Can an intact and crystalline octakis(methacryloxypropyl) silsesquioxane be prepared by hydrolysis-condensation of a trimethoxysilane precursor?

Peng, Jun; Xu, Kai; Cai, Hualun; Wu, Jiang-Bin; Lin, Weihong; Yu, Zhiwei; Chen, Mingcai

doi:10.1039/c3ra46981f

Cited by 26 publications

(27 citation statements)

References 32 publications

(40 reference statements)

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“…Recently, we reported that the physical state of each silsesquioxane cage was determined by the degree of symmetry at the molecular level. 24 For example, the highly symmetrical T 8 cage (O h ) is crystalline, [18][19][20]22,24,25 while the less symmetrical T 10 (D 5h ) and T 12 (D 2d ) cages tend to have a loosely packed structure. 18,22 Regarding preliminary observations, compound 2 (T 8 ) is a white powder solid with a melting point (m.p.)…”

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confidence: 99%

Synthesis of aromatic functionalized cage-rearranged silsesquioxanes (T₈, T₁₀, and T₁₂) via nucleophilic substitution reactions

et al. 2015

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Organic-inorganic hybrid nano-building blocks of aromatic nitro-, aldehyde-, and bromo-functionalized polyhedral oligomeric silsesquioxanes were easily prepared through nucleophilic substitutions, starting from the reactions between octakis(3-chloropropyl)octasilsesquioxane and phenoxide derivatives. These phenoxide anions not only supply the substitution functions to a silsesquioxane cage, but can also induce a cage-rearrangement leading to the formation of octa-, deca-, and dodecahedral silsesquioxane cages.

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confidence: 99%

Synthesis of aromatic functionalized cage-rearranged silsesquioxanes (T₈, T₁₀, and T₁₂) via nucleophilic substitution reactions

et al. 2015

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“…Uniform surface functionalization of the hollow nanospheres can provide selective loading, carrying, and adsorption properties. In our previous work, some of the silsesquioxane double bonds did not participate in thermal polymerization, and some double bonds were embedded in the polymer . The PS/CMSQ nanospheres were characterized by differential scanning calorimetry (DSC) during this work.…”

Section: Resultsmentioning

confidence: 99%

Polymerizable Molecular Silsesquioxane Cage Armored Hybrid Microcapsules with In Situ Shell Functionalization

Xing

Peng

et al. 2016

Chemistry A European J

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We prepared core-shell polymer-silsesquioxane hybrid microcapsules from cage-like methacryloxypropyl silsesquioxanes (CMSQs) and styrene (St). The presence of CMSQ can moderately reduce the interfacial tension between St and water and help to emulsify the monomer prior to polymerization. Dynamic light scattering (DLS) and TEM analysis demonstrated that uniform core-shell latex particles were achieved. The polymer latex particles were subsequently transformed into well-defined hollow nanospheres by removing the polystyrene (PS) core with 1:1 ethanol/cyclohexane. High-resolution TEM and nitrogen adsorption-desorption analysis showed that the final nanospheres possessed hollow cavities and had porous shells; the pore size was approximately 2-3 nm. The nanospheres exhibited large surface areas (up to 486 m g ) and preferential adsorption, and they demonstrated the highest reported methylene blue adsorption capacity (95.1 mg g ). Moreover, the uniform distribution of the methacryloyl moiety on the hollow nanospheres endowed them with more potential properties. These results could provide a new benchmark for preparing hollow microspheres by a facile one-step template-free method for various applications.

