳 2) surface, benzoate was observed to adsorb between the (1 脳 2) strands leading to a (2 脳 2) superstructure at higher coverage. Elongation along the [11虆0] direction in the STM images indicates a rotation of the benzene ring of 90掳 relative to the carboxylate group, which is reasonably explained by hydrogen bond interactions between terminating O-atoms on the surface and H-atoms of the ring.