Paradiz Dominguez, Maximilian; Demirkurt, Beguem; Grzelka, Marion; Bonn, Daniel; Galmiche, Laurent; Audebert, Pierre; Brouwer, Albert M. published the artcile< Fluorescent Liquid Tetrazines>, Application In Synthesis of 104-76-7, the main research area is branched alkoxy tetrazine photophys property rheol viscosity; excited states; fluorescence; inter system crossing; rheology; viscosity.
Tetrazines with branched alkoxy substituents are liquids at ambient temperature that despite the high chromophore d. retain the bright orange fluorescence that is characteristic of this exceptional fluorophore. Here, we study the photophys. properties of a series of alkoxy-tetrazines in solution and as neat liquids We also correlate the size of the alkoxy substituents with the viscosity of the liquids We show using time-resolved spectroscopy that intersystem crossing is an important decay pathway competing with fluorescence, and that its rate is higher for 3,6-dialkoxy derivatives than for 3-chloro-6-alkoxytetrazines, explaining the higher fluorescence quantum yields for the latter. Quantum chem. calculations suggest that the difference in rate is due to the activation energy required to distort the tetrazine core such that the nπ*S1 and the higher-lying ππ*T2 states cross, at which point the spin-orbit coupling exceeding 10 cm-1 allows for efficient intersystem crossing to occur. Femtosecond time-resolved anisotropy studies in solution allow us to measure a pos. relationship between the alkoxy chain lengths and their rotational correlation times, and studies in the neat liquids show a fast decay of the anisotropy consistent with fast exciton migration in the neat liquid films.
Molecules published new progress about Anisotropy. 104-76-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H18O, Application In Synthesis of 104-76-7.
Referemce:
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