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Optical Properties of Immobilized Colloidal Crystals of Polymer-modified Silica Containing Chromophore group and Their Application

含发色团聚合物改性二氧化硅固定化胶体晶体的光学性质及其应用

基本信息

批准号：
18350120
负责人：
YOSHINAGA Kohji
金额：
$ 10.05万
依托单位：
Kyushu Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

项目摘要

1. Grafting of polymer containing chromophore group onto colloidal silica and colloidal crystallization in organic solventCopolymer silanes with chromophore were synthesized by radical copolymerization of vinyl monomer and acrylate or methacrylate having ferroceny or diene-Fe (0) tricarboby group. Grafting of copolymer onto colloidal silica of 130 nm in diameter was carried out by the reaction of the copolymer silane with hydroxyl group on silica. It was observed that colloidal crystallization of copolymer-grafted silica occurred in polar solvent, such as N,N-dimethylformamide, ethanol or acetone. Colloidal silica modified with copolymer containing Ru (II) -trisbipylidyl complex moiety, having absorption bands in the region at 500〜600 nm, also formed colloidal crystals in organic solvent. This approach has been received much attention for increasing intrinsic refractive index or dielectric constant of colloidal silica.2. Estimation of single crystal size and inter-sphere distance in im … More mobilized colloidal crystalsChanges of single crystal size and inter-sphere distance during immobilization of colloidal crystals, formed by polymer-modified silica in organic solvent, were investigated and relation between the changes and volume fraction of the particles was clarified.3. Increasing colloidal crystal size in organic solventHigh molecular weight polymer-grafted silica, synthesized by an atom transfer radical polymerization, gave colloidal crystals stemming from steric interaction of grafting polymer chains in organic solvent. However, It was impossible to immobilize by a stepwise polymerization.4. Optical properties of colloidal crystals of polymer-grafted silica containing transition-metal complex moietyColloidal crystals of transition metal complex-tethered polymer-modified silica formed in organic solvent gave out specific coloration depending on composition of copolymer and on solvent. The coloration was ascribed to balances between absorbance bands of the complex moiety in the range from 400〜500 nm and transmission of visible light from 700〜800 nm through colloidal crystals in organic solvent. Less

1.含生色基团的聚合物在硅胶上的接枝及其在有机溶剂中的胶体结晶通过乙烯基单体与含二茂铁基或二烯-铁(0)三碳基团的丙烯酸酯或甲基丙烯酸酯进行自由基共聚合，合成了含发色团的共聚硅烷。通过共聚硅烷与二氧化硅表面的羟基反应，将共聚硅烷接枝到直径为130 nm的胶体二氧化硅上。观察到接枝共聚物的二氧化硅在N，N-二甲基甲酰胺、乙醇或丙酮等极性溶剂中发生胶体结晶。含有Ru(II)-三联吡啶络合物的共聚物修饰的胶体二氧化硅在500~600 nm处有吸收带，在有机溶剂中也形成了胶体晶体。这种方法由于提高了胶体二氧化硅的本征折射率或介电常数而备受关注。IM-…中单晶尺寸和球距的估算考察了聚合物改性二氧化硅在有机溶剂中形成的胶体晶体在固定化过程中单晶尺寸和球距的变化，明确了胶体晶体的尺寸变化与颗粒体积分数之间的关系。有机溶剂中胶体晶体尺寸的增大通过原子转移自由基聚合法合成了高相对分子质量的聚合物接枝二氧化硅，得到的胶体晶体源于有机溶剂中接枝聚合物链的空间相互作用。但是，采用分步聚合的方法不可能实现固定化。含过渡金属络合物的聚合物接枝二氧化硅胶体晶体的光学性质在有机溶剂中形成的过渡金属络合聚合物改性二氧化硅胶体晶体呈现出特定的颜色，这取决于共聚物的组成和溶剂。这种显色是由于有机溶剂中络合物在400~500 nm范围内的吸收带与700~800 nm范围内的可见光透过胶体晶体之间的平衡所致。较少