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合成了两个新的有机晶体:反式-4-[4'-(N-羟乙基-N-甲基胺基)苯乙烯基]-N-甲基吡啶对甲苯磺酸盐trans-4-[4'-(N-hydroxyethyl-N-methylamino)styryl]-N-methylpyridiniumtoluene-p-sulfonate(简称HMASPS)和反式-4-[4'-(N-羟乙基-N-乙基胺基)苯乙烯基]-N-甲基吡啶对甲苯磺酸盐trans-4-[4'-(N-hydroxyethyl-N-ethylamino)styryl]-N-methylpyridiniumtoluene-p-sulfonate(简称HEASPS)。用X射线衍射方法对这两个单晶进行了结构测定。测试了它们频率上转换荧光及激光性质。在1064nm的ps脉冲激光的激发下,HMASPS和HEASPS在溶液中均发出~625nm的上转荧光和激光,并且有可观的激光效率。 相似文献
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Palanisamy Shanmugasundaram Periyasamy Murugan Vayalakkavoor T. Ramakrishnan Narayanan Srividya Perumal Ramamurthy 《Heteroatom Chemistry》1996,7(1):17-22
Synthesis of 9-alkyl, 10-alkyl, 9,10-dialkyl, and 10-aryl-3,4,6,7,9,10-hexahydro-1,8(2H,5H)acridinedione (2a–r) are described as a new class of laser dyes. Reactions of diamines with methylene bis(cyclohexane-1,3-dione) yielded the respective bisacridinediones (3a–e). These dyes lase around 478–494 nm and are compared with the standard dye coumarin-102. © 1996 John Wiley & Sons, Inc. 相似文献
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A new series of heterocyclic disperse dyes were prepared by diazotization of some 2-aminothiazole derivatives and subsequent
coupling with indole compounds. The dyes were characterized by UV-Vis, FT-IR, 1H NMR, and mass spectra (LC-MS). Solvent effects on their visible absorption spectra were estimated. The color of the dyes
is discussed with respect to the substituent therein. The effects of acids and bases on the visible absorption maxima of the
dyes are also reported. Replacement of methyl group in the 4-position of the thiazole ring by phenyl group leads to red shift
of the absorption maximum due to π-electron-donating properties of the phenyl group, while weak electron-withdrawing chlorine
or bromine atom in the para-position of the phenyl group in the 2-amino-4-phenylthiazole fragment induce a small blue shift relative to 2-amino-4-phenylthiazole
derivatives. Introduction of an electron-withdrawing 4-nitrophenylsulfonyl group into the thiazole ring produces bathochromic
shift of the absorption maximum in all solvents.
Published in Russian in Zhurnal Organicheskoi Khimii, 2008, Vol. 44, No. 4, pp. 592–599.
The text was submitted by the authors in English. 相似文献
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Ming Wei Hu Xiaojie Zhang Zhizhong Chang Shunzhou Chen Risheng Tian Baozhu Zhang Jinlong 《Research on Chemical Intermediates》2020,46(3):1991-2002
Research on Chemical Intermediates - In the present work, we synthesized two seminaphthorhodafluor red laser dyes SNARF-X1 and SNARF-X2 and investigated their photo-physical properties in different... 相似文献
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Synthesis, photophysical properties, and laser behavior of 3-amino and 3-acetamido BODIPY dyes 总被引:1,自引:0,他引:1
Liras M Prieto JB Pintado-Sierra M Arbeloa FL García-Moreno I Costela A Infantes L Sastre R Amat-Guerri F 《Organic letters》2007,9(21):4183-4186
The asymmetrically substituted BODIPY dyes 9a and 9b have been synthesized through a key redox step involving the alpha-nitroso derivative of the starting pyrrol. Both dyes emit fluorescence with quantum yields of ca. 0.7, but only 8b behaves as a good laser dye, with an efficiency of 48% in ethanol solution. 相似文献
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A. I. Vedernikov L. G. Kuz’mina S. K. Sazonov N. A. Lobova P. S. Loginov A. V. Churakov Yu. A. Strelenko J. A. K. Howard M. V. Alfimov S. P. Gromov 《Russian Chemical Bulletin》2007,56(9):1860-1883
New styryl dyes of the pyridine and benzothiazole series were synthesized with the aim of investigating the solid-state [2+2]
autophotocycloaddition (PCA) reaction. The 1H NMR spectroscopy showed that for most of the compounds under study, the visible light irradiation of thin polycrystalline
films of the dyes affords cyclobutane derivatives. The rate of the photoreaction depends on the structure of the dye and is
higher for compounds, which contain a short N-substituent in the heterocyclic moiety and have strong absorption in the visible region. Dyes bearing electron-releasing
substituents in the benzene ring undergo the stereospecific PCA in the syn-head-to-tail dimeric pair to give the only rctt isomer of cyclobutane derivatives. Electron-withdrawing and bulky substituents in the benzene fragment of styryl dyes extend
the range of the mutual orientations of the molecules in the dimeric pairs, resulting in the formation of two or even four
isomeric cyclobutanes in the PCA reactions. The structures of some dyes were established by X-ray diffraction. In the overwhelming
majority of the structures, one of two packing modes, either syn-head-to-tail or syn-head-to-head, with extensive stacking interactions is observed. A rare example of the anti-head-to-head stacking mode was found for the dicationic dye containing the bulky N+(Et)Me2 substituent in the benzene ring. The syn-head-to-tail and anti-head-to-head stacking modes can facilitate the PCA reaction due to the close spatial proximity of the ethylenic bonds and
their parallel orientation in the dimeric pairs of the dye molecules.
