The chemical structures of the PFR, F8BT, PS, and polynorbornene polymers used in this work.
(a) shows the PL emission from a pure thin film of PFR at 4 K, while (b) shows the PL from F8BT recorded at the same temperature.
A typical real-space image of the PFR SM emission when dispersed in Zeonex at a concentration of .
(a) shows a series of ensemble PL emission spectra recorded from PFR when dispersed in a Zeonex thin film. In each case, the concentration at which PFR was dissolved into the solution used to cast the film is shown in the figure legend. (b) shows the PL emission from PFR and F8BT in toluene solution at a concentration of . (c) shows the PL relative intensity of green (measured at 540 nm) compared to red (at 642 nm) fluorescence emission from a PFR ensemble when dispersed into a Zeonex thin film, plotted as a function of the concentration at which PFR was dispersed into the solution used to cast the film. (d) shows the temperature dependence of the ratio of green- to red-emission intensity from PFR when dispersed in Zeonex at as a function of temperature.
Two typical SM emission spectra recorded at 4 K for (a) PFR and (b) F8BT when dispersed in the matrix Zeonex. Here, spectra characterized by (green) BT emission are plotted using a solid line, while emission from molecules where red fluorescence dominates is shown using open circles.
A typical SM emission spectrum recorded at 4 K for (a) PFR and (b) F8BT when dispersed in a PS matrix.
Shows a series of histograms identifying the wavelength of the various SM emission peaks measured at 4 K. (a) and (b) correspond to PFR SMs dispersed in Zeonex and PS, respectively. (c) and (d) correspond to F8BT SMs in Zeonex and PS, respectively.
(a) shows a real-space intensity image of PFR SMs dispersed in Zeonex. Data points shown in (b), (c), and (d) show the integrated emission intensity from spots 1, 2, and 3, respectively, vs the polarization angle of the excitation laser. The solid lines shown in (c) and (d) are fits to the data made using Eq. (1) (see text for details).
SM anisotropy factor for PFR when dispersed in PS (a) and in Zeonex (b).
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