Photochemistry of anionic polymethine dyes

1993 ◽  
Vol 42 (4) ◽  
pp. 677-682 ◽  
Author(s):  
A. S. Tatikolov ◽  
Kh. S. Dzhulibekov ◽  
Zh. A. Krasnaya ◽  
A. A. Ishchenko ◽  
V. A. Kuz'min
Keyword(s):  
Polymethine Dyes

Influence of CdSe Nanoparticles on Stability of Polymethine Dyes in Water

2014 ◽  
Vol 59 (3) ◽  
pp. 326-330 ◽  
Author(s):  
S.Yu. Vyshnevskyy ◽  
◽  
I.M. Dmitruk ◽  
A.P. Naumenko ◽  
Yu.L. Bricks ◽  
...  
Keyword(s):  
Cdse Nanoparticles ◽  
Polymethine Dyes

A Unified Model for Photophysical and Electro-Optical Properties of Green Fluorescent Proteins

2019 ◽  
Author(s):  
Chi-Yun Lin ◽  
Matthew Romei ◽  
Luke Oltrogge ◽  
Irimpan Mathews ◽  
Steven Boxer
Keyword(s):  
Driving Force ◽  
Fluorescent Protein ◽  
Charge Transfer Band ◽  
Photophysical Properties ◽  
Polymethine Dyes ◽  
Emission Rates ◽  
Unified Framework ◽  
Underlying Factor ◽  
Green Fluorescent ◽  
Protein Environment

Green fluorescent protein (GFPs) have become indispensable imaging and optogenetic tools. Their absorption and emission properties can be optimized for specific applications. Currently, no unified framework exists to comprehensively describe these photophysical properties, namely the absorption maxima, emission maxima, Stokes shifts, vibronic progressions, extinction coefficients, Stark tuning rates, and spontaneous emission rates, especially one that includes the effects of the protein environment. In this work, we study the correlations among these properties from systematically tuned GFP environmental mutants and chromophore variants. Correlation plots reveal monotonic trends, suggesting all these properties are governed by one underlying factor dependent on the chromophore's environment. By treating the anionic GFP chromophore as a mixed-valence compound existing as a superposition of two resonance forms, we argue that this underlying factor is defined as the difference in energy between the two forms, or the driving force, which is tuned by the environment. We then introduce a Marcus-Hush model with the bond length alternation vibrational mode, treating the GFP absorption band as an intervalence charge transfer band. This model explains all the observed strong correlations among photophysical properties; related subtopics are extensively discussed in Supporting Information. Finally, we demonstrate the model's predictive power by utilizing the additivity of the driving force. The model described here elucidates the role of the protein environment in modulating photophysical properties of the chromophore, providing insights and limitations for designing new GFPs with desired phenotypes. We argue this model should also be generally applicable to both biological and non-biological polymethine dyes.<br>

Oxonol dyes

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Heinz Mustroph
Keyword(s):  
Silver Halide ◽  
Medical Diagnostics ◽  
Water Soluble ◽  
Eukaryotic Cells ◽  
Polymethine Dyes ◽  
Technical Application ◽  
Structural Types ◽  
Oxonol Dyes ◽  
Oxygen Atoms

Abstract Oxonol dyes are classified as anionic polymethine dyes, which cover a wide variety of structural types. The name of the class originates from the oxygen atoms which terminate each end of the polymethine chains that form the backbone of their structure. In technically useful dyes, these oxygen atoms tend to be substituents of heterocycles. The main technical application of water soluble oxonol dyes was in silver halide photography as filter dyes and antihalation dyes. Lipophilic oxonol dyes are used in bio-analysis and medical diagnostics to stain cells, bacteria or liposomes for example. Their main bioanalytical usage is in the determination of membrane potentials in eukaryotic cells and prokaryotic bacteria.

scholarly journals Merocyanine dyes

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Heinz Mustroph
Keyword(s):  
Electronic Structure ◽  
Fluorescent Dyes ◽  
Silver Halide ◽  
Equilibrium Structure ◽  
Polymethine Dyes ◽  
Spectral Sensitization ◽  
Technical Application ◽  
Textile Dyeing ◽  
Merocyanine Dyes ◽  
Active Methylene

Abstract Merocyanine dyes belong to the class of neutral polymethine dyes, where one terminal component is typically found in cyanine dyes and the second obtained from an active methylene compound. The different electron acceptor/donator abilities of the two terminal components have a marked impact on the electronic structure of a merocyanine dye and its equilibrium structure and electronic spectra. Their first technical application was spectral sensitization in silver halide photography. Today they have numerous of applications in textile dyeing and as membrane potential sensitive fluorescent dyes.

Polymethine dyes based on pyrroloanthrone

1990 ◽  
Vol 26 (10) ◽  
pp. 1179-1185 ◽  
Author(s):  
Y. L. Briks ◽  
A. D. Kachkovskii ◽  
N. N. Romanov
Keyword(s):  
Polymethine Dyes

Modulation of the Q of a neodymium-glass laser cavity using polymethine dyes

1967 ◽  
Vol 6 (2) ◽  
pp. 173-174
Author(s):  
O. L. Lebedev ◽  
Yu. M. Gryaznov ◽  
A. A. Chastov ◽  
A. V. Kazymov
Keyword(s):  
Laser Cavity ◽  
Polymethine Dyes ◽  
Glass Laser ◽  
Neodymium Glass
Sign in / Sign up

Export Citation Format

Share Document