Fluorescence quantum yields of perylene 3,4,9,10-tetracarboxylic acid-bis-n,n’ aryl(alkyl)diimides

The synthesized perylenes 3,4,9,10-tetracarboxylic acid N,N'-ethyl, phenyl, ?-anisyl, ?-naphthyl and acetyl diimides have shown great variations in absorption and emission spectra. The variation in molar extinction coefficients and fluorescence quantum yields have indicated that steric and electronic effects, caused by N-substitution, alters emission characteristics of perylene diimides significandy. © 1994, Taylor & Francis Group, LLC. All rights reserved

Nmr, absorption and fluorescence parameters of azlactones

Absorption and fluorescence wavelenghts for a series of azlactones have been measured from acetonitrile solutions that had no pre-light exposure. Fluorescence quantum yields, Qp are found to be in general less than 0.01, excluding the the derivatives with naphthyl and p-dimethylaminophenyl substituents. Previously reported values did not not fit to our results. © 1994, Taylor & Francis Group, LLC. All rights reserved

High rates of fluorescence quenching between perylene dodecyldiimide and certain ?-electron donors

Perylene bis-n-dodecyl diimide is found to quench fluorescenc emissions of naphthalene, phenanthrene and dihydrocarbazolocarbazole molecules at rates of 4.4×1011 , 2.8×1012 and 2.5×104 M-1 sec-1 , in respective order of aromaticity. These unusulally high rates of fluorecence quenchings are attributed to Perrin model static quenching and presence of electron transfer through singlet excited state of perylene diimide. Calculated free energy of electron transfer, ? G ET=-120.5 kJ/mol, between perylene diimide and dihydrocarbazolocarbazole is taken as evidence for observation of high fluorescence quenching rate for carbazolocarbazole molecule

Synthesis and properties of a new photostable soluble perylene dye :N,N'-di-(1-dehydroabietyl) perylene-3,4,9,10-bis(dicarboximide)

N,N' - Di-(-1-Dehydroabietyl) perylene -3,4,9,10-bis(dicarboximide) is prepared in 95 °/o yield by the condensation of perylene 3,4,9,10-tetracarboxylic dianhydride with dehydroabietyl amine Thermal and photostable bright red-orange dye is measured to have a fluorescence quantum yield of unity, Qf=1, in chloroform solutions. Solubility of the dye is 1 8 g/L in chloroform. The diimide is an ideal reference probe for fluorescence quantum yield measurements in 500-650 nm region and also very interesting dye for chemiluminescent light devices

High rates of fluorescence quenching between perylene dodecyldiimide and certain pi-electron donors

WOS: 000072327400019Perylene bis-n-dodecyl diimide is found to quench fluorescenc emissions of naphthalene, phenanthrene and dihydrocarbazolocarbazole molecules at rates of 4.4 x 10(11), 2.8 x 10(12) and 2.5 x 10(4) M-1 sec(-1), in respective order of aromaticity. These unusulally high rates of fluorecence quenchings are attributed to Perrin model static quenching and presence of electron transfer through singlet excited state of perylene diimide. Calculated free energy of electron transfer, Delta G(ET)=-120.5 kJ/mol, between perylene diimide and dihydro carbazolocarbazole is taken as evidence for observation of high fluorescence quenching rate for carbazolocarbazole molecule

Synthesis and properties of a new photostable soluble perylene dye: N,N '-Di-(1-dehydroabietyl) perylene-3,4,9,10-bis(dicarboximide)

WOS: 000077530000004N,N'- Di-(-1-Dehydroabietyl) perylene-3,4,9,10-bis(dicarboximide) is prepared in 95 % yield by the condensation of perylene 3,4,9,10-tetracarboxylic dianhydride with dehydroabietyl amine. Thermal and photostable bright red-orange dye is measured to have a fluorescence quantum yield of unity, Q(f) = 1, in chloroform solutions. Solubility of the dye is 1.8 g/L in chloroform. The diimide is an ideal reference probe for fluorescence quantum yield measurements in 500-650 nm region and also very interesting dye for chemiluminescent light devices

Nmr, Absorption and Fluorescence Parameters of Azlactones

WOS: A1994PM82000003Absorption and fluorescence wavelenghts for a series of azlactones have been measured from acetonitrile solutions that had no pre-light exposure. Fluorescence quantum yields, Q(F), are found to be in general less than 0.01, excluding the the derivatives with naphthyl and p-dimethylaminophenyl substituents. Previously reported Q(F) values did not fit to our results