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通过拟晶转变实现分级纳米多孔有机硅/硅杂化材料的结构变化

Structural Changes of Hierarchically Nanoporous Organosilica/Silica Hybrid Materials by Pseudomorphic Transformation.

作者信息

Bilo Malina, Münzner Maximilian, Küster Christian, Enke Dirk, Lee Young Joo, Fröba Michael

机构信息

Institute of Inorganic and Applied Chemistry, University of Hamburg, Martin-Luther-King-Platz 6, 20146, Hamburg, Germany.

Institute of Chemical Technology, University of Leipzig, Linnéstraße 3, 04103, Leipzig, Germany.

出版信息

Chemistry. 2020 Sep 1;26(49):11220-11230. doi: 10.1002/chem.202000512. Epub 2020 Jun 11.

DOI:10.1002/chem.202000512
PMID:32196769
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7497150/
Abstract

Herein, it is reported how pseudomorphic transformation of divinylbenzene (DVB)-bridged organosilica@controlled pore glasses (CPG) offers the possibility to generate hierarchically porous organosilica/silica hybrid materials. CPG is utilized to provide granular shape/size and macroporosity and the macropores of the CPG is impregnated with organosilica phase, forming hybrid system. By subsequent pseudomorphic transformation, an ordered mesopore phase is generated while maintaining the granular shape and macroporosity of the CPG. Surface areas and mesopore sizes in the hierarchical structure are tunable by the choice of the surfactant and transformation time. Two-dimensional magic angle spinning (MAS) NMR spectroscopy demonstrated that micellar-templating affects both organosilica and silica phases and pseudomorphic transformation induces phase transition. A double-layer structure of separate organosilica and silica layers is established for the impregnated material, while a single monophase consisting of randomly distributed T and Q silicon species at the molecular level is identified for the pseudomorphic transformed materials.

摘要

在此，报道了二乙烯基苯（DVB）桥联有机硅@可控孔径玻璃（CPG）的拟晶转变如何为生成分级多孔有机硅/二氧化硅杂化材料提供了可能性。CPG用于提供颗粒形状/尺寸和大孔性，CPG的大孔用有机硅相浸渍，形成杂化体系。通过随后的拟晶转变，在保持CPG颗粒形状和大孔性的同时生成有序介孔相。分级结构中的表面积和介孔尺寸可通过表面活性剂的选择和转变时间进行调节。二维魔角旋转（MAS）核磁共振光谱表明，胶束模板化影响有机硅相和二氧化硅相，拟晶转变诱导相变。对于浸渍材料，建立了单独的有机硅层和二氧化硅层的双层结构，而对于拟晶转变材料，在分子水平上鉴定出由随机分布的T和Q硅物种组成的单相。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34cb/7497150/18dd5bfc55cd/CHEM-26-11220-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34cb/7497150/386976494e87/CHEM-26-11220-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34cb/7497150/0b7eddcb2e11/CHEM-26-11220-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34cb/7497150/8594d7ba7b6a/CHEM-26-11220-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34cb/7497150/0336f50b9dbc/CHEM-26-11220-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34cb/7497150/f02f29356cd2/CHEM-26-11220-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34cb/7497150/803197f03548/CHEM-26-11220-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34cb/7497150/486d0474f68c/CHEM-26-11220-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34cb/7497150/c9ecd969b21c/CHEM-26-11220-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34cb/7497150/18dd5bfc55cd/CHEM-26-11220-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34cb/7497150/386976494e87/CHEM-26-11220-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34cb/7497150/eefb5060fcc8/CHEM-26-11220-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34cb/7497150/0b7eddcb2e11/CHEM-26-11220-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34cb/7497150/8594d7ba7b6a/CHEM-26-11220-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34cb/7497150/0336f50b9dbc/CHEM-26-11220-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34cb/7497150/f02f29356cd2/CHEM-26-11220-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34cb/7497150/803197f03548/CHEM-26-11220-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34cb/7497150/486d0474f68c/CHEM-26-11220-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34cb/7497150/c9ecd969b21c/CHEM-26-11220-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/34cb/7497150/18dd5bfc55cd/CHEM-26-11220-g010.jpg

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