Energy of triplet

Zeng Y, Biczok L and Linschitz H 1992 External heavy atom induced phosphorescence emission of fullerenes the energy of triplet Cgg J. Phys. Chem. 96 5237-9... 

Methoxy radical 210 Methyl-de-diazoniation 253 Methylene, energy of triplet state 178 Molecular orbital method, applications to ArNj structure and to dediazoniations - ab initio 84ff., 177ff., 270, 280... 

P-type delayed fluorescence, 210-212 determination of 0jsc, 232, 236-237 energy of triplet state, 210-212 Pyrazine, 269, 270, 271 Pyrocalciferol, 411... 

In 1970, Bender and Schaefer " reported afc initio computations of triplet methylene. Employing the CISD/DZ method, they computed the energy of triplet methylene at 48 different geometries, varying the C-H distance and H-C-H angle. Fitting this surface to a quadratic function, they predicted that the H-C-H angle is 135.1°, and emphatically concluded that the molecule is not linear. 

Triplet state data for azobenzene-type azo compounds are very limited. Direct absorption of a 0.51 mol solution in C7H15J in 5 cm cells has not been detectable. Neither has phosphorescence been detected. The energy of triplet states has been located only by chemical spectroscopy, i.e., the quenching of other molecules triplet states by azobenzene. Ronayette et found two relevant triplet states at about 196 and 180 kj moH... 

Table 9 CASSCF energies of triplet states of D2a distorted CrX4 complexes3,13 used to deduce AOM parameters ea and en for the Cr-X bond and B and their AILFT values0 ...

In the class of quenchers, the nickel chelates are the most well known. For additives that are known to stabilize polyolefins, various attempts have been made to demonstrate energy-transfer to this type of molecules in liquid as well as in solid phase. For example, Briggs and McKellar [21] have shown that nickel (Ni(II)) chelates that are effective UV stabilizers for PP, are efficient acceptors for the excitation energy of triplet anthracene too. From this result it was concluded that the Ni chelates act as quencher in PP. However, this conclusion can be argued because anthracene cannot be expected to be an adequate model for the polypropylene carbonyl chromophores, because the excitation energy of triplet anthracene is 42 kcal/mole, whereas the value for an aliphatic ketone is —74kcal/mole [22]. Efficient energy transfer usually... 

Th e photochemistry of alkenes attract a great deal of attention and it startes a new era in organic synthesis. Electronically excited olefinic bond gives a number of reactions like isomerisation, dimerisation, intermolecular addition and many more. The energy of triplet excited state T, of an alkene is lower than that of excited singlet state Si. However intermolecular system crossing [ISC] is inefficient and in order to examine reactions of the triplet excited state, population of this state must be achieved by sensitisation. 

The excited state energies of triplet ketones are solvent polarity dependent. In the case of acetone, the variation from polar (79.4 kcal/mol) to non-polar solvents (78.9 kcal/mol) is only 0. 5 kcal/ mol. Please see Reference 23. 

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