Results 41 to 50 of about 21,892 (259)

Formation and characterization of inorganic membranes from zeolite-silica microcomposites [PDF]

open access: yes, 1988
Small crystals of zeolites (500-1000 nm) with two- and three-dimensional channel systems (faujasite and ZSM-5 structures) were embedded in amorphous thin films derived from TEOS hydrolyzed in alcoholic solution.
Barrer   +6 more
core   +1 more source

Sol-gel Process in Preparation of Organic-inorganic Hybrid Materials [PDF]

open access: yesKemija u Industriji, 2008
Organic-inorganic hybrid materials are a sort of nanostructured material in which the organic and inorganic phases are mixed at molecular level. The inorganic phase in hybrid materials is formed by the sol-gel process, which consists of reactions of ...
Macan, J
doaj  

Synthesis and robocasting of YAG xerogel: one-step conversion of ceramics

open access: yesScientific Reports, 2022
An optimized sol–gel protocol was carried out to produce an yttrium aluminum garnet (YAG) xerogel from aluminum alkoxide and an yttrium salt on a semi-pilot scale. This xerogel was successfully used without prior pyrolysis as a solid load with the aid of
Nancy Flores-Martinez   +6 more
doaj   +1 more source

Hybrid Nanostructures Based of Ta2O5-PMMA for Electronic Applications

open access: yesThe Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, 2023
The scientific interest on hybrid materials is mainly related to understanding the types of interactions between inorganic and organic component and the effect of these interactions on the properties of the new material formed.
Elena Emanuela HERBEI   +1 more
doaj   +1 more source

Bidentate N,O-prolinate ruthenium benzylidene catalyst highly active in RCM of disubstituted dienes [PDF]

open access: yes, 2007
The synthesis of a bidentate N,O-prolinate ruthenium benzylidene from commercially available starting materials and its activity in ring-closing metathesis of functionalized disubstituted dienes at 30 °C is ...
Grubbs, Robert H., Samec, Joseph S. M.
core   +3 more sources

Selective cyclodimerization of epichlorohydrin to dioxane derivatives over MOFs [PDF]

open access: yes, 2020
Glycerol can be converted to valuable products such as epichlorohydrin which is an important intermediate applied in various industries. For example, dioxane derivatives, which are important pharmaceuticals, can be obtained from epichlorohydrin.
Chaemchuen, Somboon   +7 more
core   +2 more sources

Strategies Toward Accessing Enantioenriched (Hetero)Benzo‐Fused 5‐ and 6‐ Membered Rings via Intermolecular Carbometalation

open access: yesAngewandte Chemie, EarlyView.
The use of transition‐metal catalysts and design of chiral ligands have allowed chemists to access highly functionalized benzofused 5‐ and 6‐ membered rings in high yield and enantioselectivity. A common strategy used relies on an intermolecular carbometalation across alkynes and olefins, usually followed by a subsequent intramolecular carbometalation.
Clara Jans   +3 more
wiley   +2 more sources

Alkenylation and Allylation of Aldehydes by Using an Ni/Cr/TDAE Redox System [PDF]

open access: yes, 2001
In 360 females, Bone mineral density (BMD) in lumbar vertebrae (L2-L4) was assessed by quantitative computed tomography (QCT), and the values obtained were compared with the frequency of vertebral transformation or fracture as assessed by lateral scan ...
Goto, Kentaro   +4 more
core   +1 more source

Recent Advances in Electrospun Nanofibers for Triboelectric Nanogenerators: Performance Enhancement Strategies and Emerging Applications

open access: yesAdvanced Materials, EarlyView.
This review highlights recent advances in electrospun nanofiber‐based triboelectric nanogenerators, emphasizing how material design, fiber architecture, and interface engineering collectively enhance output performance and mechanical durability. Key developments in porous, aligned, core‐shell, and hierarchical nanofibers are discussed alongside ...
MD Fajla Rabbi   +3 more
wiley   +1 more source

Tandem Reactivity of Metal−Carbon and Carbon−Silicon Bonds in Mononuclear α‐Silyl Organolithium or Organosodium Complexes Towards CO, CO2 and Heteroallenes

open access: yesAngewandte Chemie, EarlyView.
Anionic α‐silyl alkyl is one of the most used organometallic building blocks and funtional groups. Traditionally, the C─Si bond in these complexes is considered as inert. In this work, we report a series of reactions between mononuclear organo‐lithium and ‐sodium complexes with CO, CO2, or heteroallenes.
Xiao Yang   +8 more
wiley   +2 more sources

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