TY - JOUR
T1 - Polyaromatic-Anion Behavior of Different Polyelectrolytes Containing Benzenecarboxylate Units
AU - Moreno-Villoslada, Ignacio
AU - Flores, Mario E.
AU - Marambio, Oscar G.
AU - Pizarro, Guadalupe Del C
AU - Nishide, Hiroyuki
PY - 2010/6/17
Y1 - 2010/6/17
N2 - The polyaromatic-ion behavior of poly(sodium N-maleoyl-2-aminobenzoate-co- sodium acrylate) in a comonomer composition 1:2, poly(sodium N-maleoyl-4-aminobenzoate-co-sodium acrylate) in a comonomer composition 1:2, and poly(sodium N-maleoyl-4-aminobenzoate-co-N,N-dimethylacrylamide) in a comonomer composition 1:1 is studied. The copolymers undergo short-range aromatic-aromatic interactions with methylene blue and rhodamine B, as a consequence of which their UV-vis monomer band is shifted to lower energies. As a result of their polyaromatic-anion behavior, methylene blue is easily dispersed on the polymeric domains. Moreover, the pKa of rhodamine B is shifted from 3.2 to 4.5-5 in the presence of these copolymers. This behavior is also observed in the presence poly(sodium 4-styrenesulfonate), but not in the presence of poly(sodium vinyl sulfonate), which are taken as reference polymers. Compared with poly(sodium 4-styrenesulfonate), a lower resistance to the cleaving effect of added NaCl on the interaction with methylene blue is found. A different influence on the reduction of 2,3,5-triphenyl-2H-tetrazolium chloride with ascorbic acid was found for the different polyelectrolytes.
AB - The polyaromatic-ion behavior of poly(sodium N-maleoyl-2-aminobenzoate-co- sodium acrylate) in a comonomer composition 1:2, poly(sodium N-maleoyl-4-aminobenzoate-co-sodium acrylate) in a comonomer composition 1:2, and poly(sodium N-maleoyl-4-aminobenzoate-co-N,N-dimethylacrylamide) in a comonomer composition 1:1 is studied. The copolymers undergo short-range aromatic-aromatic interactions with methylene blue and rhodamine B, as a consequence of which their UV-vis monomer band is shifted to lower energies. As a result of their polyaromatic-anion behavior, methylene blue is easily dispersed on the polymeric domains. Moreover, the pKa of rhodamine B is shifted from 3.2 to 4.5-5 in the presence of these copolymers. This behavior is also observed in the presence poly(sodium 4-styrenesulfonate), but not in the presence of poly(sodium vinyl sulfonate), which are taken as reference polymers. Compared with poly(sodium 4-styrenesulfonate), a lower resistance to the cleaving effect of added NaCl on the interaction with methylene blue is found. A different influence on the reduction of 2,3,5-triphenyl-2H-tetrazolium chloride with ascorbic acid was found for the different polyelectrolytes.
UR - http://www.scopus.com/inward/record.url?scp=77953414376&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77953414376&partnerID=8YFLogxK
U2 - 10.1021/jp101684w
DO - 10.1021/jp101684w
M3 - Article
C2 - 20496926
AN - SCOPUS:77953414376
SN - 1520-6106
VL - 114
SP - 7753
EP - 7759
JO - Journal of Physical Chemistry B Materials
JF - Journal of Physical Chemistry B Materials
IS - 23
ER -