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The fluorescence properties of cationic rhodamine B in the gas phase

Paper ID Volume ID Publish Year Pages File Format Full-Text
28769 44090 2011 6 PDF Available
Title
The fluorescence properties of cationic rhodamine B in the gas phase
Abstract

Studying the photophysical properties of molecules in the gasphase can be advantageous, because it reduces the complexity of the system examined by eliminating effects due to theinteractions between the molecule of interest and other species present in the local environment, including those with the solvent itself. Here, we report on theintrinsic properties of gaseous protonated rhodamine B (RBH+), a well-known xanthene-based dye. Protonated rhodamine B was transferred into the gas phase using electrospray ionization (ESI) and isolated in a quadrupole ion trap (QIT) mass spectrometer, which has been modified to enable laser-induced fluorescence spectroscopy of trapped ions. The gas-phase fluorescence excitation and emission spectra of RBH+show maxima (λex (max) = 531 nm and λem (max) = 542 nm, respectively)that lie at higher energy than those of RBH+ in solution. The fluorescence lifetime of gaseous RBH+ is 5.97 ±  0.12 ns, which is significantly longer than that of solution-phase rhodamine B. Gaseous rhodamine B is signficiantly brighter than monoethylamino rhodamines such as gaseous rhodamine 6G. Knowledge of the intrinsic photophysical properties of chromophores, such as those presented here for rhodamine B, will enable a better understanding of how the local environment of the chromophore modulates its properties.

► Gaseous protonated rhodamine B (RBH+) isolated using ESI mass spectrometry. ► Intrinsic fluorescence properties of mass-selected RBH+measured. ► Fluorescence excitation and emission spectra and lifetimes compared with solution. ► RBH+ is ∼2 times as bright as gaseous rhodamine G.

Keywords
Rhodamine B; Quadrupole ion trap mass spectrometry; Gaseous ion fluorescence; Laser-induced fluorescence; Fluorescence lifetime; Xanthene dyes
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 220, Issues 2–3, 20 May 2011, Pages 173–178
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us