Rhodamines in the gas phase: cations, neutrals, anions, and adducts with metal cations

Literature Information

Publication Date 2010-08-10
DOI 10.1039/C000807A
Impact Factor 3.676
Authors

Konstantin Chingin, Roman M. Balabin, Konstantin Barylyuk, Huanwen Chen, Vladimir Frankevich, Renato Zenobi


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Abstract

Optical spectroscopy of biological molecules in the gas phase has recently gained considerable attention, being able to provide complementary structural information in the absence of native matrix. Biomolecules can change their properties when brought into the gas phase, and so can chromophores associated with them. Understanding the photophysics of chromophore labels is central for the correct interpretation of experimental data. In this report, the structure and the optical properties of Rhodamine 19 (R19) in the gas phase were examined by a combination of Fourier-transform ion cyclotron resonance mass spectrometry and visible-light laser spectroscopy. While R19 in solution is found either in neutral (R19n) or protonated (R19+H+) forms, other structures can be generated in the gas phase, such as anions (R19−H−) and adducts with metal cations (R19+M+). Experimental evidence for the lactone structure of neutral gas-phase R19 is presented for the first time. The different properties of gas-phase compared to solution-phase R19 are discussed in view of structural analysis of labeled gas-phase biological molecules by optical spectroscopy.

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Source Journal

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
Articles per Year: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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