Silacrown modified xerogels as functional hybrid materials for carbon composite electrodes

Algae–silica systems as functional hybrid materials

“…6Ba) shows several signals at À49.3 ppm (T 1 ), À58.1 ppm (T 2 ), À67.9 ppm (T 3 ), À101.1 ppm (Q 3 ), and À111.7 ppm (Q 4 ). 30,31 The relative areas of T 1 /T 2 /T 3 signals in this material are 11/50/39, which indicates that only 39% of Si atoms from MAPTS were involved in three Si-O-Si bonds. In contrast, Q 3 /Q 4 signals show relative areas of 35/65, showing that 35% of Si atoms from TMOS are bearing one -OH group.…”

“…The spectrum of the MAPTS/TMOS system shows various components in this region, indicating a complex environment for the Si atoms in this matrix as well as the n s(C-O) vibrational mode of the methacryloxy group. 31 The 29 Si solid-state NMR spectrum of the MAPTS/TMOS system (Fig. 6Ba) shows several signals at À49.3 ppm (T 1 ), À58.1 ppm (T 2 ), À67.9 ppm (T 3 ), À101.1 ppm (Q 3 ), and À111.7 ppm (Q 4 ).…”

Hybrid and biohybrid silicate based materials: molecular vs. block-assembling bottom–up processes

“…5b). 58,[69][70][71][72][73][74] The use of precursors such as TEOS or TMOS incorporating crown-ethers such as 12C4, 15C5 and 18C6 generates organosiloxane matrices with low flexibility and high fragility, that prevent their use for film preparations, contrarily to the hybrids formed by intercalation of the macrocyles into layered silicates. It is crucial to use precursors containing alkyl-or alkenyl-chains, such as ETEOS and MAPTMS, to give organopolysiloxane matrices with improved physical properties that allow their processing as continuous films.…”

“…Membranes based on the hybrids resulting from the assembly of macrocycles and silica matrices that incorporate those species act as potentiometric electrodes for ion-recognition. [73][74][75] However, these systems are unable to work as solid electrolytes due to ion-pair recombination effects inside these dense silica matrices. In the macrocycle-layered silicates intercalation materials the host silicate acts as an immobile anion while the cations are able to move under an electrical field and therefore these systems can behave as solid electrolytes.…”

One-Step Patterning of Hybrid Xerogel Materials for the Fabrication of Disposable Solid-State Light Emitters

“…The sol–gel chemistry has been shown to provide a means of entrapping a great variety of (bio)chemical species, from small organic molecules, − to enzymes, , living cells and other microorganisms, , and also nanoparticles , in a solid matrix while preserving their functionality. Thus, a large variety of doped hybrid organic–inorganic materials have been applied for different purposes, including the fabrication of sensor and biosensor devices ,− and the development of commercially available products, such as smart drug delivery carriers for bone tissue regeneration…”