%0 Journal Article %1 ECKSTEIN20161 %A Eckstein, Angela %A Karpicz, Renata %A Augulis, Ramūnas %A Redeckas, Kipras %A Vengris, Mikas %A Namal, Imge %A Hertel, Tobias %A Gulbinas, Vidmantas %D 2016 %J Chemical Physics %K PFO-BPy SWNT fluorescence myown %P 1 - 5 %R https://doi.org/10.1016/j.chemphys.2015.12.006 %T Excitation quenching in polyfluorene polymers bound to (6,5) single-wall carbon nanotubes %U http://www.sciencedirect.com/science/article/pii/S0301010415300628 %V 467 %X Fluorescence quenching of polyfluorene-based polymer (PFO-BPy) attached to single-wall carbon nanotubes (SWNT) has been investigated by means of fluorescence and transient absorption spectroscopy. Fluorescence of SWNT/PFO-BPy complex suspension in chlorobenzene decays nonexponentialy on a time scale from several to several hundreds of picoseconds, and experiences slower depolarization if compared with free polymer in solution. We attribute the slowly quenched and more polarized fluorescence to the polymer tail segments that are not in direct contact with the SWNT. Polymer fluorescence in SWNT/PFO-BPy solid films is quenched about 10times faster than in suspensions. The initial excited state quenching in films occurs with a 2.3ps time constant, which we attribute to the polymer chains intimately attached to the SWNT. Slow changes of the spectroscopic properties of the SWNT/PFO-BPy suspensions with time revealed that their aging is associated with the desorption of polymers from SWNT, increasing their tendency to aggregate.

@article{ECKSTEIN20161, abstract = {Fluorescence quenching of polyfluorene-based polymer (PFO-BPy) attached to single-wall carbon nanotubes (SWNT) has been investigated by means of fluorescence and transient absorption spectroscopy. Fluorescence of SWNT/PFO-BPy complex suspension in chlorobenzene decays nonexponentialy on a time scale from several to several hundreds of picoseconds, and experiences slower depolarization if compared with free polymer in solution. We attribute the slowly quenched and more polarized fluorescence to the polymer tail segments that are not in direct contact with the SWNT. Polymer fluorescence in SWNT/PFO-BPy solid films is quenched about 10times faster than in suspensions. The initial excited state quenching in films occurs with a 2.3ps time constant, which we attribute to the polymer chains intimately attached to the SWNT. Slow changes of the spectroscopic properties of the SWNT/PFO-BPy suspensions with time revealed that their aging is associated with the desorption of polymers from SWNT, increasing their tendency to aggregate.}, added-at = {2021-01-12T16:27:21.000+0100}, author = {Eckstein, Angela and Karpicz, Renata and Augulis, Ramūnas and Redeckas, Kipras and Vengris, Mikas and Namal, Imge and Hertel, Tobias and Gulbinas, Vidmantas}, biburl = {https://www.bibsonomy.org/bibtex/26fe6f3051f2aaffac7f6fc389482e930/hertel-group}, description = {Excitation quenching in polyfluorene polymers bound to (6,5) single-wall carbon nanotubes - ScienceDirect}, doi = {https://doi.org/10.1016/j.chemphys.2015.12.006}, interhash = {ab83b1424118303c650d4e3540478fa7}, intrahash = {6fe6f3051f2aaffac7f6fc389482e930}, issn = {0301-0104}, journal = {Chemical Physics}, keywords = {PFO-BPy SWNT fluorescence myown}, pages = {1 - 5}, timestamp = {2021-01-27T09:15:11.000+0100}, title = {Excitation quenching in polyfluorene polymers bound to (6,5) single-wall carbon nanotubes}, url = {http://www.sciencedirect.com/science/article/pii/S0301010415300628}, volume = 467, year = 2016 }