Metal oxide modification via transition metal complexes: hybrid materials characterizations and potential applications in molecular recognition

Bordelanne, Olivier; Delville, Marie-Hélène

doi:10.1016/s1293-2558(02)01323-7

Cited by 16 publications

(19 citation statements)

References 47 publications

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“…W is the weight loss, M CF is weight loss in the temperature range of 160–650°C, SA is the specific surface area of the alumina filler (130 m 2 g −1 ). Thus, the amount of surface functionalization, Q TGA was found to be 16.5 ± 0.3 µmol m −2 .…”

Section: Resultsmentioning

confidence: 92%

“…The amino‐silane functionalized PVB matrix also shows a reduction in degradation temperature and its incorporation in the matrix does not increase the thermal stability of the PVB matrix. Further, the reason for insignificant improvement in thermal properties of alumina fillers to the polymer is the possibility of aggregation of nanoparticles in the PVB matrix at higher loadings .…”

Section: Resultsmentioning

confidence: 99%

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Effect of silane functionalized alumina on poly(vinyl butyral) nanocomposite films: Thermal, mechanical, and moisture barrier studies

et al. 2013

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In this work, a hybrid‐polymer nanocomposite film, based on polyvinyl butyral/amino‐silane functionalized nano alumina, was fabricated by melt processing. The calcium degradation measurements suggest the functionalized nanocomposite films exhibit higher resistance towards moisture penetration as compared to the neat alumina loaded films. Thermal stability, mechanical strength, and contact angle studies of the composites were also conducted to evaluate the performance of the functionalized alumina loaded films. These nanocomposite films were encapsulated over Al/P3HT/ITO Schottky structured device. The changes observed in the current density of the devices to the applied voltage before and after accelerated aging conditions are presented. The nanocomposite with functionalized alumina films exhibits 50% change in current density, which is superior to that attained with neat and non‐functionalized films. POLYM. COMPOS., 35:1426–1435, 2014. © 2013 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Effect of silane functionalized alumina on poly(vinyl butyral) nanocomposite films: Thermal, mechanical, and moisture barrier studies

et al. 2013

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“…As the attachment of the organic ligands is by covalent linkages, even after PRM attachment, the organic components start decomposing at about the same temperature to that of amine functionalization. This difference in the weight loss was further used to calculate the approximate grafting density of the ligands in the surface . The grafting density of amino groups onto MSNs was calculated to be approximately 2.1 (mmol g −1 ) and the protamine (molecular weight of ≈5 kDa) immobilization efficiency was found to be approximately 0.042 (mmol g −1 ).…”

Section: Resultsmentioning

confidence: 99%

Protamine‐Capped Mesoporous Silica Nanoparticles for Biologically Triggered Drug Release

Radhakrishnan

Gupta

Gnanadhas

et al. 2013

Part & Part Syst Charact

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The fabrication of a mesoporous silica nanoparticle (MSN)−protamine hybrid system (MSN−PRM) is reported that selectively releases drugs in the presence of specific enzyme triggers present in the proximity of cancer cells. The enzyme trigger involved is a protease called trypsin, which is overexpressed in certain specific pathological conditions, such as inflammation and cancer. Overexpression of trypsin is known to be associated with invasion, metastasis, and growth in several cancers, such as leukemia, colon cancer, and colorectal cancer. The current system (MSN–PRM) consists of an MSN support in which mesopores are capped with an FDA‐approved peptide drug protamine, which effectively blocks the outward diffusion of the drug molecules from the mesopores of the MSNs. On exposure to the enzyme trigger, the protamine cap disintegrates, opening up the molecular gates and releasing the entrapped drug molecules. The system exhibits minimal premature release in the absence of the trigger and selectively releases the encapsulated drugs in the presence of the proteases secreted by colorectal cancer cells. The ability of the MSN–PRM particles to deliver anticancer drugs to colorectal cancer cells has also been demonstrated. The hydrophobic drug is released into cancer cells subsequent to disintegration of the protamine cap, resulting in cell death. Drug‐induced cell death in colorectal cancer cells is significantly enhanced when the hydrophobic drug that is known to degrade in aqueous environments is encapsulated in the MSN–PRM system in comparison to the free drug (P < 0.05). The system, which shows good biocompatibility and selective drug release, is a promising platform for cancer specific drug delivery.

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“…Another suitable method of modification of silica gel is through chemical modification. The latter method can be done through organofunctionalization using organic group as modifying agent or inorganofunctionalization using organometallic composite or metallic oxide in which the group is anchored on the surface [17].…”

Section: Introductionmentioning

confidence: 99%

Phosphonate Modified Silica for Adsorption of Co(II), Ni(II), Cu(II), and Zn(II)

Widjonarko¹,

Jumina²,

Kartini³

et al. 2014

Indones. J. Chem.

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A new phosphonate modified silica (PMS) has been investigated for adsorption of Co(II), Ni(II), Cu(II), andZn (II) II)>Co(II)>Ni(II)>Zn(II). Based on the adsorption characteristic, the adsorbent is promising to be applied as a material for solid phase extraction of transition metal ions. Keywords: modified silica; phosphonate; adsorption ABSTRAK Suatu silika termodifikasi fosfonat (STF) baru telah dikaji sebagai adsorben larutan Co(II), Ni(II), Cu(II), dan Zn(II). STF disintesis dengan mengimobilisasi aminoetil dihidrogen fosfat (AEPH

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Metal oxide modification via transition metal complexes: hybrid materials characterizations and potential applications in molecular recognition

Cited by 16 publications

References 47 publications

Effect of silane functionalized alumina on poly(vinyl butyral) nanocomposite films: Thermal, mechanical, and moisture barrier studies

Effect of silane functionalized alumina on poly(vinyl butyral) nanocomposite films: Thermal, mechanical, and moisture barrier studies

Protamine‐Capped Mesoporous Silica Nanoparticles for Biologically Triggered Drug Release

Phosphonate Modified Silica for Adsorption of Co(II), Ni(II), Cu(II), and Zn(II)

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