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Showing 1 to 10 of 10 for “"isobutylene"”.
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Peptide/Protein Stapling and Unstapling: Introduction and Photorelease of Isobutylene Graft
… a new peptide-macrocyclisation strategy with an isobutylene graft. The reaction is mild and proceeds rapidly and efficiently both with linear and cyclic peptide substrates. The resulting isobutylene-grafted peptides possess improved passive membrane permeability, and are stable in human plasma …
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New block copolymers of Isobutylene by combination of cationic and anionic polymerizations
… thesis deal with the new block copolymers of isobutylene by combination of cationic and anionic polymerizations, which are new materials with numerous promising potential applications. A new method for the synthesis of tailored polyisobutylene(PIB)-based block copolymer by combination of …
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Synthesis and CD4 down-modulation potencies of CADA head analogs
… to the target in an unsymmetrical manner. The isobutylene head group of CADA is believed to favor this unsymmetrical conformation of the 12-membered ring. We proposed that other head groups might more effectively pre-organize the proposed bioactive conformation and may yield very potent CADA …
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Studies of the cationic polymerisation of vinylic and energetic cyclic ether monomers
… ester (-ON02) groups, substituted styrenes and isobutylene has been investigated. The main reaction studied has been the ring-opening polymerisation of 3- (nitratomethyl)-3-methyl oxetane (NIMMO) using the alcohol/BF3.0Et2 binary initiator system. A series of di-, tri- and tetrafunctional …
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Direct Chain-End Functionalization of Living Polyisobutylene With Phenoxyalkyl(meth)acrylates
… measurements md1cated that all of the isobutylene monomer had been consumed. All difunct10nal, telechehc macromonomers obtamed were charactenzed by proton (1H) and carbon (13C) NMR, GPC and MALDI-TOF MS This study represents a novel method of generatmg telechehc polyisobutylene …
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Functionalized Polyisobutylene: From Synthesis to Properties and Applications
Polyisobutylene (PIB) is a polymer well known for its desirable properties such as high chemical stability, impermeability to gases, and biocompatibility in certain applications. However in some applications it is limited by properties such as high hydrophobicity, lack of chemical functionalities, …
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Computational Studies of Protonated Cyclic Ethers and Benzylic Organolithium Compounds
… for DFT methods in modeling the protonated isobutylene oxide is due to the weakness of this C2-O bond. Protonated epoxides featuring more symmetrical charge distribution and cyclic homologues featuring less ring strain are treated with greater accuracy by B3LYP. Ion-pair separation (IPS) of …
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Nanotexturing for Biomedical Implants
… drug delivery coating. Arbomatrix (poly (isobutylene-b-p-methylstyrene)) is an elastomeric polymer that is bioinert with mechanical properties similar to silicone rubber. The proposed work will consist of three layers, a substrate, electrospun PEO nanofiber, and a thin continuous coating …
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Upconversion Nanoparticles for pH Sensing and Imaging
… ligands, polyethylenimine (PEI) and poly(isobutylene-alt-maleic anhydride) (PMA), respectively, to enable dispersion in aqueous solutions. The effect of two anthraquinone dyes, Calcium Red and Alizarin Red S, on UCNPs was measured by spectroscopic techniques at various pHs. When the …
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Designing Volatile Molybdenum Compounds for Vapour-Phase Deposition
… a nitrido-amido adduct (tBuNH)MoNCl2 and isobutylene. Ultimately, the molybdenum species undergoes further decomposition to yield tert-butylamine and Mo2N. The mechanism of thermolysis has been investigated using computational methods, and the computed activation barrier was confirmed …