Direct inclusion of triphenylmethane and triphenylsilane into the pores of zeolite Y
Direct inclusion of triphenylmethane and triphenylsilane into the pores of zeolite Y
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将三苯基甲烷和三苯基硅烷直接包合到Y型沸石的孔道中
DOI：
10.1016/j.micromeso.2017.04.012
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发表时间：
2017
影响因子：
5.2
通讯作者：
Hiromitsu Takaba
中科院分区：
文献类型：
--
作者：
Kazu Okumura;Hiroki Takahashi;Hiromitsu Takaba
将三苯基甲烷（CHPh 3，1）和Y型沸石的混合物加热至423 K。该处理导致在沸石Y的超笼中包含高达18wt%的1（每个超笼1.2个1分子）。不仅对1，而且对1的衍生物和三苯基硅烷（7）也观察到类似的现象。1的包合在不到0.5小时内完成，而7的包合进行缓慢（约12小时），可能是由于7的体积。随着Y型分子筛中Al含量的降低，1和7的含量有增加的趋势。7-Y的傅里叶变换红外光谱显示，在Si-H伸缩区出现了三个Si-H峰，表明存在三种类型的客体分子。分子动力学计算表明，1的三个苯基分别插入到Y型分子筛的十二元环中形成包合物。隐色孔雀石绿绿色和隐色结晶紫对Knoevenagel反应的催化活性被显着增强，这些分子纳入到SC。
A mixture of triphenylmethane (CHPh3,1) and zeolite Y was heated to 423 K. The treatment resulted in the inclusion of1in the supercages of zeolite Y, up to 18 wt% (1.2 molecules of1per supercage). Similar phenomena were observed not only for1but also for the derivatives of1and for triphenylsilane (7). The inclusion of1was completed in less than 0.5 h, while the inclusion of7proceeded slowly (∼12 h), probably due to the bulk of7. The included amounts of1and7tended to increase with a decreasing concentration of Al in zeolite Y. The Fourier-transform infrared spectra of7-Y reveal the presence of three types of guest molecules, based on the appearance of three Si–H peaks in the Si–H stretching region. Calculations using molecular dynamics revealed that each of the three phenyl groups of1was inserted into the 12-membered rings of zeolite Y to form inclusion compounds. The catalytic activity of leucomalachite green and leucocrystal violet for the Knoevenagel reaction was significantly enhanced by the inclusion of these molecules into the SCs.