Dedicated to Academician G. A. Abakumov on the occasion of his 70th birthday.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 9, pp. 1797–1819, September, 2007. 相似文献
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Israel Scheinfeld James C. Parham George Bosworth Brown 《Journal of heterocyclic chemistry》1982,19(5):1231-1233
N-Oxidation of 2-amino-6-chloropurine to the 3-oxide provided a convenient intermediate for the synthesis of 2-amino-6-substituted purine 3-oxides, including the previously unavailable 2,6-diaminopurine 3-oxide. Thiation of the 6-halogen was accompanied by reduction of the N-oxide. The properties of the 1- and 3-oxides of 2,6-diaminopurine are compared. 相似文献
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Palanisamy Shanmugasundaram K. Joseph Prabahar Vayalakkavoor T. Ramakrishnan 《Journal of heterocyclic chemistry》1993,30(4):1003-1007
Synthesis of 10-aryl-3,4,6,7,9,10-hexahydro-1,8(2H,5H)-acridinedione as a new class of laser dyes is reported. These dyes lase around 475–495 nm and are compared to the standard dye coumarin 102. 相似文献
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Dmytro A. Yushchenko Mykhailo D. Bilokin’ Guy Duportail Vasyl G. Pivovarenko 《Tetrahedron letters》2006,47(6):905-908
A series of 2-aryl-3-hydroxyquinolones (3HQs) with different electron donating aryl substituents at the position 2 were synthesized. Their absorption and fluorescence properties were studied in solvents of medium and high polarity. Almost all the synthesized 3HQs display dual fluorescence in the tested solvents, in line with an excited state intramolecular proton transfer reaction. For N-methyl substituted compounds, the intensity ratio of the two emission bands was found to be exquisitely sensitive to solvent polarity, with a two orders of magnitude change from toluene to dimethylsulfoxide. Consequently, these compounds appear as prospective polarity fluorescent labels for proteins and nucleic acids. 相似文献
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E. V. Buravlev I. Yu. Chukicheva I. A. Dvornikova A. V. Churakov . V. Kutchin 《Russian Journal of Organic Chemistry》2012,48(7):938-942
New 2,6-diisobornylphenol derivatives having formyl, hydroxymethyl, and carboxy groups in the para position with respect to the hydroxy group were synthesized. 4-Hydroxy-3,5-diisobornylbenzoic acid was obtained in a moderate yield through intermediate ortho ester and methyl ester. 相似文献
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Yu Fei SONG 《中国化学快报》2000,11(10):879-882
In previous paper, we had reported the synthesis of three conjugates of the cytotoxicity agents: 2,6-Dimethoxyhydroquinone-3-mercaptoacetic acid (DMQ-MA)1, which is a derivative of 2,6-dimethoxy-p-benzoquinone (DMQ). DMQ is a naturally fermented product of wheat germ and was found to have a wide spectrum of cytotoxicity against various tumor cell lines under the synergistic activation of L-ascorbic acid2-5 . Owing to the very low aqueous solubility of DMQ, we prepared derivatives of the … 相似文献