5 years ago

Tuning the Sensitivity of Fluorescent Porphyrin Dimers to Viscosity and Temperature

Tuning the Sensitivity of Fluorescent Porphyrin Dimers to Viscosity and Temperature
Maryam Qurashi, Aurimas Vyšniauskas, Milan Balaz, Dong Ding, Marina K. Kuimova, Harry L. Anderson, Igor Boczarow
Conjugated porphyrin dimers have emerged as versatile viscosity-sensitive fluorophores that are suitable for quantitative measurements of microscopic viscosity by ratiometric and fluorescence lifetime-based methods, in a concentration-independent manner. Here, we investigate the effect of extended conjugation in a porphyrin-dimer structure on their ability to sense viscosity and temperature. We show that the sensitivity of the fluorescence lifetime to temperature is a unique property of only a few porphyrin dimers. Red, fluorescent and viscosity-sensitive: A series of viscosity-sensitive fluorophores (“molecular rotors”) based on a porphyrin dimer structure were tested for sensitivity to viscosity and temperature. We demonstrate how both viscosity and temperature can be measured by tuning the structure of the dimers.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/chem.201700740

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