Caged radical
Many manifestations of the cage effect exist. In free radical polymerization, radicals formed from the decomposition of an initiator molecule are surrounded by a cage consisting of solvent and/or monomer molecules. Within the cage, the free radicals undergo many collisions leading to their recombination … See more In chemistry, the cage effect (also known as geminate recombination ) describes how the properties of a molecule are affected by its surroundings. First introduced by Franck and Rabinowitch in 1934, the cage … See more The cage effect can be quantitatively described as the cage recombination efficiency Fc where: $${\displaystyle F_{c}=k_{c}/(k_{c}+k_{d})}$$ Here Fc is defined … See more • Solvent effects • Carrier generation and recombination • Rate-determining step See more In free radical polymerization, the rate of initiation is dependent on how effective the initiator is. Low initiator efficiency, ƒ, is largely attributed to … See more Websolvent caged radical pairs that are different from each other. Predicting the photochemical cage pair recombination efficiency (F cP) is the major topic of this dissertation. However, there is also the collisional cage recombination efficiency (F cʹ).
Caged radical
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WebMay 14, 2024 · The effect of viscosity on the diffusion efficiency (F dif) of an organic radical pair in a solvent cage and the termination mechanism, that is, the selectivity of … WebJan 23, 2002 · These observations, together with the previously reported experimental evidence, seem to support the "radical" mechanism for the first step of the ozonation of the C-H bonds in hydrocarbons, i.e., the formation of the caged radical pair (R(**)OOOH), which allows both (a) collapse of the radical pair to ROOOH and (b) the abstraction of …
WebSep 16, 2009 · Kinetic evidence indicates that these products evolve from initial formation of a caged radical intermediate [Fe(IV)=O *NO(2)]. This caged pair reacts mainly via internal return with a rate constant k(r) to form metMb and nitrate in an oxygen rebound scenario. Detectable amounts of ferrylMb are observed by stopped-flow spectrophotometry ... WebThis caged radical pair then evolves on a complicated energy landscape through a number of reaction pathways, such as oxygen rebound to form R-OH, rebound to a non-oxygen …
WebRadical Cage Effects - Macmillan Group WebA spin density map (dark blue grid) of the perfluorocubane radical anion shows the electron sitting inside the cage Researchers in Japan have made perfluorocubane for the first time. When reduced, the molecule can hold a single electron inside its box-like structure – an unusual, real-life example of the quantum mechanical ‘particle in a ...
WebS-Nitrosothiols (RSNO) are exogenous and endogenous sources of nitric oxide in biological systems due to facile homolytic cleavage of the S–N bonds. By following the photolytic …
WebJan 1, 2001 · The radical cage effect is briefly reviewed with an emphasis on how radical mass and size affect the cage recombination efficiencies (F cP) of radical cage … gibsob yummy fleeceWebSolvent-caged radical rebinding dynamics are studied using non-equilibrium 2DIR and dispersed vibrational echo spectroscopy. © 2010 Optical Society of America PDF Article frs holdingWebFind 19 ways to say CAGED, along with antonyms, related words, and example sentences at Thesaurus.com, the world's most trusted free thesaurus. fr shoal\u0027sWebThe host–guest complex of a molecular cage and organic radical in principle could function as a profluorescent radical probe if the cage is inherently emissive, similar to the … frs holdings incWebSep 21, 1982 · The results of a study of the reactions of HCo(CO) 4 and HMn(CO) 5 with a variety of a substituted cyclopropenes are consistent with the formation of the intermediate caged radical pairs; recombination in the cage of the radical pair leads to hydroformylation, and cage escape leads to hydrogenation. Steric factors play an important role in … gibs of gloryWebThe proportion of radicals that escape the solvent cage to form initiating radicals is termed the initiator efficiency (ƒ) which is formally defined as follows (eqn [1] ): where n is the number of moles of radicals generated per mole of initiator. In some texts, the initiator efficiency ( f) is defined simply in terms of the yield of initiator ... gibsn custom shop j-160eWebWhen the photolysis was performed in solid CO ice, no isomerization occurs due to CO-trapping of the initially generated ˙Cl atoms by forming caged radical pair ClCO˙⋯˙PO 2. Concomitantly, photolytic reduction of ClPO 2 to ClPO by CO has been observed, yielding a weakly bonded molecular complex consisting of ClPO and CO 2 2, ClOPO, and the ... gibs olomouc