Chemical structure of the BODIPY molecule used in this study.
Schematic representation of the SM experiment. is the emission transition dipole moment of the dye molecule. and are the orthogonal polarization intensities separated by a cube beam splitter and collected through two APDs.
Distributions [(a) and (b)] and autocorrelation functions [(c) and (d)] of the linear dichroism simulated for a dumbbell (probe) in the coarse-grained model either in the melt [, (a) and (c)] or in the supercooled regime [, (b) and (d)]. The linear dichroism distributions obtained for a , 0.95, and 1.4 are plotted in solid (black), dash (blue), and dot (red) lines, respectively. The corresponding are plotted as crosses, squares, and circles, respectively, and fitted by both a KWW function (solid blue line) and a single exponential function (dash red line).
scans of the samples performed with either an oil (a) or dry (b) objective at a rate of . The colors indicate the polarization of the molecules in the plane of the sample with red being attributed to the parallel polarization channel, green attributed to the perpendicular polarization channel, and yellow pertains to molecules that have their orientation in between these two channels.
Linear dichroism time traces of molecules embedded in the poly(methyl acrylate) matrix, maintained at a temperature , having their fluorescence emission collected via an oil (a) or a dry (b) objective. Corresponding distributions (c) and time autocorrelation functions [(d), squares for the oil, circles for the dry objective], fitted by both a KWW function (solid line) and a single exponential function (dash line).
Distributions of the relaxation times determined by using either the empirical method (see text, broad, red bars) or by fitting with a KWW law (narrow, blue bars) the time correlation functions of molecules observed either with the oil (a) or dry (b) objective. The insets show the corresponding distributions of the stretching parameters .
Correlation functions built by the Jackknife approach (Refs. 36 and 37) on the basis of the best ten traces of molecules observed with either the oil (squares) or dry (circles) objective. The KWW fits are also shown.
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