Stability molecule

Introducing long aliphatic chains into a stabilizer molecule decreases volatility and increases solubility in hydrocarbon polymers. This improves performance. However, it also increases the equivalent weight of the active moiety. Di- and polyphenoHc antioxidants combine relatively low equivalent... 

Radical stability can often be explained in the same way as ion stability molecules that delocalize unpaired electrons tend to be more stable. Display spin density surfaces for 1-propyl and 2-propyl radicals. In which is the unpaired electron more delocalized Is this also the lower-energy radical ... 

Stabilizer molecule Monomer molecule Initiator molecule Primary radical Oligomeric radical... 

Jorgensen CK (1981) The Conditions for Total Symmetry Stabilizing Molecules, Atoms, Nuclei and Hadrons. 43 1-36... 

Since amine-phosphorus(III) halide condensation reactions are well-established low-energy routes to phosphorus-nitrogen bonds, they provide a logical starting point for examination of skeletally stabilized molecule synthesis. For our initial studies, reactants that are phenyl substituted as opposed to alkyl substituted... 

Is the UV-stabilization only due to the screening effect (or more precisely light absorbing effect in a spectral region where the absorption spectra of polymer and UV-stabilizer overlap) of the UV-stabilizers and/or can it be enhanced by an energy transfer from the excited polymer to the stabilizer molecule ... 

Deactivation of the excited stabilizer molecule in its excited singlet (screening effect) and triplet state (energy transfer). 

H, 13C, 117Sn and 119Sn NMR and polarimetry. Coordination of the tin atom to the amino group in the y-position stabilizes molecules of general structure 35. The chiral group R of compound 36 (see below this table), for example, induces chirality at the Sn centre. A slow racemization of the Sn centre takes place in solution, especially when the y-amino group is attached to a flexible substituent. See also next entry. ... 

The dependence of the fluorescence quantum yields and lifetimes of these stabilizers on the nature of the solvent suggests that the excited-state, non-radiative processes are affected by solvation. In polar, hydroxylic solvents, values of the fluorescence quantum yield for the non proton-transferred form are significantly lower, and the fluorescence lifetimes are shorter, than those calculated for aprotic solvents. This supports the proposal of the formation, in alcoholic solvents, of an excited-state encounter complex which facilitates ESIPT. The observed concentration dependence of the fluorescence lifetime and intensity of the blue emission from TIN in polymer films provides evidence for a non-radiative, self-quenching process, possibly due to aggregation of the stabilizer molecules. 

Degradation of organics could be performed by (a) direct reactions with highly reactive species (OH radicals), (b) indirect reactions over radicals formed from stabile molecules (H2O2), and (c) direct reactions with stabile molecules. 

Competitive adsorption of molecules at interfaces, or the displacement of one stabilizing molecule by another, is an important process in food manufacture. Molecular rearrangement at interfaces not only affects the... 

The structural design of a fuel stabilizer molecule can enable some compounds to function in metal ion chelation. Most stabilizers have nitrogen atoms within the structure of the compound. The electron pair on nitrogen can function in metal chelation if the nitrogen atoms are oriented in the appropriate conformation. 

The reaction of CH3 with OH has two exit channels formation of the stabilized molecule CH3OH, or the product-formation reaction giving CH2OH + H. 

The base removes a hydrogen ion to form a resonance-stabilized molecule. 

Manz, J., Meyer, R., Poliak, E., Romelt, J., and Schor, H.H.R. (1984). On spectroscopic properties and isotope effects of vibrationally stabilized molecules, Chem. Phys. 83, 333-343. 

Chelates and other effects serving as stabilizing molecules for complex compounds have been discussed repeatedly in scientific [116,117] and educational literature [1,2,10] and, in this respect, do not require additional examination. 

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