An Increase in The Cross-Section of Two-Photon Absorption of Styrene Dye in Supramolecular Complexes with Cucurbituriles

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Two-photon absorption cross sections of aqueous solutions of the styryl dye trans-4-[4-(dimethylamino)styryl]-1-methylpyridinium iodide (DASPI) and its inclusion complexes with cucurbit[n]urils (CB[n] n = 6–8) were measured using fluorescence spectroscopy. A nonmonotonic dependence of the cross-section size on the excitation wavelength and on the cavitand cavity size was found. Compared with a free dye, a sevenfold increase in the two-photon absorption cross section was observed in DASPI inclusion complexes with CB[8] at an excitation wavelength of 980 nm.

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作者简介

N. Petrov

Crystallography and Photonics Federal Research Center of the Russian Academy of Sciences; Moscow Institute of Physics and Technology (National Research University)

Email: ivanovd@photonics.ru
俄罗斯联邦, Moscow; Dolgoprudny

A. Ivanov

Crystallography and Photonics Federal Research Center of the Russian Academy of Sciences; Lomonosov Moscow State University

Email: ivanovd@photonics.ru
俄罗斯联邦, Moscow; Moscow

D. Ivanov

Crystallography and Photonics Federal Research Center of the Russian Academy of Sciences

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Email: ivanovd@photonics.ru
俄罗斯联邦, Moscow

A. Fedotov

Lomonosov Moscow State University

Email: ivanovd@photonics.ru
俄罗斯联邦, Moscow

A. Lanin

Lomonosov Moscow State University

Email: ivanovd@photonics.ru
俄罗斯联邦, Moscow

A. Chebotarev

Lomonosov Moscow State University

Email: ivanovd@photonics.ru
俄罗斯联邦, Moscow

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2. Fig. 1. Structural formulas of the DASPI styrene dye and cucurbit[n]uril

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3. Fig. 2. Brightness of fluorescence excited at 790 nm and 980 nm of aqueous solutions of free DASPI and its complexes with cucurbituriles

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