Mesoporous Silica Layer: Preparation and Opportunity

Ogawa, Makoto

doi:10.1002/tcr.201600068

Cited by 31 publications

(18 citation statements)

References 260 publications

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“…Although, these high silica zeolites synthesized by using different quaternary ammonium halide/hydroxide as templates found huge applications industrially as solid acid catalysts, their sub‐nanometer size pore window was the major obstacle that these catalysts face, while catalyzing reactions of bulky organic substrates . This is largely overcome by the discovery of ordered mesoporous silicas and folded sheet materials FSM‐16, which are synthesized in the presence of the supramolecular assembly of cationic surfactants as structure directing agents. Several key synthetic routes for designing ordered and disordered mesoporous materials are illustrated in the next few sections.…”

Section: Resultsmentioning

confidence: 99%

Materials with Nanoscale Porosity: Energy and Environmental Applications

Bhanja

Bhaumik

2018

The Chemical Record

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In this personal account, several key inventions on designing novel microporous and mesoporous materials, and their applications in energy and environmental research are reviewed. Although, crystalline materials with sub-nanometer pore size regime like zeolites, AlPOs, MOFs, ZIFs etc. are known over the years, silicious and non-silicious mesoporous materials have revolutionized the research on the materials with nanoscale porosity in last two and half decades. A wide range of inorganic, organic-inorganic hybrid as well as purely organic mesoporous materials with either periodic or disordered mesopores are known. Apart from conventional hydrothermal syntheses involving soft templating route, hard templating, evaporation induced self-assembly (EISA), electrochemical or solvothermal (using hydrophilic solvents) synthetic routes are often employed in designing a large spectrum of mesoporous materials. Ease of synthesis using available cheap raw chemicals and versatility in the framework compositions together with the unique surface properties like exceptionally high surface area, pore volume and tunability in pore dimensions have made these materials very exciting to a wide range of researchers working on materials chemistry. Nanoscale porosity in the semiconductor nanomaterials is highly beneficial for the photocatalytic, optoelectronic and related light-harvesting applications. Their high chemical stability has been explored intensively in designing novel heterogeneous catalysts for the synthesis of biofuels from biomass or CO fixation to reactive organic molecules for the synthesis of fine chemicals and fuels, which has a large impact on energy and environmental research for the years to come. Diversity in mesoporous frameworks and their potential applications related to light harvesting, generation of renewable energy and synthesis of value added fine chemicals and fuels through environment friendly routes are mostly focused in this review.

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Section: Resultsmentioning

confidence: 99%

Materials with Nanoscale Porosity: Energy and Environmental Applications

Bhanja

Bhaumik

2018

The Chemical Record

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“…56 Accordingly, it is worth investigating to examine the molecular migration in various media with designed connection. The possibility of fabrication of mesoporous silicas 57 and organophilic clays 58 into films will be utilized to control the backward reaction further and to design photochromic devices. Isomerization of SP in the Organophilic Clays.…”

Section: Preparation Of Hybrids Of the Organophilic Clays And Mpss(mc...mentioning

confidence: 99%

Efficient Negative Photochromism by the Photoinduced Migration of Photochromic Merocyanine/Spiropyran in the Solid State

2021

Self Cite

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Efficient negative photochromism was achieved by the photoinduced migration of merocyanine in mesoporous silica to an organophilic clay as spiropyran. Depending on the nature of the organophilic clays (dioctadecyldimethylammonium and dioleyldimethylammonium clays), important differences in the negative photochromisms and the thermal coloration were observed; the dioleyldimethylammonium clay gave a higher yield (98%) and faster reaction (half-life t 1/2 = 2.8 h) than the dioctadecyldimethylammonium clay (94% and t 1/2 = 3.2 h) of the negative photochromism, indicating the important role of the surfactant assembly to control the molecular diffusion.

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“…The porous structure of MSPs provides a large surface area, allowing for the incorporation of large amounts of drugs within a small carrier and binding to different molecules 59 . Empty MSPs in an extracellular environment are likely to operate in a similar manner and incorporate molecules, which can pass through the silica pores or bind to the silica in a concentration dependent manner.…”

Section: Vol:(0123456789)mentioning

confidence: 99%

Empty mesoporous silica particles significantly delay disease progression and extend survival in a mouse model of ALS

Leyton-Jaimes

Ivert

Hoeber

et al. 2020

Sci Rep

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Amyotrophic lateral sclerosis (ALS) is a devastating incurable neurological disorder characterized by motor neuron (MN) death and muscle dysfunction leading to mean survival time after diagnosis of only 2–5 years. A potential ALS treatment is to delay the loss of MNs and disease progression by the delivery of trophic factors. Previously, we demonstrated that implanted mesoporous silica nanoparticles (MSPs) loaded with trophic factor peptide mimetics support survival and induce differentiation of co-implanted embryonic stem cell (ESC)-derived MNs. Here, we investigate whether MSP loaded with peptide mimetics of ciliary neurotrophic factor (Cintrofin), glial-derived neurotrophic factor (Gliafin), and vascular endothelial growth factor (Vefin1) injected into the cervical spinal cord of mutant SOD1 mice affect disease progression and extend survival. We also transplanted boundary cap neural crest stem cells (bNCSCs) which have been shown previously to have a positive effect on MN survival in vitro and in vivo. We show that mimetic-loaded MSPs and bNCSCs significantly delay disease progression and increase survival of mutant SOD1 mice, and also that empty particles significantly improve the condition of ALS mice. Our results suggest that intraspinal delivery of MSPs is a potential therapeutic approach for the treatment of ALS.

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Mesoporous Silica Layer: Preparation and Opportunity

Cited by 31 publications

References 260 publications

Materials with Nanoscale Porosity: Energy and Environmental Applications

Materials with Nanoscale Porosity: Energy and Environmental Applications

Efficient Negative Photochromism by the Photoinduced Migration of Photochromic Merocyanine/Spiropyran in the Solid State

Empty mesoporous silica particles significantly delay disease progression and extend survival in a mouse model of ALS

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