NDLI: Synthesis and photonics of ketocyanine dyes, 2,6-bis(4-dimethylaminoalka-1,3-dienyl)-4H-pyran-4-ones and ethoxytridecamethine salts based on them

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Investigation of the state of palladium in the potassium palladium-11-tungstosilicate/alumina system by diffuse-reflectance IR spectroscopy

Isomerization ofn-butane on the SO$_{4}$/ZrO$_{2}$ catalyst promoted by IV Period metals

Effect of the nature of zeolite and modifying additives on the activity of zeolite-containing catalysts inn-butane isomerization

X-ray diffraction analysis and spectral studies of new derivatives of pyrazol-5-one

Spectral and fluorescent properties of cross-conjugated polyene ketones with terminalN-methylpyrrole residues

Chemo- and regioselective nitration of geranylacetone by NaNO$_{2}$/AcOH. Synthesis of 6,10-dimethyl-9-methyleneundec-5E-en-2-one

Iodination of nitroarenes by a superactive reagent based on iodine chloride

Syntheis of amino-substituted 1,3-bis(tert-butyl-NNO-azoxy)benzenes : 1. 4-Amino and 4,6-diamino derivatives

Peri-Naphthylenediamines : Unexpected formation of naphtho[1,8-c,d]pyran derivatives in the reaction of 1,8-bis(dimethylamino)naphthalene with trifluoracetic anhydride. A new type of double naphthalene “proton sponges”

Structures of products of the reaction of dimethylsulfonium phenacylide with benzylidenecyanoacetamide

Formation and thermal decomposition of adducts of phthalimidonitrene with spiro(1-pyrazolinecyclopropanes)

Reactions of 3,3-dialkyl-2,3-dihydro-6-trifluoromethyl-4-pyrones with hydroxylamine. Synthesis and structures of 5-(1,1-dialkyl-2-hydroxyethyl)-5-hydroxy-3-trifluoromethyl-Δ$^{2}$-isoxazolines

Synthesis and photonics of ketocyanine dyes, 2,6-bis(4-dimethylaminoalka-1,3-dienyl)-4H-pyran-4-ones and ethoxytridecamethine salts based on them

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Light-induced synthesis of 3,7-disubstituted bisisothiazolo[4,5-b:4′,5′-e]pyrazines from 3-substituted 4-dibromoamino-5-haloisothiazoles

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Acylpyruvamides and acylpyruvoylhydrazines : 7. Reactions of aroylpyruvamides with hydrazine and phenylhydrazine

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Triterpenoids fromAbies species : 24. Photochemical fragmentation of trinor-mariesiane hydroxy ketone

Influence ofE/Z isomerism of aldoximes on the direction of their alkylation with oxirane

Synthesis of 2-substituted 6,8-dinitro[1,2,4]triazolo[1,5-a]pyridines and the formation of the related zwitterionic σ-adducts

Lithium-sodium synergism in alkylation of toluene and naphthalene with ethene under the action of the ArH/alkali metal systems in THF

Simple synthesis of 1,4,8-triazabicyclo[5.3.0]dec-4-ene derivatives from β-amino-β-polyfluoroalkylvinyl ketones and diethylenetriamine

Russian Chemical Bulletin : Volume 48, Issue 6, June 1999

Russian Chemical Bulletin : Volume 48, Issue 5, May 1999

Russian Chemical Bulletin : Volume 48, Issue 4, April 1999

Russian Chemical Bulletin : Volume 48, Issue 3, March 1999

Russian Chemical Bulletin : Volume 48, Issue 2, February 1999

Russian Chemical Bulletin : Volume 48, Issue 1, January 1999

Russian Chemical Bulletin : Volume 47

Russian Chemical Bulletin : Volume 46

Synthesis and photonics of ketocyanine dyes, 2,6-bis(4-dimethylaminoalka-1,3-dienyl)-4H-pyran-4-ones and ethoxytridecamethine salts based on them

Content Provider	Springer Nature Link
Author	Krasnaya, Zh. A. Smirva, Yu. V. Tatikolov, A. S. Kuz'min, V. A.
Copyright Year	1999
Abstract	The reactions of β-dimethylaminoacrolein aminals with 2,6-dimethyl-γ-pyrone lead to 2,6-bis(4-dimethylaminoalka-1,3-dienyl)-4H-pyran-4-ones, whose alkylation affords ethoxytridecamethine salts. The spectral and fluorescence properties of the synthesized compounds were studied. Their absorption spectra are unusual; along with the long-wavelength band in the visible spectral region, they contain a much more intense short-wavelength band in the near UV region. This pattern of the absorption spectra is explained in terms of the model of chromophore interaction, assuming an acute angle between the chromophore “halves” of the polyene chain of the dye molecule. The central pyran ring in the ethoxytridecamethine salts can hamper conjugation in the polymethine chain. Thermochromism of 2,6-bis(4-dimethylaminoalka-1,3-dienyl)-4H-pyran-4-ones (the long-wavelength shift of the absorption spectra on cooling of the solutions) is observed; only the long-wavelength absorption band undergoes a pronounced thermochromic shift. The introduction of methyl or phenyl substituents into the polyene chains of substituted 4H-pyranones decreases the fluorescence quantum yield.
Starting Page	1329
Ending Page	1334
Page Count	6
File Format	PDF
ISSN	10665285
Journal	Russian Chemical Bulletin
Volume Number	48
Issue Number	7
e-ISSN	15739171
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	1999-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	2,6-dimethyl-γ-pyrone aminals of β-dimethylaminoacroleins 2,6-bis(4-dimethylaminoalka-1,3-dienyl)-4H-pyranones polymethine salts, absorption and fluorescence spectra thermochromism chromophore interaction Chemistry/Food Science Inorganic Chemistry Organic Chemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry

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Synthesis of 2,6-bis-polyfluoroalkyl-4H-pyran-4-ones

Synthesis of 2,6-bis-polyfluoroalkyl-4H-pyran-4-ones

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Synthesis of 2,6-Bis(1H-indole-6-yl)-4H-pyran-4-ones via Leimgruber—Batcho Indole Synthesis.

Crystal structure of 5-(2,6-dimethyl-4H-pyran-4-ylidene)-1,3-dimethylpyrimidine- 2,4,6(1H,3H,5H)-trione, C13H14N2O4

Unusual aluminum chloride-assisted conversion of isopropenyl acetate into 3-acetyl- and 3,5-diacetyl-2,6-dimethyl- 4H-pyran-4-ones

Chemistry of Pyrones, Part 5: New Crown Ether and Podand Derivatives of 3,5-Bis(bromomethyl)-2,6-diphenyl-4H-pyran-4-one

Condensation of amino derivatives of benzimidazol-2-ones and imidazo[4,5-b]pyridin-2-ones with 2,6-dimethyl-γ-pyrone in acetic acid

An Efficient Synthesis of 2,6-Disubstituted 2,3-Dihydro-4H-pyran-4-ones via Sonogashira Coupling of p-Toluenethiol Esters

Synthesis and photonics of ketocyanine dyes, 2,6-bis(4-dimethylaminoalka-1,3-dienyl)-4H-pyran-4-ones and ethoxytridecamethine salts based on them

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