Emission lifetimes of a fluorescent dye under shock compression
Journal Article
·
· Journal of Physical Chemistry. A, Molecules, Spectroscopy, Kinetics, Environment, and General Theory
- Univ. of Illinois at Urbana-Champaign, Urbana, IL (United States); Carnegie Institution of Washington
- Univ. of Illinois at Urbana-Champaign, Urbana, IL (United States)
The emission lifetimes of rhodamine 6G (R6G), were measured under shock compression to 9.1 GPa, with the dual intent of better understanding molecular photophysics in extreme environments and assessing the usefulness of fluorescence lifetime microscopy to measure spatially-dependent pressure distributions in shocked microstructured media. R6G was studied as free dye dissolved in poly-methyl methacrylate (PMMA), or dye encapsulated in silica microparticles suspended in PMMA. Thin layers of these materials in impedance-matched geometries were subjected to planar single-stage shocks created by laser-driven flyer plates. A synchronized femtosecond laser excited the dye at selected times relative to flyer plate arrival and the emission lifetimes were measured with a streak camera. Lifetimes decreased when shocks arrived. The lifetime decrease was attributed to a shock-induced enhancement of R6G nonradiative relaxation. At least part of the relaxation involved shock-enhanced intersystem crossing. For free dye in PMMA, the lifetime decrease during the shock was shown to be a linear function of shock pressure from 0-9 GPa, with a slope of -0.22 ns·GPa-1. Furthermore, the linear relationship makes it simple to convert lifetimes into pressures. Lifetime measurements in shocked microenvironments may be better than emission intensity measurements, since lifetimes are sensitive to the surrounding environment, but insensitive to intensity variations associated with the motion and optical properties of a dynamically changing structure.
- Research Organization:
- Carnegie Institution of Washington, Washington, D.C. (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- NA0002006
- OSTI ID:
- 1335495
- Journal Information:
- Journal of Physical Chemistry. A, Molecules, Spectroscopy, Kinetics, Environment, and General Theory, Journal Name: Journal of Physical Chemistry. A, Molecules, Spectroscopy, Kinetics, Environment, and General Theory Journal Issue: 44 Vol. 119; ISSN 1089-5639
- Publisher:
- American Chemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
High-Speed Laser-Launched Flyer Impacts Studied with Ultrafast Photography and Velocimetry
|
journal | February 2016 |
Exploration of CdTe quantum dots as mesoscale pressure sensors via time-resolved shock-compression photoluminescent emission spectroscopy
|
journal | July 2016 |
Shock compression dynamics under a microscope
|
conference | January 2017 |
Fluorescence temperature sensing based on thermally activated singlet-triplet intersystem crossing in crystalline anthracene
|
journal | August 2019 |
Similar Records
Bright emissive core-shell spherical microparticles for shock compression spectroscopy
Influence of silver nanoparticles on relaxation processes and efficiency of dipole – dipole energy transfer between dye molecules in polymethylmethacrylate films
Kinetic peculiarities of rhodamine 6G photodegradation in polymethylmethacrylate
Journal Article
·
Mon Jul 21 00:00:00 EDT 2014
· Journal of Applied Physics
·
OSTI ID:22308465
Influence of silver nanoparticles on relaxation processes and efficiency of dipole – dipole energy transfer between dye molecules in polymethylmethacrylate films
Journal Article
·
Sat Oct 31 00:00:00 EDT 2015
· Quantum Electronics (Woodbury, N.Y.)
·
OSTI ID:22551171
Kinetic peculiarities of rhodamine 6G photodegradation in polymethylmethacrylate
Journal Article
·
Wed Oct 01 00:00:00 EDT 1986
· J. Appl. Spectrosc. (Engl. Transl.); (United States)
·
OSTI ID:6948342