Excited-state dynamics of sinapate esters in aqueous solution and polyvinyl alcohol film

2019 ◽  
Vol 206 ◽  
pp. 469-473 ◽  
Author(s):  
Yan Liu ◽  
Xi Zhao ◽  
Jian Luo ◽  
Songqiu Yang
Keyword(s):  
Aqueous Solution ◽  
Excited State ◽  
Polyvinyl Alcohol ◽  
Excited State Dynamics ◽  
Polyvinyl Alcohol Film

Excited-state dynamics of guanosine in aqueous solution revealed by time-resolved photoelectron spectroscopy: experiment and theory

2015 ◽  
Vol 17 (47) ◽  
pp. 31978-31987 ◽  
Author(s):  
Franziska Buchner ◽  
Berit Heggen ◽  
Hans-Hermann Ritze ◽  
Walter Thiel ◽  
Andrea Lübcke
Keyword(s):  
Aqueous Solution ◽  
Excited State ◽  
Photoelectron Spectroscopy ◽  
Relaxation Dynamics ◽  
Time Resolved ◽  
Excited State Dynamics ◽  
Spectroscopy Experiment

Time-resolved photoelectron spectroscopy is performed on aqueous guanosine solution to study its excited-state relaxation dynamics.

scholarly journals Excited-State Dynamics of Quinine Sulfate and Its Di-Cation Doped in Polyvinyl Alcohol Thin Films Near Silver Nanostructure Islands

ACS Omega ◽  
2019 ◽  
Vol 4 (3) ◽  
pp. 5509-5516 ◽  
Author(s):  
Swatantra Kumar Yadav ◽  
Gopal Rawat ◽  
Sandeep Pokharia ◽  
Satyabrata Jit ◽  
Hirdyesh Mishra
Keyword(s):  
Thin Films ◽  
Excited State ◽  
Polyvinyl Alcohol ◽  
Quinine Sulfate ◽  
Excited State Dynamics ◽  
Silver Nanostructure

Excited-State Dynamics of Structurally Characterized [Re I (CO) 3 (phen)(HisX)] + (X = 83, 109) Pseudomonas a eruginosa Azurins in Aqueous Solution

2006 ◽  
Vol 128 (13) ◽  
pp. 4365-4370 ◽  
Author(s):  
Ana Mar�a Blanco-Rodr�guez ◽  
Michael Busby ◽  
Cristian Gradinaru ◽  
Brian R. Crane ◽  
Angel J. Di Bilio ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Excited State ◽  
Excited State Dynamics

scholarly journals Excited State Dynamics of 7-Deazaguanosine and Guanosine 5’ Monophosphate in Aqueous Solution

2020 ◽  
Author(s):  
Sarah E. Krul ◽  
Sean J. Hoehn ◽  
Karl Feierabend ◽  
Carlos Crespo-Hernández
Keyword(s):  
Aqueous Solution ◽  
Excited State ◽  
Potential Energy Surfaces ◽  
Internal Conversion ◽  
Transient Absorption ◽  
Relaxation Mechanism ◽  
Transient Absorption Spectroscopy ◽  
Experimental Conditions ◽  
Excited State Dynamics ◽  
Computational Calculations

Minor structural modifications to the DNA and RNA nucleobases have a significant effect on their excited state dynamics and electronic relaxation pathways.<b> </b>In this study, the excited state dynamics of 7-deazaguanosine and guanosine 5’-monophosphate are investigated in aqueous solution using femtosecond broadband transient absorption spectroscopy following excitation at 267 nm. The transient absorption spectra are collected under experimental conditions that eliminate the requirement to correct the data for the formation of hydrated electrons, resulting from the two-photon ionization of the solvent. The data is fitted satisfactorily using a two-component sequential kinetic model, yielding lifetimes of 210 ± 50 fs and 1.80 ± 0.02 ps, and 682 ± 40 fs and 1.4 ± 0.03 ps, for 7-deazaguanosine and guanosine 5’-monophosphate, respectively. By analyzing the results from steady-state, time-resolved, and computational calculations, the following relaxation mechanism is proposed for 7-deazaguanosine, S<sub>2</sub>(L<sub>b</sub>) ® S<sub>1</sub>(L<sub>a</sub>) ® S<sub>0</sub>, whereas a S<sub>2</sub>(L<sub>b</sub>) ® S<sub>1</sub>(L<sub>a</sub>) ® S<sub>0</sub>(hot)<sub> </sub>® S<sub>0 </sub>relaxation mechanism<sub> </sub>is proposed for guanosine 5’-monophosphate. Interestingly, longer lifetimes for both the L<sub>b</sub> ® L<sub>a</sub> and the L<sub>a</sub> ® S<sub>0</sub> internal conversion pathways are obtained for 7-deazaguanosine compare to guanosine 5’-monophosphate. Collectively, the results demonstrate that substitution of a single nitrogen for a methine (C-H) group at position seven of the guanine moiety stabilizes the <sup>1</sup>pp* L<sub>b</sub> and L<sub>a</sub> states and alters the topology of their potential energy surfaces in such a way that the population dynamics of both internal conversion pathways in 7-deazaguanosine are significantly slowed down compared to those in guanosine 5’-monophosphate.

Excited-State Dynamics of Rhodamine 6G in Aqueous Solution and at the Dodecane/Water Interface

2014 ◽  
Vol 118 (19) ◽  
pp. 5184-5193 ◽  
Author(s):  
Marina Fedoseeva ◽  
Romain Letrun ◽  
Eric Vauthey
Keyword(s):  
Aqueous Solution ◽  
Excited State ◽  
Rhodamine 6G ◽  
Water Interface ◽  
Excited State Dynamics

scholarly journals Unconventional two-step spin relaxation dynamics of [Re(CO)3(im)(phen)]+ in aqueous solution

2019 ◽  
Vol 10 (44) ◽  
pp. 10405-10411 ◽  
Author(s):  
Sebastian Mai ◽  
Leticia González
Keyword(s):  
Aqueous Solution ◽  
Excited State ◽  
Spin Relaxation ◽  
Intersystem Crossing ◽  
Relaxation Dynamics ◽  
Excited State Dynamics ◽  
Dynamics Simulations ◽  
Explicit Solvation

Full-dimensional excited-state dynamics simulations including explicit solvation show an unprecedented two-step intersystem crossing mechanism with electronic- and nuclear-driven components in [Re(CO)3(imidazole)(phenanthroline)]+.

Phase conjugation in methyl orange doped polyvinyl alcohol film by DFWM based on excited state absorption

1996 ◽  
Vol 123 (1-3) ◽  
pp. 189-194 ◽  
Author(s):  
Yanqiang Yang ◽  
Haosheng Fei ◽  
Zhenqian Wei ◽  
Qiguang Yang ◽  
Guijuan Shun ◽  
...  
Keyword(s):  
Excited State ◽  
Methyl Orange ◽  
Polyvinyl Alcohol ◽  
Phase Conjugation ◽  
Excited State Absorption ◽  
Polyvinyl Alcohol Film
Sign in / Sign up

Export Citation Format

Share Document