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Structure and glass transition of amorphous materials composed of titanium-oxo oligomers chemically modified with benzoylacetone
RSC Advances ( IF 3.9 ) Pub Date : 2020-04-21 , DOI: 10.1039/d0ra01047b Shinya Oda 1 , Shinji Kohara 2 , Ryo Tsutsui 1 , Mamoru Kasasaku 1 , Hiromitsu Kozuka 3
RSC Advances ( IF 3.9 ) Pub Date : 2020-04-21 , DOI: 10.1039/d0ra01047b Shinya Oda 1 , Shinji Kohara 2 , Ryo Tsutsui 1 , Mamoru Kasasaku 1 , Hiromitsu Kozuka 3
Affiliation
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Titanium-n-butoxide was hydrolyzed in the presence of benzoylacetone, and the resulting solution was concentrated and dried at 120 or 140 °C to obtain transparent amorphous materials. High-energy X-ray diffraction measurement was conducted at the SPring-8 facility, and the reduced pair distribution function, G(r) was calculated by Fourier transform of the total structure factor, S(Q). The G(r) value suggested that the materials are composed of TiO6 octahedra linked by corner- and edge-sharing. Low temperature thermomechanical analysis (TMA) and differential scanning calorimetry (DSC) were conduced on the materials, where a deflection was detected both in the TMA and DSC curves, revealing the glass transition of the materials. Combined with the previous work based on infrared absorption spectroscopy and gel permeation chromatography, the materials are demonstrated to be a new class of glassy materials composed of linked metal-oxygen polyhedra chelated with organic molecules. The materials are innovative due to the high refractive indices that originate in the metal-oxo oligomers and to the shapability given by their thermoplastic properties.
中文翻译：
苯甲酰丙酮化学改性钛-氧代低聚物非晶材料的结构和玻璃化转变
正丁醇钛在苯甲酰丙酮存在下水解，所得溶液在120或140℃下浓缩干燥，得到透明无定形材料。在SPring-8设备进行高能X射线衍射测量，并通过总结构因子S ( Q )的傅里叶变换计算简化对分布函数G ( r )。G ( r ) 值表明材料由TiO 6组成通过角和边共享连接的八面体。对材料进行低温热机械分析 (TMA) 和差示扫描量热法 (DSC)，在 TMA 和 DSC 曲线中均检测到变形，揭示了材料的玻璃化转变。结合前人基于红外吸收光谱和凝胶渗透色谱的工作，证明该材料是一类由连接的金属-氧多面体与有机分子螯合的新型玻璃态材料。由于源自金属-氧代低聚物的高折射率以及它们的热塑性特性赋予的可塑性，这些材料具有创新性。
更新日期：2020-04-24
中文翻译：
苯甲酰丙酮化学改性钛-氧代低聚物非晶材料的结构和玻璃化转变
正丁醇钛在苯甲酰丙酮存在下水解，所得溶液在120或140℃下浓缩干燥，得到透明无定形材料。在SPring-8设备进行高能X射线衍射测量，并通过总结构因子S ( Q )的傅里叶变换计算简化对分布函数G ( r )。G ( r ) 值表明材料由TiO 6组成通过角和边共享连接的八面体。对材料进行低温热机械分析 (TMA) 和差示扫描量热法 (DSC)，在 TMA 和 DSC 曲线中均检测到变形，揭示了材料的玻璃化转变。结合前人基于红外吸收光谱和凝胶渗透色谱的工作，证明该材料是一类由连接的金属-氧多面体与有机分子螯合的新型玻璃态材料。由于源自金属-氧代低聚物的高折射率以及它们的热塑性特性赋予的可塑性，这些材料具有创新性。
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