Synthesis and catalytic behavior of tetrakis(4-carboxyphenyl) porphyrin-periodic mesoporous organosilica
Synthesis and catalytic behavior of tetrakis(4-carboxyphenyl) porphyrin-periodic mesoporous organosilica
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DOI：
10.1039/c0jm02591g
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发表时间：
2010-01-01
影响因子：
--
通讯作者：
Park, Sang-Eon
中科院分区：
文献类型：
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作者：
Jeong, Eun-Young;Burri, Abhishek;Park, Sang-Eon
采用微波直接共缩合法与相应的四硅烷成功合成了具有四(4-羧基苯基)卟啉(TCPP)单元的周期性介孔有机二氧化硅。四硅烷前体 TCPP-倍半硅氧烷是通过 TCPP 与 APTES（3-氨基丙基三乙氧基硅烷）反应制备的。以偏硅酸钠为二氧化硅源，P123（EO20PO70EO20）为超分子模板，在100℃下合成了TCPP-PMOs。TCPP-PMO-n（n=2.5和5.0，n指TCPP前体与二氧化硅的摩尔百分比）材料具有>400 m(2) g(-1)的比表面积，孔径约为8.7 nm。 TCPP-PMOs 在苯乙酮、环己酮和频哪酮等各种酮的有机催化氢转移反应中表现出优越性，并且在不掺入金属的情况下在亚甲基蓝（MB）的光催化降解中具有良好的活性。通过离子交换法制备的Fe-TCPP-PMO在环己烯的氧化中也表现出良好的活性和选择性。
The periodic mesoporous organosilica having the tetrakis(4-carboxyphenyl) porphyrin (TCPP) unit was successfully synthesized by the direct co-condensation method using microwave with the corresponding tetra-silane. The tetra-silane precursor, TCPP-silsesquioxane was prepared through the reaction of TCPP with the APTES(3-Aminopropyltrietoxysilane). And TCPP-PMOs were synthesized with sodium metasilicate as a silica source and P123 (EO20PO70EO20) as a supramolecular template at 100 degrees C. The TCPP-PMO-n (n = 2.5 and 5.0, n refers to the molar percentage of TCPP precursor per silica) materials had >400 m(2) g(-1) of specific surface areas with similar to 8.7 nm of pore diameter. TCPP-PMOs were illustrated to give superiority in the organocatalytic hydrogen transfer reactions of various ketones such as acetophenone, cyclohexanone and pinacolone as well as good activity in the photocatalytic degradation of methylene blue (MB) without metal incorporation. Fe-TCPP-PMO prepared by ion-exchange method gave also good activity and selectivity in the oxidation of cyclohexene.