The quenching of the long-lived phosphorescence of naphthalene–β-cyclodextrin–cyclohexane ternary complexes localized in the matrix of β-cyclodextrin–cyclohexane binary complexes in an aqueous suspension of crystal hydrates and in a powder formed after drying of the crystal hydrates has been studied. In the suspension, the phosphorescence kinetics is monoexponential, and dynamic quenching takes place; the bimolecular quenching constant is kq = 0.95 × 105 s−1 M−1. In the powder, the phosphorescence kinetics is not monoexponential; this fact is apparently attributed to the heterogeneous structure of the environment of the naphthalene molecules. The heterogeneity of the environment is evidenced by the presence of a distribution of nonradiative process rate constants and a decrease in the accessibility of naphthalene molecules for interaction with oxygen.
ЦИТАТА
Oxygen Quenching of the Phosphorescence of Naphthalene–β-Cyclodextrin–Cyclohexane Ternary Complexes / D.E. Makhrov, D.S. Ionov, I.V. Ionova, M.V. Alfimov // High Energy Chemistry. – 2025. – Т. 59. – № 1. – P. 15-21
Long-lived delayed fluorescence of dispersions of microcrystals of naphthalene–β-cyclodextrin–cyclohexane ternary complexes has been studied. It has been established that the delayed fluorescence is d...
Spontaneous and photoinduced protonation of 4-(2-naphthyl)pyridine (1) in solutions and in complexes with β-cyclodextrin (β-CD) and 2-hydroxypropyl-β-cyclodextrin (HP-β-CD) was studied using the absor...
The spontaneous and photoinduced protonation of 4-(2-naphthyl)pyridine (1) in solutions and in complexes with β-cyclodextrin (β-CD) and 2-hydroxypropyl-β-cyclodextrin (HP-β-CD) were studied by absorpt...
