The effect of solvent in evaporation-induced self-assembly:A case study of benzene periodic mesoporous organosilica  

作　　者：WANG WenDong FAULKNER Daniel MOIR Jonathon OZIN Geoffrey A 

机构地区：[1]Materials Chemistry Research Group, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, M5S 3H6, Canada [2]Department of Materials Science ＆ Engineering, University of Toronto, 184 College St, Toronto, M5S 3E4, Canada

出　　处：《Science China Chemistry》2011年第12期1920-1925,共6页中国科学（化学英文版）

基　　金：the Natural Sciences and Engineering Council (NSERC) of Canada for strong and sustained support of his research

摘　　要：Volatile organic solvents were considered to have little influence on the synthesis of mesostructured materials through evaporation-induced self-assembly(EISA),because upon evaporation they leave the sol and hence do not interfere with the self-assembly process.We show here that the choice of solvent is crucial in the synthesis of thin films of phenylene-bridged periodic mesoporous organosilica(benzene PMO).Methanol is found to be a better solvent for the synthesis of thin films,whereas ethanol favors the formation of(HO)3Si-C6H4-Si(OH)3 crystals,the identity and structure of which is established by X-ray diffraction.A ternary reactant composition diagram is designed to visualize the relationship among multiple synthesis experiments and to guide the interpretation of experimental results and optimization of the quality of the periodic mesoporous organosilica film.Our study highlights the importance of solvent choice,a factor often neglected in EISA.We expect it to inspire researchers to explore the effect of solvent in designing the synthesis of mesoporous materials.Volatile organic solvents were considered to have little influence on the synthesis of mesostructured materials through evaporation-induced self-assembly （EISA）, because upon evaporation they leave the sol and hence do not interfere with the self-assembly process. We show here that the choice of solvent is crucial in the synthesis of thin films of phenylene-bridged periodic mesoporous organosilica （benzene PMO）. Methanol is found to be a better solvent for the synthesis of thin films, whereas ethanol favors the formation of （HO）3Si-C6H4-Si（OH）3 crystals, the identity and structure of which is established by X-ray diffraction. A ternary reactant composition diagram is designed to visualize the relationship among multiple synthesis experiments and to guide the interpretation of experimental results and optimization of the quality of the periodic mesoporous organosilica film. Our study highlights the importance of solvent choice, a factor often neglected in EISA. We expect it to inspire researchers to explore the effect of solvent in designing the synthesis of mesoporous materials.

关 键 词：mesoporous materials periodic mesoporous organosilica evaporation induced self assembly thin films 

分 类 号：O174[理学—数学] TQ028.8[理学—基础数学]