Effect of Silver Nanoparticles on Singlet–Singlet Energy Transfer Dynamics of Luminophores in Thin Films of Polyvinyl Alcohol

Bryukhanov, V. V.; Tsibul’nikova, A. V.; Самусев, И. Г.; Slezhkin, V. A.

doi:10.1007/s10812-014-9971-0

Cited by 5 publications

(3 citation statements)

References 9 publications

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“…Each next pulse packet of the laser was focused on onto a new area of the plate. We have not applied any stabilizer of a colloidal solution of gold nanoparticles; however, its stability was a rather prolonged [19]. Absorption spectra were registered on a Shimadzu UV-2600 double-beam spectrophotometer in the range λ = 300-700 nm.…”

Section: Methodsmentioning

confidence: 99%

“…We will not present here corresponding wave functions , since their meaning is evident, and coefficients of admixtures of the charge-transfer state in them are considerably greater than in (18). We only note that the orbital symmetry and nature of states (11) and (13) are similar; however, the coefficient of the admixture of the charge-transfer state in state (13) (an analog of β in formulas (18)- (19)) is higher than in state (11), because of a smaller difference between the energies in the denominator. This leads to the appearance of the spin-orbit interaction between states (12) and (11), because the admixtures of the charge-transfer state in them have different orbital nature.…”

Section: Analysis Of Electronic Mechanisms Of Singlet-triplet Annihilmentioning

confidence: 99%

“…As a result of perturbation by intermolecular interaction (19), wave function (9) is deformed and acquires an admixture (18), whereas the wave functions of triplets (11) and (16) acquire admixtures of the charge-transfer state of the type of . Since the spin-orbit interaction between these admixtures of the charge-transfer state is strong, a spin-orbit coupling of states (9), (18) and states of triplet (11), (16) arises upon taking into account the intermolecular interaction.…”

Section: Analysis Of Electronic Mechanisms Of Singlet-triplet Annihilmentioning

confidence: 99%

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The effect of gold nanoparticles on exchange processes in collision complexes of triplet and singlet oxygen molecules with excited eosin molecules

et al. 2015

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We have studied exchange processes in contact complexes of triplet eosin molecules with oxygen molecules in the triplet and singlet ( 1 Δ g ) states in thin polyvinylbutyral films in the presence of gold nanoparticles. Upon resonant excitation of surface plasmons in gold nanoparticles into the absorption band of eosin molecules-singlet oxygen sensitizers-we have obtained an increase in the intensity of the delayed fluorescence and an increase in the lifetime of the dye with simultaneous quenching of the luminescence of singlet oxygen. The kinetics of the delayed fluorescence of the dye as a result of singlet-triplet annihilation of triplet eosin molecules with singlet oxygen molecules has been investigated. To compare theoretical and experimental data, we have numerically simulated energy transfer processes. Rate constants of energy transfer and of singlet-triplet annihilation, as well as quenching constants of triplet states of the dye by molecular oxygen, have been calculated. Luminescence quantum yield 1 Δ g of polyvinylbutyral has been estimated. We have analyzed quantum-chemically electronic mechanisms of singlet-triplet annihilation of oxygen and eosin.

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Section: Methodsmentioning

confidence: 99%

Section: Analysis Of Electronic Mechanisms Of Singlet-triplet Annihilmentioning

confidence: 99%