Quenching of phosphorescence of triple complexes of naphthalene-β-cyclodextrin-cyclohexane with oxygen

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Аннотация

The process of quenching of long-lived phosphorescence of ternary complexes naphthalene-β-cyclodextrin-cyclohexane, localized in the matrix of double complexes β-cyclodextrin-cyclohexane, in aqueous suspension of crystalline hydrates and powder formed by drying of crystalline hydrates has been studied. In the suspension, the phosphorescence kinetics are monoexponential and the quenching is dynamic; the bimolecular quenching constant is equal kq = 0.87 × 105 s–1M–1. In the powder, the phosphorescence kinetics are not monoexponential, which is apparently due to the different surrounding structure of the naphthalene molecules. The inhomogeneity of the environment is expressed in the presence of a distribution of the rate constants of radiation-free processes and a decrease in the availability of naphthalene molecules for interaction with oxygen.

Авторлар туралы

D. Makhrov

NRC Kurchatov Institute; Moscow Institute of Physics and Technology

Email: dmitriy.ionov@gmail.com

Kurchatov complex of crystallography and photonics, Photochemistry Center department

Ресей, Moscow; Dolgoprudny

D. Ionov

NRC Kurchatov Institute

Хат алмасуға жауапты Автор.
Email: dmitriy.ionov@gmail.com

Kurchatov complex of crystallography and photonics, Photochemistry Center department

Ресей, Moscow

I. Ionova

NRC Kurchatov Institute

Email: dmitriy.ionov@gmail.com

Kurchatov complex of crystallography and photonics, Photochemistry Center department

Ресей, Moscow

M. Alfimov

NRC Kurchatov Institute; Moscow Institute of Physics and Technology

Email: dmitriy.ionov@gmail.com

Kurchatov complex of crystallography and photonics, Photochemistry Center department

Ресей, Moscow; Dolgoprudny

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