Ultrafast spectroscopy of biliverdin dimethyl ester in solution: pathways of excited-state depopulation

2020 ◽  
Vol 22 (35) ◽  
pp. 19903-19912
Author(s):  
Yangyi Liu ◽  
Zhuang Chen ◽  
Xueli Wang ◽  
Simin Cao ◽  
Jianhua Xu ◽  
...  
Keyword(s):  
Excited State ◽  
Quantum Yield ◽  
Quantum Efficiency ◽  
Fluorescence Quantum Yield ◽  
Ultrafast Spectroscopy ◽  
Fluorescent Proteins ◽  
Dimethyl Ester ◽  
Bile Pigments ◽  
Enhanced Fluorescence ◽  
Red Fluorescent Proteins

Biliverdin and its dimethyl ester derivatives are bile pigments with very low fluorescence quantum yield in solution, but naturally serve as chromophores in far-red fluorescent proteins with three orders of magnitude enhanced fluorescence quantum efficiency.

UV-Trained and Metal-Enhanced Fluorescence of Biliverdin and Biliverdin Nanoparticles

Nanoscale ◽  
2021 ◽  
Author(s):  
Parinaz Fathi ◽  
Ayman Roslend ◽  
Kritika Mehta ◽  
Parikshit Moitra ◽  
Kai Zhang ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Biomedical Imaging ◽  
Enhanced Fluorescence ◽  
Metal Enhanced Fluorescence

Increasing the fluorescence quantum yield of fluorophores is of great interest for in vitro and in vivo biomedical imaging applications. At the same time, photobleaching and photodegradation resulting from continuous...

scholarly journals Quantitative Determination of Dark Chromophore Population Explains the Apparent Low Quantum Yield of Red Fluorescent Proteins

2020 ◽  
Vol 124 (8) ◽  
pp. 1383-1391 ◽  
Author(s):  
Jord C. Prangsma ◽  
Robert Molenaar ◽  
Laura van Weeren ◽  
Daphne S. Bindels ◽  
Lindsay Haarbosch ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Quantitative Determination ◽  
Fluorescent Proteins ◽  
Red Fluorescent Proteins

Fluorescence Enhancement of a Microbial Rhodopsin via Electronic Reprogramming

2018 ◽  
Author(s):  
Maria del Carmen Marin ◽  
Damianos Agathangelou ◽  
Yoelvis Orozco-González ◽  
Alessio Valentini ◽  
Yoshitaka Kato ◽  
...  
Keyword(s):  
Excited State ◽  
Quantum Yield ◽  
Excited States ◽  
Fluorescence Quantum Yield ◽  
Fluorescence Enhancement ◽  
Energy Surface ◽  
Wild Type ◽  
Excited State Lifetime ◽  
State Potential ◽  
Microbial Rhodopsin

The manuscript reports on two mutations of the photo-sensory protein Anabaena Sensory Rhodopsin and how these mutations modify the fluorescence quantum yield with respect to the wild-type protein. Experimental results are presented and explained theoretically on the basis of mixing of the S1 and S2 excited states. This mixing modulated by electrostatic and steric effects, tunes the excited state potential energy surface, and thereby the excited state lifetime and the fluorescence quantum yield.<br>

scholarly journals Generation of bright monomeric red fluorescent proteins via computational design of enhanced chromophore packing

2022 ◽  
Author(s):  
Sandrine Legault ◽  
Derek Paco Fraser-Halberg ◽  
Ralph McAnelly ◽  
Matthew G Eason ◽  
Michael Thompson ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Protein Design ◽  
Fluorescent Proteins ◽  
Computational Design ◽  
Computational Protein Design ◽  
Biological Research ◽  
Widespread Application ◽  
Red Fluorescent Proteins

Red fluorescent proteins (RFPs) have found widespread application in chemical and biological research due to their longer emission wavelengths. Here, we use computational protein design to increase the quantum yield...

Einfluß von Chlorsubstitution auf die El ektronenspektren von Biphenyl

1972 ◽  
Vol 27 (5) ◽  
pp. 756-759 ◽  
Author(s):  
H. Dreeskamp ◽  
O. Hutzinger ◽  
M. Zander
Keyword(s):  
Excited State ◽  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Emission Spectra ◽  
Liquid Solution ◽  
Quantum Yields ◽  
Decay Times ◽  
Fluorescence And Phosphorescence Spectra ◽  
Fluorescence And Phosphorescence ◽  
Phosphorescence Spectra

Abstract Absorption spectra in liquid solution, fluorescence and phosphorescence spectra, phosphores-cence quantum yields, phosphorescence to fluorescence quantum yield ratios, and phosphorescence decay times of 9 chloro substituted biphenyls dissolved in low temperature EPA glass were in-vestigated. The emission spectra of sterically unhindered systems are structured and significantly Stokes-shifted. Ortho substitution shifts the conjugation band in absorption as well as the un-structured fluorescence and phosphorescence bands to shorter wave lengths presumably by pre-venting the system from attaining a planar excited state. Chloro substitution which increases the rate constant of phosphorescence in the order meta < para < ortho, is nearly additive for multiple substituted systems and is correlated to the MO coefficients at the chloro substituted position in the absence of steric hindrance

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