Polymer blends fluorescence spectra

Fluorescence microscopy is an effective technique for studying the structure of polymer blend systems, as it not only reveals the quantitative spatial distribution of polymer components but also provides molecular information from the fluorescence spectrum and decay curve. Real-space observation in three dimensions with high time-resolution can reveal the detailed structure and formation process of the... 

In order to determine whether energy migration makes a significant contribution to the photophysical behavior of P2VN and PS in dilute miscible blends, it is instructive to calculate the expected exdmer-to-monomer fluorescence quantum yield ratio in the absence of energy migration. To do so, it is first necessary to assume that intermolecular and non-adjacent intramolecular EFS are absent. In addition, the adjacent intramolecular EFS are assumed to be frozen into the aryl vinyl polymer and must be excited by direct absorption of a photon. Since the absorption spectrum of an EFS is no different from that of non-EFS chromophores, then the calculated fraction of rings within EFS is sufficient to determine the fluorescence ratio. 

---