Yttrium tris(trimethylsilylmethyl) complexes grafted onto MCM-48 mesoporous silica nanoparticles

2022 ◽  
Author(s):  
Alexandros Mortis ◽  
Caecilia Maichle-Moessmer ◽  
Reiner Anwander
Keyword(s):  
Mesoporous Silica ◽  
Silica Nanoparticles ◽  
Heteronuclear Nmr ◽  
Mesoporous Silica Nanoparticles ◽  
X Ray Diffraction ◽  
Drift Spectroscopy ◽  
X Ray ◽  
Elemental Analyses

A series of tris(trimethylsilylmethyl) yttrium donor adduct complexes was synthesized and fully characterized by X-ray diffraction, 1H/13C/29Si/31P/89Y heteronuclear NMR and DRIFT spectroscopy as well as elemental analyses. Treatment of Y(CH2SiMe3)3(thf)x...

Reducing Microbiological Adhesion on Aluminum by Using Silver Nanocrystals Encapsulated in Mesoporous Silica Nanoparticles

2011 ◽  
Vol 236-238 ◽  
pp. 1775-1778 ◽  
Author(s):  
Li Hua Dong ◽  
Tao Liu ◽  
Li Zhang ◽  
Yan Sheng Yin
Keyword(s):  
Electron Microscopy ◽  
Mesoporous Silica ◽  
Silica Nanoparticles ◽  
Marine Bacterium ◽  
Mesoporous Silica Nanoparticles ◽  
Plate Count ◽  
X Ray Diffraction ◽  
Transmission Electron ◽  
Bacterial Growth Curve ◽  
Plate Count Method

In the present study, we report the preparation of silver nanocrystals encapsulated in mesoporous silica nanoparticles (Ag-MSN) with increased stability and enhanced anti-bacterial potency. The morphology of the nanoparticles was characterized by scanning electron microscopy and transmission electron microscopy. X-ray diffraction analyses proved that the silver nanocrystals were truly embedded in the mesoporous silica nanoparticles. The antibacterial effect of silver nanoparticles was proved by plate count method and bacterial growth curve. Moreover, the marine bacterium V. natriegens showed weak attachment to the aluminum coated with Ag -MSN. The mechanism of reducing microbiological adhesion was also discussed.

scholarly journals Synthesis of Hydrophobic and Hydrophilic Loaded Mesoporous Silica Nanoparticles for Controlled Co-Delivery of Drugs

2021 ◽  
Author(s):  
PRIYADHARSINI K ◽  
ANBUCHEZHIYAN M ◽  
SANGEETHA K ◽  
SENGUTTUVAN N ◽  
RAJENDRAN SRIBA
Keyword(s):  
Mesoporous Silica ◽  
Silica Nanoparticles ◽  
Mesoporous Silica Nanoparticles ◽  
Drug Carrier ◽  
Hexagonal Structure ◽  
X Ray Diffraction ◽  
Transmission Electron ◽  
Bet Analysis ◽  
Uv Visible ◽  
Dual Drug

Abstract Herein, a biocompatible and nontoxicity novel type of hydrophobic and hydrophilic co-delivery systems based on co-polymer chitosan-graft-PMMA (ch-g-PMMA) modified Mesoporous silica nanoparticles (MSNPs) for cancer therapy was prepared. The pores of MSNPs were loaded with curcumin (CUR) and doxorubicin (DOX) with co-polymer ch-g-PMMA were gated the pores of MSNPs to prevent the release of drugs. These synthesized ch-g-PMMA/MSNPs dual drug-loaded are effectively allowed for co-delivery of drug combinations with improved efficacy. The dual drug loaded MSNPS were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), UV-Visible spectroscopy (UV-Vis), Transmission electron microscope (TEM) and Brunauer–Emmett–Teller (BET) analysis. The TEM and XRD results proved the successful loading of drugs into the pores of hexagonal structure MSNPs with size ~180nm, CUR and DOX were released from the MSNPs only in acid –triggered manner. The cytotoxicity studied were carried out for ch-g-PMMA/MSNPs dual drug-loaded against adenocarcinoma gastric cell line (AGS) shows that MSNPs was highly biocompatible and well suitable for drug carrier.

