Potential Use as Material

The studies on the chemical synthesis of 0-acyl chitins were followed by studies on their biocompatibihty, and hence their potential use as materials for blood contacting surfaces has been investigated by measuring, inter... 

Conjugated polymers substituted by optically active groups, potentially useful as materials for enantiose-lective modified electrodes, have been prepared [174]. Some polymers have been synthesized by electropolymerization of enantiomeric monomers [175]. The polymers exhibited high stability and conductivity. The specific rotations are anomalously high, which has been interpreted by a macromolecular asymmetry arising from an helical polymer structure [176]. Electropolymerization of (S)-( -I- )-3-(2-methylbutyl)-thiophene provided another example of chiral polythiophene [177]. 

Uranium and mixed uranium—plutonium nitrides have a potential use as nuclear fuels for lead cooled fast reactors (136—139). Reactors of this type have been proposed for use ia deep-sea research vehicles (136). However, similar to the oxides, ia order for these materials to be useful as fuels, the nitrides must have an appropriate size and shape, ie, spheres. Microspheres of uranium nitrides have been fabricated by internal gelation and carbothermic reduction (140,141). Another use for uranium nitrides is as a catalyst for the cracking of NH at 550°C, which results ia high yields of H2 (142). 

Two classes of metals have been examined for potential use as catalytic materials for automobile exhaust control. These consist of some of the transitional base metal series, for instance, cobalt, copper, chromium, nickel, manganese, and vanadium and the precious metal series consisting of platinum [7440-06-4], Pt palladium [7440-05-3], Pd rhodium [7440-16-6], Rh iridium, [7439-88-5], Ir and mthenium [7440-18-8], Ru. Specific catalyst activities are shown in Table 3. 

Acryloid and Plexigum. These were soft gummy products of interest as surface coatings rather than as mouldable plastics materials. About 1930 R. Hill in England and W. Bauer in Germany independently prepared poly(methyl methacrylate) and found it to be a rigid, transparent polymer, potentially useful as an aircraft glazing material. ... 

Gallium compounds that incorporate amidinate ligands have been studied because of their potential use as volatile precursors to nitride materials.The two most common classes of Ga amidinate compounds, however, are [RC(NR )2]GaX2 species, X = Cl, alkyl I in Scheme 32), in which one amidinate... 

Burning of plastics is not a favourable option, given the widespread concern over the global increase in carbon dioxide. Nonetheless these materials are potentially useful as fuels, and burying them simply wastes their potential... 

The Rh complexes (cod)Rh[ jt-OSi(0 Bu)3] 2 and (nbd)Rh[ jt-OSi (0 Bu)3] 2 thermally decompose primarily via loss of HOSi(O Bu)3 and formation of Rh metal particles, rendering them ineffective for use as precursors to Rh/Si/0 materials however, these complexes are potentially useful as sources of Rh nanoparticles or site-isolated Rh species via grafting methods [99]. 

Most spent foundry sand discarded is green sand. The primary components of green sand are silica and bentonite. Thus, green sands are essentially a sand-bentonite mixture, which makes them potentially useful as a liner and cover materials, that is, for hydraulic barrier layers. 

In situ methods have potential use as an interim or emergency measure until dredging can be undertaken or as a primary remedial action where it is determined to be more cost-effective than removal. The biggest advantages are that they are much less costly than dredging, eliminate the need for dredged material management, and minimize the resuspension of contained sediments.15... 

J.K. Kallitsis, K.G. Gravalos, A. Hilberer, and G. Hadziioannou, Soluble polymers with laterally attached oligophenyl units for potential use as blue luminescent materials, Macromolecules, 30 2989-2996, 1997. 

Stabilization of the redox cycle is relatively important in construction of potentially useful electrochromic materials, because the molecules needed for application require high redox-stability. Recently, S. Hiinig et al. proposed the concept of violene-cyanine hybrid to produce stabilized organic electrochromic materials (3). The hybrid is constructed by a violene-type redox system containing delocalized closed-shell polymethine dyes as end groups. The hybrid is expected to exhibit the color of a cyanine dye, by an overall two-electron... 

Recently, however, the interest in their redox capacity is growing in relation to their potential use as conducting materials, thus the... 

Summarizing, noncovalent functionalization methods can be used to prepare materials with specific biological properties because they are quick, efficient and clean. In order to increase biocompatibility of carbon nanostructures, these materials now need to be integrated into living systems and to be potentially used as tissue regeneration scaffolds, prostheses or drug deliverers. 

In addition to their potential use as structural composites, these macroscopic assemblies of nanocarbons have shown promise as mechanical sensors [83], artificial muscles [84], capacitors [85], electrical wires [59], battery elements [85], dye-sensitized solar cells [86], transparent conductors [87], etc. What stands out is not only the wide range of properties of these type of materials but also the possibility of engineering them to produce such diverse structures, ranging from transparent films to woven fibers. This versatility derives from their hierarchical structure consisting of multiple nano building blocks that are assembled from bottom to top. 

Chinese chemists have reported the synthesis of pentacyclo[4.3.0.0 , 0 ]nonane-2,4-bis(trinitroethyl ester) (88). This compound may find potential use as an energetic plastisizer in futuristic explosive and propellant formulations. The synthesis of (88) uses widely available hydroquinone (81) as a starting material. Thus, bromination of (81), followed by oxidation, Diels-Alder cycloaddition with cyclopentadiene, and photochemical [2 - - 2] cycloaddition, yields the dione (85) as a mixture of diastereoisomers, (85a) and (85b). Favorskii rearrangement of this mixture yields the dicarboxylic acid as a mixture of isomers, (86a) and (86b), which on further reaction with thionyl chloride, followed by treating the resulting acid chlorides with 2,2,2-trinitroethanol, gives the energetic plastisizer (88) as a mixture of isomers, (88a) and (88b). Improvements in the synthesis of nitroform, and hence 2,2,2-trinitroethanol, makes the future application of this product attractive. 

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