ArticleJournal of fluorescence2017
Coumarin-Rhodamine Hybrids-Novel Probes for the Optical Measurement of Viscosity and Polarity.
Article in Journal of fluorescence, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Polarity-based fluorescence probes: properties and applications.RSC medicinal chemistry · 2021Review
- A Xanthene Dye-based Sensor for Viscosity and Cell Imaging.Journal of fluorescence · 2021Article
- A Theoretical and Experimental Study on the Potential Luminescent and Biological Activities of Diaminodicyanoquinodimethane Derivatives.International journal of molecular sciences · 2021Article
- Ready Access to Molecular Rotors Based on Boron Dipyrromethene Dyes-Coumarin Dyads Featuring Broadband Absorption.Molecules (Basel, Switzerland) · 2020Article
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Authors and funding
7 authors.
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No grant is acknowledged in the PubMed record.
Abstract
A comprehensive systematic study of absorption and fluorescence properties in solvents of varying viscosity and polarity of three novel and red-emitting coumarin-rhodamine hybrid derivatives with differences in the rigidity of their substituents is presented. This includes ethanol-polyethylene glycol, toluene-polyethylene glycol, and toluene-paraffin mixtures. Moreover, protonation-induced effects on the spectroscopic properties are studied. A viscosity-induced emission enhancement was observed for all coumarin-rhodamine hybrid derivatives. MCR2 bearing a julolidine donor showed the expected low sensitivity to viscosity whereas MCR3 with its freely rotatable diphenylamino substituent revealed a particularly pronounced sensitivity to this parameter. Moreover, MCR2 shows an enhancement in emission in the open, i.e., protonated form in conjunction with a largely Stokes shift fluorescence in the deep red spectral region. This enables the application of these dyes as viscosity sensors and as far red emitting pH-sensitive probes.
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Registered trials
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