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Abstract:

Interactions in a probe-polymer cage were monitored by spectral fluctuations in the emission spectroscopy of single molecules of Nile Red in poly(alkyl methacrylate) thin films (25-200 nm) in the 278-323 K temperature range. Three types of emission spectra were identified. The highest emission energy spectra show small amplitude fluctuations and a very low probability of changing their spectral emission features. On the other hand, the other two types of emission profiles exchange more frequently. The fluctuations are analyzed by the complementary cumulative distribution function of spectral emission energy difference between successive spectra in a time trace. The fluctuations show three components: two of them with zero mean average and distinctly different standard deviations and a third component with much lower frequency and an amplitude absolute value of 0.13-0.15 eV. This amplitude is the same in all conditions, pointing to a common feature of the probe-polymer cage as responsible for their presence: complex cage rearrangements, involving the carbonyl side chain of the polymer as the common actor are postulated to be the cause of these spectral fluctuations in the time range of seconds. © 2012 American Chemical Society.

Registro:

Documento: Artículo
Título:Cage effect in poly(alkyl methacrylate) thin films studied by nile red single molecule fluorescence spectroscopy
Autor:Araoz, B.; Täuber, D.; Von Borczyskowski, C.; Aramendía, P.F.
Filiación:INQUIMAE, Departamento de Química Inorgaìnica, Analítica y Química Física, Universidad de Buenos Aires, Pabellón 2, C1428EHA, Buenos Aires, Argentina
Optical Spectroscopy and Molecular Physics Group, Institute of Physics, Chemnitz University of Technology, Pabellón 2, D-09107 Chemnitz, Germany
Palabras clave:Absolute values; Cage effect; Complementary cumulative distribution functions; Emission energies; Emission profile; Emission spectrums; Low probability; Lower frequencies; Nile red; Side-chains; Single molecule; Single-molecule fluorescence spectroscopy; Small amplitude; Spectral emission; Spectral fluctuations; Standard deviation; Temperature range; Third component; Three component; Time range; Time trace; Emission spectroscopy; Fluorescence spectroscopy; Polymers; Probes; Thin films
Año:2012
Volumen:116
Número:13
Página de inicio:7573
Página de fin:7580
DOI: http://dx.doi.org/10.1021/jp3004097
Título revista:Journal of Physical Chemistry C
Título revista abreviado:J. Phys. Chem. C
ISSN:19327447
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_19327447_v116_n13_p7573_Araoz

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Citas:

---------- APA ----------
Araoz, B., Täuber, D., Von Borczyskowski, C. & Aramendía, P.F. (2012) . Cage effect in poly(alkyl methacrylate) thin films studied by nile red single molecule fluorescence spectroscopy. Journal of Physical Chemistry C, 116(13), 7573-7580.
http://dx.doi.org/10.1021/jp3004097
---------- CHICAGO ----------
Araoz, B., Täuber, D., Von Borczyskowski, C., Aramendía, P.F. "Cage effect in poly(alkyl methacrylate) thin films studied by nile red single molecule fluorescence spectroscopy" . Journal of Physical Chemistry C 116, no. 13 (2012) : 7573-7580.
http://dx.doi.org/10.1021/jp3004097
---------- MLA ----------
Araoz, B., Täuber, D., Von Borczyskowski, C., Aramendía, P.F. "Cage effect in poly(alkyl methacrylate) thin films studied by nile red single molecule fluorescence spectroscopy" . Journal of Physical Chemistry C, vol. 116, no. 13, 2012, pp. 7573-7580.
http://dx.doi.org/10.1021/jp3004097
---------- VANCOUVER ----------
Araoz, B., Täuber, D., Von Borczyskowski, C., Aramendía, P.F. Cage effect in poly(alkyl methacrylate) thin films studied by nile red single molecule fluorescence spectroscopy. J. Phys. Chem. C. 2012;116(13):7573-7580.
http://dx.doi.org/10.1021/jp3004097