Comparison of new periodic, mesoporous, hexylene-bridged polysilsesquioxanes with Pm3n symmetry versus sol–gel polymerized, hexylene-bridged gels

Lin, Derong; Hu, Lijiang; You, Hong; Tolbert, Stephanie H.; Loy, Douglas A.

doi:10.1016/j.jnoncrysol.2014.09.045

Cited by 15 publications

(9 citation statements)

References 25 publications

(43 reference statements)

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“…In addition, the surface of an acid‐catalyzed macroporous ethylene‐bridged polysilsesquioxane monolith shows high hydrophilicity, which is comparable with or even higher than that of a silica gel monolith . Also in the case of hexylene‐bridged precursors, periodic mesoporous hexylene‐bridged polysilsesquioxane, which should be based on the availability of abundant silanol groups for soft‐templating through hydrogen bonding with surfactant molecules, has been reported, though the abundant silanol groups are in turn disadvantageous for the elastic mechanical responses. The silylation process with HMDS on the resultant aerogels successfully reduces silanol groups and yields hydrophobic aerogels.…”

Section: Aerogels From Organobridged Alkoxysilanesmentioning

confidence: 99%

Silicone‐Based Organic–Inorganic Hybrid Aerogels and Xerogels

Shimizu

Kanamori

Nakanishi

2017

Chemistry A European J

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Aerogels are attracting increasing attention due to their high thermal insulation ability as well as unique properties such as high porosity, surface area, and transparency. However, low mechanical strengths, originating from their unique porous structure, impede handling, formability, mass production, and extended applications. This minireview focuses on the strengthening of aerogels by several organic-inorganic hybridization strategies. In particular, successful strengthening methodologies, which employ organo-substituted alkoxysilanes as the single precursor for the sol-gel preparations, developed by the authors are highlighted. Moreover, improvements in compressive strength and elasticity lead to monolithic aerogel-like xerogels through ambient pressure drying. Correlations between structures in different length scales (e.g., molecular, network, and pore structure levels) and resultant mechanical properties are discussed for further understandings and better design toward mechanically improved aerogels/xerogels and their applications.

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Section: Aerogels From Organobridged Alkoxysilanesmentioning

confidence: 99%

Silicone‐Based Organic–Inorganic Hybrid Aerogels and Xerogels

Shimizu

Kanamori

Nakanishi

2017

Chemistry A European J

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“…[34][35][36][37] A MMIP was synthesized by suspension polymerization for selective recognition of dibenzothiophene in gasoline samples. 38 MMIP beads were prepared by suspension polymerization, and were used for the adsorption of 2,4,6-trichlorophenol from an aqueous solution in a fixed-bed column. 39 Hydrophilic molecularly imprinted polymers were prepared via bulk polymerization combined with hydrolysis of ester groups for selective recognition of iridoid glycosides.…”

Section: Introductionmentioning

confidence: 99%

Preparation of magnetic molecularly imprinted polymers for the rapid detection of diethylstilbestrol in milk samples

Huang

Zhao

2019

J Sci Food Agric

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BACKGROUND: Diethylstilbestrol (DES) residues are harmful to human health because of their potential carcinogenic properties. Therefore, it is important to develop a fast and efficient pretreatment method to prevent their harmful effects on human health and the environment. RESULTS: In this paper, two types of magnetic molecularly imprinted polymers (MMIPs) of DES were prepared by bulk polymerization and the sol-gel method, respectively. The synthetic materials were characterized using Fourier transform infrared spectroscopy, scanning electron microscopy and thermogravimetric analysis. Adsorption capacities of the bulk and sol-gel MMIPs were investigated. A rapid detection method was developed using the two types of MMIPs as sorbents, coupled to high-performance liquid chromatography, for the determination of DES residues in milk samples. Under optimized conditions, the limit of detection (S/N = 3) of both methods for DES was 2.0 g L −1 ; and the linear response range to DES was 0.1-500 mg L −1 . The milk samples were analyzed according to this method with good recoveries of 88.3-97.6 and 90.5-103.5% for the two types of MMIPs, respectively. CONCLUSIONS: The method described had high sensitivity and high selectivity, and could prove to be a new method for the rapid determination of DES residues in milk samples.where C 0 (μg mL −1 ) is the initial concentration of DES in acetonitrile solution, C (μg mL −1 ) is the equilibrium concentration of DES in acetonitrile solution, V (mL) is the volume of solution and W is the mass of MMIPs/MNIPs (g).J Sci Food Agric 2019; 99: 4452-4459Adsorption kinetics experiments Figure 6 shows the adsorption isotherms of MMIPs and MNIPs for DES prepared by bulk polymerization and the sol-gel method. The adsorption capacity of bulk and sol-gel MMIPs for DES increased J Sci Food Agric 2019; 99: 4452-4459

