Conformational Fluctuations and Large Fluorescence Spectral Diffusion in Conjugated Polymer Single Chains at Low Temperatures

2005 ◽  
Vol 109 (41) ◽  
pp. 19099-19107 ◽  
Author(s):  
T. Pullerits ◽  
O. Mirzov ◽  
I. G. Scheblykin
Keyword(s):  
Low Temperatures ◽  
Conjugated Polymer ◽  
Spectral Diffusion

Spectral diffusion in glasses at low temperatures

1977 ◽  
Vol 24 (12) ◽  
pp. 813-816 ◽  
Author(s):  
P. Hu ◽  
L.R. Walker
Keyword(s):  
Low Temperatures ◽  
Spectral Diffusion

scholarly journals Anisotropic longitudinal electronic relaxation affects DNP at cryogenic temperatures

2017 ◽  
Vol 19 (24) ◽  
pp. 16087-16094 ◽  
Author(s):  
E. M. M. Weber ◽  
H. Vezin ◽  
J. G. Kempf ◽  
G. Bodenhausen ◽  
D. Abergél ◽  
...  
Keyword(s):  
Low Temperatures ◽  
Spectral Diffusion ◽  
Electronic Relaxation ◽  
Cryogenic Temperatures ◽  
Nitroxide Radicals

Anisotropic longitudinal electronic relaxation in nitroxide radicals can impact DNP at low temperatures in cases of slow spectral diffusion.

Large spectral diffusion of conjugated polymer single molecule fluorescence at low temperature

2005 ◽  
Vol 408 (4-6) ◽  
pp. 317-321 ◽  
Author(s):  
O. Mirzov ◽  
T. Pullerits ◽  
F. Cichos ◽  
C. von Borczyskowski ◽  
I.G. Scheblykin
Keyword(s):  
Low Temperature ◽  
Single Molecule ◽  
Conjugated Polymer ◽  
Spectral Diffusion ◽  
Single Molecule Fluorescence

Single-Molecule Spectroscopy on a Ladder-Type Conjugated Polymer: Electron-Phonon Coupling and Spectral Diffusion

ChemPhysChem ◽  
2009 ◽  
Vol 10 (14) ◽  
pp. 2524-2534 ◽  
Author(s):  
Richard Hildner ◽  
Laura Winterling ◽  
Ulrich Lemmer ◽  
Ullrich Scherf ◽  
Jürgen Köhler
Keyword(s):  
Single Molecule ◽  
Conjugated Polymer ◽  
Spectral Diffusion ◽  
Single Molecule Spectroscopy ◽  
Phonon Coupling ◽  
Electron Phonon Coupling

Interpretation of irradiation-induced changes in electron diffractograms and images of extinction contours at low temperatures

1984 ◽  
Vol 42 ◽  
pp. 268-269
Author(s):  
E. Knapek ◽  
H. Formanek ◽  
G. Lefranc ◽  
I. Dietrich
Keyword(s):  
Low Temperatures ◽  
Carbon Films ◽  
Organic Crystals ◽  
Wide Spread ◽  
Lens System ◽  
Preparation Conditions ◽  
Thin Carbon ◽  
Electron Diffractograms ◽  
Diffraction Patterns ◽  
Induced Changes

A few years ago results on cryoprotection of L-valine were reported, where the values of the critical fluence De i.e, the electron exposure which decreases the intensity of the diffraction reflections by a factor e, amounted to the order of 2000 + 1000 e/nm2. In the meantime a discrepancy arose, since several groups published De values between 100 e/nm2 and 1200 e/nm2 /1 - 4/. This disagreement and particularly the wide spread of the results induced us to investigate more thoroughly the behaviour of organic crystals at very low temperatures during electron irradiation.For this purpose large L-valine crystals with homogenuous thickness were deposited on holey carbon films, thin carbon films or Au-coated holey carbon films. These specimens were cooled down to nearly liquid helium temperature in an electron microscope with a superconducting lens system and irradiated with 200 keU-electrons. The progress of radiation damage under different preparation conditions has been observed with series of electron diffraction patterns and direct images of extinction contours.

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