源自有机硅烷前体的双脲交联桥连倍半硅氧烷(BSs)C 10 C n C 10,包括癸烯链作为侧间隔基和长度可变的亚烷基链作为中心间隔基(EtO)3 Si–(CH 2)10 –Y–( CH 2)n –Y–(CH 2)10 –Si(OEt)3(n = 7,9–12; Y=脲基和Et =乙基),是通过自定向组装和酸催化的溶胶-凝胶途径(包括添加二甲基亚砜(DMSO)和大量过量的水)的组合合成的。这个新的杂化物家族使我们能够得出结论,侧基间隔物的长度在基于亚烷基的BS的结构中起着独特的作用,尽管它们的形态仍然不受影响。所有样品均采用层状结构。尽管在C 10 C 7 C 10样品中,亚烷基链完全无序,但在具有较长中心间隔基的材料中存在可变比例的全反式和gauche构象异构体。n的结构化程度最高=9。通过二维相关傅里叶变换红外光谱分析,证明了以癸烯代替丙烯链作为侧间隔基会导致形成更牢固的氢键脲-尿素阵列。C
Vapour diffusion hydrolysis of a self-assembled silylated organogel, the OG–HG transcription process: a new way to cast and handle fluorescent silsesquioxane
作者:Olivier J. Dautel、Jean-Pierre Lère-Porte、Joël J. E. Moreau、Michel Wong Chi Man
DOI:10.1039/b308703d
日期:——
A new method of hydrolysisâpolycondensation of silsesquioxanes, the OGâHG (Organo GelâHybrid Gel or Organised GelâHydrolysed Gel) process allows the transcription of the supramolecular architecture of organogels to corresponding hybrid silsesquioxanes.
作者:Amàlia Monge-Marcet、Xavier Cattoën、Philippe Dieudonné、Roser Pleixats、Michel Wong Chi Man
DOI:10.1002/asia.201300538
日期:2013.9
new mesityl‐(bis or tris)imidazolium‐based alkoxysilane precursors into their corresponding bridgedsilsesquioxanes has been investigated. These precursors feature urea groups and either short or long alkylene chains, which are known to favor self‐assembly. The most regular nanostructures were obtained by a combination of the tripodal precursors with C10H20 alkylene chains, as shown by powder X‐ray diffraction
已经研究了通过水解/缩合将四种新的基于异丁基(双或三)咪唑鎓的烷氧基硅烷前体转化为相应的桥联倍半硅氧烷的方法。这些前体具有脲基和亚烷基短链或长链,已知有利于自组装。最规则的纳米结构是通过三脚架前体与C 10 H 20亚烷基链的组合获得的,如粉末X射线衍射(PXRD)分析所示,与反应条件无关。
Nanostructuring organo-silicas: combination of intermolecular interactions and molecular recognition properties to generate self-assembled hybrids with phenylene or adenine⋯thymine bridging units
作者:Joël J. E. Moreau、Benoît P. Pichon、Guilhem Arrachart、Michel Wong Chi Man、Catherine Bied
DOI:10.1039/b419376h
日期:——
Owing to hydrophobic interactions, silyl linkers containing long alkylene chains allowed the synthesis of self-organised hybrids. Lamellar organo-silicas with phenylene or a hydrogen-bonded adenine⋯thymine complex as the bridging units are reported.
Structuring of bridged silsesquioxanes via cooperative weak interactions: H-bonding of urea groups and hydrophobic interactions of long alkylene chains
作者:Joël J. E. Moreau、Benoît P. Pichon、Catherine Bied、Michel Wong Chi Man
DOI:10.1039/b504635a
日期:——
Lamellar-bridged silsesquioxanes were obtained by the acid-catalysed hydrolytic condensation of a series of bissilylated organobridged molecular precursors. It was found that exploiting cooperative effects between the molecular interactions created by long hydrophobic hydrocarbon chains and the H-bonding between urea groups in the precursors favoured the nanostructuring of the corresponding hybrid silicas.
The Influence of Arylene and Alkylene Units on the Structuring of Urea‐Based Bridged Silsesquioxanes
作者:Benoît P. Pichon、Sylvana Scampini、Catherine Bied、Joël J. E. Moreau、Michel Wong Chi Man
DOI:10.1002/ejic.201200616
日期:2012.11
The influence of the intrinsic self-assembling properties of rigid or semirigid aromatic units as the main substructures combined with the effect of the alkylene side chains as linkers on the nanostructure of bridgedsilsesquioxanes was studied. The symmetry of the organic units was found to control the dimensionality of the hybrid nanostructure. Bis(silylated) aromatic units lead to lamellar hybrids