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“…Hence, the formulation of a top layer in the 1 : 100 mass ratio kept constant, different compositions were formulated by mixing CMSQ-T 10 with OAPS in a molar ratio of 1 : 1, 1 : 4 and 1 : 8 as the bulk layer. 11, double-layer DLS-8, DLS-4 and DLS-1 showed a minimum reflectance over the entire visible range of 3.51 AE 0.03% (3.26 AE 0.04%), 4.52 AE 0.02% (3.92 AE 0.03%) and 4.95 AE 0.03% (4.25 AE 0.03%) as compared to 8.02 AE 0.03% (7.55 AE 0.04%) in the case of plane quartz, respectively, when the light incidence angle is 301 (51). As depicted in Fig.…”

Section: Design Of the Formulation To Control The Morphology Of The Rmentioning

confidence: 95%

“…51 Octakis(aminophenyl) silsesquioxane (OAPS) was prepared by following the methods described in the published literature. The used octakis-(methacryloxypropyl) silsesquioxane and T 10 analogues were prepared as described in our previous work.…”

Section: Methodsmentioning

confidence: 99%

Fabrication of silsesquioxane-based nano-wrinkled structures by coupling the polymeric surface onto rigid templates assembled from unique deca-silsesquioxane

Peng

Xing

et al. 2015

J. Mater. Chem. C

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In this work, a facile strategy to fabricate double-layer nano-wrinkled structures by coupling the polymeric surface onto silsesquioxane rigid templates has been proposed. Aza-Michael addition was applied to construct the bulk layer by using octakis(aminophenyl) silsesquioxane (OAPS) and decakis(methacryloxypropyl) silsesquioxane (CMSQ-T 10 ). Subsequently, a top layer was fabricated through free-radical polymerization of octakis(methacryloxypropyl) silsesquioxane (CMSQ-T 8 ) and hexafluorobutyl acrylate (HFBA). For the first time, well defined nanoisland structures were achieved via reaction-induced assembly of two kinds of silsesquioxane cages in the rigid layer, which could further serve as an in situ template or a scaffold for top polymerization. As a result, the template role of the bulk layer and compressive stress caused by mismatch of different volumetric shrinkages of reactions between top and bulk layers led to the double-layer nano-wrinkled structures, which could be observed using a Field Emission Scanning Electron Microscope (FE-SEM) and an Atomic Force Microscope (AFM). Moreover, by tuning bilayer formulations, controllable nano-wrinkled structures can be obtained. The minimum reflectance of resulting nano-wrinkled surface is decreased to 3.51 AE 0.03% (maximum transmittance 98.51 AE 0.02%).Furthermore, the resulting surface shows obvious hydrophobicity and superior thermal stability, thus suggesting its potential use as antireflective surfaces in optical devices, solar cells and various optoelectronic devices.

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Can an intact and crystalline octakis(methacryloxypropyl) silsesquioxane be prepared by hydrolysis-condensation of a trimethoxysilane precursor?

Cited by 26 publications

References 32 publications

Synthesis of aromatic functionalized cage-rearranged silsesquioxanes (T₈, T₁₀, and T₁₂) via nucleophilic substitution reactions

Synthesis of aromatic functionalized cage-rearranged silsesquioxanes (T₈, T₁₀, and T₁₂) via nucleophilic substitution reactions

Polymerizable Molecular Silsesquioxane Cage Armored Hybrid Microcapsules with In Situ Shell Functionalization

Fabrication of silsesquioxane-based nano-wrinkled structures by coupling the polymeric surface onto rigid templates assembled from unique deca-silsesquioxane

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Can an intact and crystalline octakis(methacryloxypropyl) silsesquioxane be prepared by hydrolysis-condensation of a trimethoxysilane precursor?

Cited by 26 publications

References 32 publications

Synthesis of aromatic functionalized cage-rearranged silsesquioxanes (T8, T10, and T12) via nucleophilic substitution reactions

Synthesis of aromatic functionalized cage-rearranged silsesquioxanes (T8, T10, and T12) via nucleophilic substitution reactions

Polymerizable Molecular Silsesquioxane Cage Armored Hybrid Microcapsules with In Situ Shell Functionalization

Fabrication of silsesquioxane-based nano-wrinkled structures by coupling the polymeric surface onto rigid templates assembled from unique deca-silsesquioxane

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Synthesis of aromatic functionalized cage-rearranged silsesquioxanes (T₈, T₁₀, and T₁₂) via nucleophilic substitution reactions

Synthesis of aromatic functionalized cage-rearranged silsesquioxanes (T₈, T₁₀, and T₁₂) via nucleophilic substitution reactions