Luminescence of a Ruthenium Complex Monolayer, Covalently Assembled on Silica Substrates, upon CO Exposure

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• 作者：Fabio Lupo ; Maria E. Fragal ; Tarkeshwar Gupta ; Antonino Mamo ; Alessandro Aureliano ; Marco Bettinelli ; Adolfo Speghini ; Antonino Gulino
• 刊名：Journal of Physical Chemistry C
• 出版年：2010
• 出版时间：August 19, 2010
• 年：2010
• 卷：114
• 期：32
• 页码：13459-13464
• 全文大小：202K
• 年卷期：v.114,no.32(August 19, 2010)
• ISSN：1932-7455

文摘

High quality silica and Si(100) substrates were functionalized with a covalent 4-ClCH₂C₆H₄SiCl₃ monolayer. Additional covalent bonding of an OH-phenol functionalized asymmetric ruthenium complex [Ru(bpy)₂L](PF₆)₂ to the silylated substrates was further achieved, thus fabricating a new monolayer of ruthenium complex molecules on both silica and Si substrates. The chemical and spectroscopic characterization was carried out by X-ray photoelectron and UV−visible spectroscopy measurements. The optical properties of this robust monolayer were studied at room temperature by luminescence measurements in controlled atmosphere. Results grant the system recognition properties for CO at ppm levels. The adopted synthetic procedure has proven to be effective in transferring molecular properties to the solid state thus obtaining a photoluminescent device.