Synthesis of a New Photochromic ZrO₂ Precursor for Preparation of Functional Thin Films

Abstract:

A new photochromic ZrO2 precursor solution was prepared using zirconium tetra-n-butoxide, 4-(phenylazo)benzoic acid and ethyleneglycol monomethylether. The ZrO2 precursor solution was irradiated with ultraviolet light (UV) at room temperature. After that, UV-irradiated precursor solution was irradiated with visible light (Vis) at room temperature. UV-Vis spectra were measured before irradiation, after UV irradiation and Vis irradiation. Changes of UV-Vis spectra indicated that the new ZrO2 precursor including 4-(phenylazo)benzoic acid shows photochromism. The phenomena have synchronized with reversible photoisomerization of 4-(phenylazo)benzoic acid in the precursor. In addition, the difference of peak position originated from Zr-O CT transition between before UV irradiation and after UV irradiation increased with increasing the concentration of 4-(phenylazo)benzoic acid. Furthermore, the optimized structure of the new ZrO2 precursor was derived by density functional theory (DFT) calculation.

• Periodical: Key Engineering Materials (Volume 320)
• Pages: 175-178
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.320.175
• Online since: September 2006
• Authors: Kaori Nishizawa, Haruhiko Fukaya, Takeshi Miki, Kazuyuki Suzuki, Kazumi Kato
• Keywords: Azobenzene Derivatives, DFT Calculation, Photochromism, Precursor, Zro₂

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[9] K. Nishizawa, T. Miki, K. Suzuki, K. Kato, Ceramic Transactions, in press. � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � E-mail: k-nishizawa@aist. go. jp, Fax: [phone].