Fluorescence Properties of Crown-Containing Molecules

Алфимов, М. В.; Громов, С. П.

doi:10.1007/978-3-642-59903-3_8

Cited by 22 publications

(5 citation statements)

References 47 publications

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“…They have studied selectively bridged ionic styryl dyes and found that twisting over single bonds is an effective route of the relaxation of the electronically excited singlet states of these dyes. This is in agreement with the fact that an increase in viscosity of microenvironment of the styryl dye (for example, as a result of decreasing temperature) leads to an enhancement of fluorescence . Embedding the pyridine ring of dye 1 in the cavity of CB[7] leads to a significant restriction on the intramolecular motion of dye 1 and, therefore, to decreasing nonradiative process in favor of fluorescence that is confirmed by experiment.…”

Section: Resultssupporting

confidence: 82%

The 1:1 Host−Guest Complexation between Cucurbit[7]uril and Styryl Dye

et al. 2011

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The photophysical properties of aqueous solution of styryl dye, 4-[(E)-2-(3,4-dimethoxyphenyl)ethenyl]-1-ethylpyridinium perchlorate (dye 1), in the presence of cucurbit[7]uril (CB[7]) was studied by means of fluorescence spectroscopy methods. The production of 1:1 host-guest complexes in the range of CB[7] concentrations up to 16 μM with K = 1.0 × 10(6) M(-1) has been observed, which corresponds to appearance of the isosbestic point at 396 nm in the absorption spectra and a 5-fold increase in fluorescence intensity. The decay of fluorescence was found to fit to double-exponential functions in all cases; the calculated average fluorescence lifetime increases from 145 to 352 ps upon the addition of CB[7]. Rotational relaxation times of dye 1 solutions 119 ± 14 ps without CB[7] and 277 ± 35 ps in the presence of CB[7] have been determined by anisotropy fluorescence method. The comparison of the results of quantum-chemical calculations and experimental data confirms that in the host cavity dye 1 rotates as a whole with CB[7].

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Section: Resultssupporting

confidence: 82%

The 1:1 Host−Guest Complexation between Cucurbit[7]uril and Styryl Dye

et al. 2011

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“…The influence of heavy cations on these films was studied using 10 −3 , 10 −4 , 10 −5 and 10 −6 M Hg(ClO 4 ) 2 or AgClO 4 aqueous solutions. The spectra of the dye-polymer films in all cases showed a strong band with an absorption maximum at 400–450 nm, which was assigned to the dye trans -form according to published data [ 3 , 31 , 32 , 33 , 34 ] on the pure dye in some organic solvents. The pronounced shoulder at 320–350 nm was assigned to the dye cis -form according to our preliminary studies [ 3 ].…”

Section: Polymer Films For Detection Of Some Heavy Metal Cationssupporting

confidence: 53%

Membrane and Films Based on Novel Crown-Containing Dyes as Promising Chemosensoring Materials

2010

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This paper discusses several works on supramolecular systems such as monolayer and multilayer, polymer films of various crown-containing dyes, surface-active monomers and polymers. Design, production and investigation of the membrane nanostructures based on crown ethers is a rapidly developing field at the “junction” of materials sciences and nanotechnology. These nanostructures can serve as convenient models for studying the self-organization and molecular recognition processes at interfaces that are typical for biomembranes. Based on the results obtained for such structures by absorption and fluorescence spectroscopy, atomic force and Brewster-angle microscopy, surface pressure and surface potential isotherm measurements, the possibility of developing micro- and nanomaterials possessing a set of specified properties (including chemosensor, photochromic and photorefractive materials) is demonstrated.

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“…Cyanine dyes exhibiting photoswitching properties are central to a vigorously developing field of research. 1,2 Crown ether substituted dyes that absorb light in the visible region of the spectrum and bind metal cations selectively, [3][4][5][6][7] have been used, for example, as reagents for calorimetric or fluorimetric metal cation determinations, as components of photoswitchable molecular devices, 8,9 as photosensitizers in photographic chemistry, 10 and as photoelectric materials. 11 Photoisomerization and complexation-induced photochromic responses of such cyanine and merocyanine dyes provide additional dimensions that may lead to advantageous applications in materials science.…”

Section: Introductionmentioning

confidence: 99%

Thiacrown Ether Substituted Styryl Dyes: Synthesis, Complex Formation and Multiphotochromic Properties

Федорова¹,

Fedorov²,

Ведерников³

et al. 2002

J. Phys. Chem. A

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Syntheses of two series of new styryl dyes incorporating thiacrown ether moieties (CSDs 3a-e, 4a-e) are described. 1 H NMR and UV-vis measurements show that these compounds exhibit a strong preference for formation of complexes with heavy metal ions. Polarographic measurements allow conversion of relative complex formation stability constants, determined spectrophotometrically, into absolute values. The photochromic properties of the CSDs are based on reversible trans-cis isomerization and [2+2]-photocycloaddition. The influences of the terminal group of the N-substituent and of the size and composition of the crown ether cavity on metal cation complexation selectivity and on photochromism are evaluated.

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Fluorescence Properties of Crown-Containing Molecules

Cited by 22 publications

References 47 publications

The 1:1 Host−Guest Complexation between Cucurbit[7]uril and Styryl Dye

The 1:1 Host−Guest Complexation between Cucurbit[7]uril and Styryl Dye

Membrane and Films Based on Novel Crown-Containing Dyes as Promising Chemosensoring Materials

Thiacrown Ether Substituted Styryl Dyes: Synthesis, Complex Formation and Multiphotochromic Properties

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