% IMPORTANT: The following is UTF-8 encoded. This means that in the presence % of non-ASCII characters, it will not work with BibTeX 0.99 or older. % Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or % “biber”. @ARTICLE{Inal:201085, author = {Inal, Sahika and Chiappisi, Leonardo and Kölsch, Jonas D. and Kraft, Mario and Appavou, Marie-Sousai and Scherf, Ullrich and Wagner, Manfred and Hansen, Michael Ryan and Gradzielski, Michael and Laschewsky, André and Neher, Dieter}, title = {{T}emperature-{R}egulated {F}luorescence and {A}ssociation of an {O}ligo(ethyleneglycol)methacrylate-{B}ased {C}opolymer with a {C}onjugated {P}olyelectrolyte—{T}he {E}ffect of {S}olution {I}onic {S}trength}, journal = {The journal of physical chemistry / B}, volume = {117}, number = {46}, issn = {1520-5207}, address = {Washington, DC}, publisher = {Soc.}, reportid = {FZJ-2015-03395}, pages = {14576 - 14587}, year = {2013}, abstract = {Aqueous mixtures of a dye-labeled non-ionic thermoresponsive copolymer and a conjugated cationic polyelectrolyte are shown to exhibit characteristic changes in fluorescence properties in response to temperature and to the presence of salts, enabling a double-stimuli responsiveness. In such mixtures at room temperature, i.e., well below the lower critical solution temperature (LCST), the emission of the dye is strongly quenched due to energy transfer to the polycation, pointing to supramolecular interactions between the two macromolecules. Increasing the concentration of salts weakens the interpolymer interactions, the extent of which is simultaneously monitored from the change in the relative emission intensity of the components. When the mixture is heated above its LCST, the transfer efficiency is significantly reduced, signaling a structural reorganization process, however, surprisingly only if the mixture contains salt ions. To elucidate the reasons behind such thermo- and ion-sensitive fluorescence characteristics, we investigate the effect of salts of alkali chlorides, in particular of NaCl, on the association behavior of these macromolecules before and after the polymer phase transition by a combination of UV–vis, fluorescence, and 1H NMR spectroscopy with light scattering and small-angle neutron scattering measurements}, cin = {JCNS (München) ; Jülich Centre for Neutron Science JCNS (München) ; JCNS-FRM-II / Neutronenstreuung ; JCNS-1}, ddc = {530}, cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 / I:(DE-Juel1)JCNS-1-20110106}, pnm = {54G - JCNS (POF2-54G24)}, pid = {G:(DE-HGF)POF2-54G24}, experiment = {EXP:(DE-MLZ)KWS1-20140101}, typ = {PUB:(DE-HGF)16}, UT = {WOS:000327557700040}, doi = {10.1021/jp408864s}, url = {https://juser.fz-juelich.de/record/201085}, }