homolysis

(redirected from Homolytic)
Also found in: Dictionary, Medical.
Related to Homolytic: Homolytic fission

homolysis

[hə′mäl·ə·sis]
(organic chemistry)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The pristine PI shows a free radical signal assigned to minority homolytic bond cleavage during the imidization process.
It is also reported by hydrogen atom transfer (HAT), single electron transfer followed by proton transfer (SETPT) and sequential proton loss electron transfer (SPLET) mechanisms of morin, that 3-OH group is the most favored site for homolytic O-H breaking; on the other hand 5-OH group is not involved in the antioxidant mechanism; the main reason lying behind this is that the 5-OH group forms a strong H-bonding with O4 atom in parent molecule and 7-OH group is also preferred in radical inactivation.
Therefore, the strong heat should lead to [O.sub.2] homolytic dissociation rather than to ionization.
The radicals, which are formed by the homolytic splitting of the oxidant's O-O bonds, transform the chemical structures of target chelating agents [143,144].
Free radical can be formed in three ways: (1) By Homolytic Fission: Radicals can easily be formed when a covalent bond is broken if one electron from each of the pair shared remains with each atom.
(29), (34), (36) This high energy of the siloxane bond gives rise to its strong resistance to homolytic cleavage.
The hydroxyl radical is formed in vivo by high energy irradiation leading to homolytic cleavage of water or from [H.
The light-induced homolytic nitrogen-oxygen bond cleavage of N-methoxy nitrogen onium salts produces two transient species, each of which has been shown to damage DNA.
Among their topics are organic vapor-phase deposition, magnetic field effects in the materials and devices, the role of homolytic reactions in the intrinsic degradation of organic light-emitting diodes, vertical-type organic transistors, mixed molecular heterojunction photovoltaic cells, organic light-emitting diode materials and device architectures for full-color displays and solid-state lighting, and chemical and biological sensors.
Homolytic decomposition of the free base dissolved in the LDL particle gave rise primarily to carbon-centered alkyl radicals that were immediately converted, due to the presence of oxygen, into alkyl peroxyl radicals without generating [H.sub.2][O.sub.2] as an intermediate (Niki et al.
According to these authors, it begins with the absorption of UV light by the polymer, or by another component of the lining, producing a high energy excited state, capable of resulting in homolytic bond scission, generating free radicals.