synthesized for supramolecular binding study of fullerenesC60 and C70. Binding constants for C60 in chlorobenzene, toluene, toluene–CH2Cl2 and CS2 have been calculated for different hosts and a direct structure–affinity relationship has been established. As predicted, receptors with two exTTF moieties (1, 3 and 4) have demonstrated higher binding abilities toward C70 than C60. Depending on the linker used
A great variety of mono- and polytopicβ-cyclodextrinhosts have been easily synthesized by using the CuI-catalyzed azide–alkyne cycloaddition reaction. Of particular interest for their multibinding properties, dimeric and trimeric CD compounds were obtained by “clicking” mono-6-azido-β-cyclodextrin derivatives with flexible or rigid dialkynyl spacers. The reaction is general, high-yielding for some
Thermomechanical Formation–Structure–Property Relationships in Photopolymerized Copper-Catalyzed Azide–Alkyne (CuAAC) Networks
作者:Austin Baranek、Han Byul Song、Mathew McBride、Patricia Finnegan、Christopher N. Bowman
DOI:10.1021/acs.macromol.6b00137
日期:2016.2.23
Bulk photopolymerization of a library of synthesized multifunctional azides and alkynes was carried out toward developing structure property relationships for CuAAC-based polymer networks. Multifunctional azides and alkynes were formulated with a copper catalyst and a photoinitiator, cured, and analyzed for their mechanical properties. Material properties such as the glass transition temperatures (T-g) show a strong dependence on monomer structure with T-g values ranging from 41 to 90 degrees C for the series of CuAAC monomers synthesized in this study. Compared to the triazoles, analogous thioether-based polymer networks exhibit a 45-49 degrees C lower T-g whereas analogous monomers composed of ethers in place of carbamates exhibit a 40 degrees C lower T-g. Here, the formation of the triazole moiety during the polymerization represents a critical component in dictating the material properties of the ultimate polymer network where material properties such as the rubbery modulus, cross-link density, and T-g all exhibit strong dependence on polymerization conversion, monomer composition, and structure postgelation.
NOVEL COMPOSITE COMPOSITIONS AND METHODS OF PREPARING AND USING SAME
申请人:THE REGENTS OF THE UNIVERSITY OF COLORADO, A BODY CORPORATE
公开号:US20150267002A1
公开(公告)日:2015-09-24
The present invention includes compositions comprising an alkyne-based substrate, an azide-based substrate, optionally a Cu(II) salt and optionally a photoinducible reducing agent. The present invention further includes a method of preparing composite materials that are suitable for use as dental implants using the compositions of the invention.