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“… 7 – 10 Similar to mesoporous silica nanoparticles (MSN), PMOs nanoparticles, which have tunable mesopores that could be utilized for many applications are obtained by the sol–gel process from organo-bridged alkoxysilanes; 11 – 14 but unlike MSN, the diversity in chemical nature of the pore walls of such nanomaterials is theoretically unlimited. 15 Up to now, various types of PMOs-based stimuli-responsive drug delivery systems have been developed and number of capping agents, such as inorganic nanoparticles, polymers, supramolecular assembles, and biomolecules were used as smart caps on PMOs to control drug release in response to endogenous stimuli. 16 – 18 Pistone et al prepared the polymer-gated drug delivery systems for smart drug release.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of ultrasmall WS<sub>2</sub> quantum dots-coated periodic mesoporous organosilica nanoparticles for intracellular drug delivery and synergistic chemo-photothermal therapy

Liao¹,

Zhang²,

Zhong³

et al. 2018

OTT

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IntroductionThe consolidation of different therapies into a single nanoplatform has shown great promise for synergistic tumor treatment. In this study, a multifunctional platform by WS2 quantum dots (WQDs)-coated doxorubicin (DOX)-loaded periodic mesoporous organosilicas (PMOs-DOX@WQDs) nanoparticles were fabricated for the first time, and which exhibits good potential for synergistic chemo-photothermal therapy.Materials and methodsThe structure, light-mediated drug release behavior, photothermal effect, and synergistic therapeutic efficiency of PMOs-DOX@WQDs to HCT-116 colon cancer cells were investigated. The thioether-bridged PMOs exhibit a high DOX loading capacity of 66.7 μg mg−1. The gating of the PMOs not only improve the drug loading capacity but also introduce the dual-stimuli-responsive performance. Furthermore, the as-synthesized PMOs-DOX@WQDs nanoparticles can efficiently generate heat to the hyperthermia temperature with near infrared laser irradiation.ResultsIt was confirmed that PMOs-DOX@WQDs exhibit remarkable photothermal effect and light-triggered faster release of DOX. More importantly, it was reasonable to attribute the efficient anti-tumor efficiency of PMOs-DOX@WQDs.ConclusionThe in vitro experimental results confirm that the fabricated nanocarrier exhibits a significant synergistic effect, resulting in a higher efficacy to kill cancer cells. Therefore, the WQD-coated PMOs present promising applications in cancer therapy.

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Comparison of new periodic, mesoporous, hexylene-bridged polysilsesquioxanes with Pm3n symmetry versus sol–gel polymerized, hexylene-bridged gels

Cited by 15 publications

References 25 publications

Silicone‐Based Organic–Inorganic Hybrid Aerogels and Xerogels

Silicone‐Based Organic–Inorganic Hybrid Aerogels and Xerogels

Preparation of magnetic molecularly imprinted polymers for the rapid detection of diethylstilbestrol in milk samples

Fabrication of ultrasmall WS<sub>2</sub> quantum dots-coated periodic mesoporous organosilica nanoparticles for intracellular drug delivery and synergistic chemo-photothermal therapy

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