Reducing Microbially-Influenced Corrosion on Aluminum by Using Organosiloxane Sol Film with Silver Nanocrystals

2012 ◽  
Vol 463-464 ◽  
pp. 1479-1483 ◽  
Author(s):  
Bing Yin ◽  
Tao Liu ◽  
Li Hua Dong ◽  
Li Zhang ◽  
Yan Sheng Yin
Keyword(s):  
Electron Microscopy ◽  
Mesoporous Silica ◽  
Silica Nanoparticles ◽  
Electrochemical Impedance ◽  
Mesoporous Silica Nanoparticles ◽  
Microbiologically Influenced Corrosion ◽  
X Ray Diffraction ◽  
Microbially Influenced Corrosion ◽  
Transmission Electron ◽  
Corrosion Resistance Property

Silver nanocrystals were encapsulated in mesoporous silica nanoparticles (Ag-MSN) to increase stability and enhance anti-bacterial potency. The morphology of the nanoparticles was characterized by scanning electron microscopy and transmission electron microscopy. X-ray diffraction analyses proved that the silver nanocrystals were truly embedded in the mesoporous silica nanoparticles. Electrochemical impedance spectroscopy was carried out to evaluate the effect of organosiloxane film containing Ag-MSN on reducing microbiologically influenced corrosion. The excellent corrosion resistance property showed that the sol film containing Ag-MSN could significantly decrease the V. natriegens adhesion and protect the aluminum against microbiological corrosion in seawater.

Recent Advances in Application of Azobenzenes Grafted on Mesoporous Silica Nanoparticles in Controlled Drug Delivery Systems Using Light as External Stimulus

2020 ◽  
Vol 20 (11) ◽  
pp. 1001-1016
Author(s):  
Sandra Ramírez-Rave ◽  
María Josefa Bernad-Bernad ◽  
Jesús Gracia-Mora ◽  
Anatoly K. Yatsimirsky
Keyword(s):  
Drug Delivery ◽  
Mesoporous Silica ◽  
Silica Nanoparticles ◽  
Drug Delivery Systems ◽  
Mesoporous Silica Nanoparticles ◽  
High Surface ◽  
Delivery Systems ◽  
Surface Reactivity ◽  
External Stimulus ◽  
Recent Advances

Hybrid materials based on Mesoporous Silica Nanoparticles (MSN) have attracted plentiful attention due to the versatility of their chemistry, and the field of Drug Delivery Systems (DDS) is not an exception. MSN present desirable biocompatibility, high surface area values, and a well-studied surface reactivity for tailoring a vast diversity of chemical moieties. Particularly important for DDS applications is the use of external stimuli for drug release. In this context, light is an exceptional alternative due to its high degree of spatiotemporal precision and non-invasive character, and a large number of promising DDS based on photoswitchable properties of azobenzenes have been recently reported. This review covers the recent advances in design of DDS using light as an external stimulus mostly based on literature published within last years with an emphasis on usually overlooked underlying chemistry, photophysical properties, and supramolecular complexation of azobenzenes.

Fluorescent spherical mesoporous silica nanoparticles loaded with emodin: Synthesis, cellular uptake and anticancer activity

2021 ◽  
Vol 119 ◽  
pp. 111619
Author(s):  
Paul Jänicke ◽  
Claudia Lennicke ◽  
Annette Meister ◽  
Barbara Seliger ◽  
Ludger A. Wessjohann ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Anticancer Activity ◽  
Silica Nanoparticles ◽  
Cellular Uptake ◽  
Mesoporous Silica Nanoparticles
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