Inductive-resonant mechanism of nonradiative transitions in ions and molecules in condensed phase

Inductive-Resonant Theory of Nonradiative Transitions for Complex Organic Molecules in Condensed Phase

“…The deuteration of complex results in an identical variation of τph and phosphorescence yield which points out that in this system knr and kr are varying in exactly parallel manner [15]. Data on rate constants of radiative and nonradiative transitions from individual sublevels of triplet states of a number of molecules collected in paper [13] also demonstrate the approximate parallelism of k nr and kr . The exact proportionality of knr and kr cannot be achieved for the last case because radiative transitions from individual sublevels of triplet state have different orientations about molecule and as a result, have different interactions with promoting-accepting vibrations.…”

“…The exact proportionality of knr and kr cannot be achieved for the last case because radiative transitions from individual sublevels of triplet state have different orientations about molecule and as a result, have different interactions with promoting-accepting vibrations. The idea of proportionality between a rate constant of nonradiative T1-S0 transition in a molecule and a rate constant competing with its radiative transition is not pertinent only to our works [7,11,13] but can also be found in other articles [16,17].…”

“…The inductive-resonant theory of nonradiative transitions [13] predicts all nonradiative transition regularities and k nr magnitudes in themselves for lanthanide and transition metal ions in condensed matter and a number of regularities for organic molecules [11,13]. Under some assumptions the inductive-resonant theory is able to account for the difference in the influence of substitutents on kir for T1 -S0 transitions as will be shown below.…”

“…The authors of Refs. [11][12][13] pointed out that the consideration of only vibrational part of matrix element of nonradiative transitions allows one to account for the effect of full deuteration of molecules on knr , but such consideration cannot explain the knr dependence on position of atoms substituted in molecules and cannot explain the difference in k nr magnitude for transitions from triplet sublevels under low temperatures. Henry and Siebrand [12] are of the opinion that only the inclusion of HsO operator and consideration of electronic term consisting of one-center integrals allows one to explain the locality of effects because the largest matrix element is encountered when the highest local π-electron density coincides with the largest local out-of-plane amplitude of C-H vibration.…”

Спектральная Сенсибилизация Фото-Эдс В Монокристаллическом Кремнии

“…Спектры сенсибилизированного фотоэффекта смещены относительно спектров фильтрового эффекта (рисунок, кривые 3 и 4). Это обусловлено тем, что в соответствии с теорией индуктивно-резонансного безызлучательного переноса энергии эффективность этого процесса K зависит от интеграла перекрытия спектра люминесценции донора и спектра поглощения акцептора энергии [19,20]:…”