Azacyanines of the Pyrrolopyrrole Series |
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| Authors: | Timo Marks Prof?Dr Ewald Daltrozzo Prof?Dr Andreas Zumbusch |
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| Affiliation: | Fachbereich Chemie, Universit?t Konstanz, 78457 Konstanz (Germany), Fax: (+49)?7531‐88‐3139 |
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| Abstract: | The reaction of POCl3‐activated, readily soluble diketopyrrolopyrrole (DPP) with 2‐aminoheteroaromatics to yield 1:1 and 1:2 hydrogen chelates is described. Complexation of these hydrogen chelates with boron reagents results in thermally and photochemically stable fluorescent dyes (PP–azacyanines). The 1:2 complexes in particular absorb at long wavelengths and are brightly fluorescing. The rich photophysics of the new compounds are presented. Both the pronounced vibrational fine structure of the S0→S1 transitions and the observed fluorescence phenomena allow detailed conclusions to be made on the correlation between molecular structure and optical properties. |
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| Keywords: | absorption chromophores dyes/pigments fluorescence photophysics |
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