Scission of C-C covalent bonds in the brush backbone occurred due to steric repulsion between the adsorbed side chains, which generated bond tension on the order of several nano-Newtons. Unlike conventional chemical reactions, the rate of bond scission was shown to decrease with temperature. This...
1.4CleavageMethodsofCovalentBonds 在有机化学反应中,总是伴随着一部分旧共价键的断裂和新共价键的形成过 程。共价键有两种断裂方式,即均裂和异裂。 1.4.1HomolyticCleavage 在共价键断裂时,如果共用电子对均等地分配给两个成键原子,这种断裂方 式称为均裂。均裂生成两个带有未成对电子的原子或基团,称为游离基...
the EAS by the otherwise unreactive Au electrophile (STM tip or substrate). Intriguingly, this OEEF-catalyzed EAS reaction cleaves the inherently inert C(sp2)-C(sp2) bond21,22and leads to a ~97% high-yield formation of linear oligophenylenes terminated with covalent Au-C bonds. Note that...
Bond cleavage refers to the breaking of chemical bonds within a polymer due to thermal excitation, leading to the formation of macroradicals that undergo further reactions. AI generated definition based on: Encyclopedia of Spectroscopy and Spectrometry (Second Edition), 1999 ...
In high-molecular-weight glassy polymers, crack propagation is normally assumed to require the breaking of covalent bonds in polymer chains that span the crack path, as opposed to chain slip and disentanglement. The fraction of such broken chains in a bulk sample would be very small, however, ...
PM Boorman,X Gao,M Parvez - 《Journal of the Chemical Society Dalton Transactions》 被引量: 0发表: 1992年 The internal thioester and the covalent binding properties of the complement proteins C3 and C4 The covalent binding of complement components C3 and C4 is critical for their activities. Th...
The development of selective and robust heterogeneous oxidation catalysts is an enabling technology for conversion of biomass-derived platform chemicals. Vanadium active sites were incorporated into the structure of mesoporous silica via an ultra-fast, one-pot synthesis method based on microwave-assisted ...
Kidric et al., 2014). Depending on the position of thepeptide bonds, the proteases are divided into internalendopeptidases, C-terminalcarboxypeptidases, and N-terminalaminopeptidases(van der Hoorn, 2008). The protease content during the development process is strictly regulated, and many of them...
The nature and importance of the inter-ε chain disulfide bonds in human IgE IgE antibodies are best known for their pathological role in allergy. The class-specific effector sites are located in the ε chains; these form covalent d... Birgit,A.,Helm,... - 《European Journal of Immunology...
N. Substrate and pH-dependent kinetic profile of 3-mercaptopropionate dioxygenase from Pseudomonas aeruginosa. Biochemistry 55, 1362–1371 (2016). Article CAS PubMed Google Scholar Cottrell, T.L. The Strengths of Chemical Bonds. 2nd edn. (Butterworths Scientific, 1958). Sahu, S. et al. ...