Factors affecting the complexation of polyacrylic ... - ResearchGate

2744 DUBOLAZOV ET AL.tion of UO 2 (OH) þ alters the complexationbehavior of PAA, thus reducing the emissioncoming from PAA/UO 2þ2complex. Onlyat pH 3.25, H þ has no significant effect onthe complexation of uranyl with PAA.2. The influence of salt concentration hasbeen studied by using sodium and potassiumnitrate salts. The fluorescence intensitywas first observed to increase withincreasing salt concentration and thendecreased. The decrease in intensity wasassumed to be mostly due to the collapse ofPAA chains, as observed by the increasingturbidity of solutions at higher salt concentrations.3. Temperature has limited effect on fluorescenceintensity of complex within therange of 25–50 8C.4. The luminescence quenching rate constantof H þ , k q ¼ 1.7 10 8 M 1 s 1 determinedfrom Stern–Volmer plot was found to be invery good accordance with the reported literaturevalues. The order of quenching efficienciesof the ions were found to be k q (H þ )>> k q (K þ ) > k q (Na þ ). Because of the combinedeffects of dynamic and static quenchingprocesses a nonlinear Stern–Volmerplot was observed for the salts studied.REFERENCES AND NOTES1. Pekel, N.; S˛ ahiner, N.; Güven, O. Radiat PhysChem 2000, 59, 485–491.2. S˛ ahiner, N.; Pekel, N.; Güven, O. Reactive FunctPolym 1999, 39, 139–146.3. S˛ ahiner, N.; Pekel, N.; Akkas˛, P.; Güven, O.;J Macromol Sci, Pure and Appl Chem 2000, 37A,1159–1172.4. Choi, S. H.; Nho, Y. C. Rad Phys Chem 2000, 57,187–193.5. Beavais, R. A.; Alexandratos, S. D. ReactiveFunct Polym 1998, 36, 113–123.6. Morlay, C.; Cromer, M.; Mouginot, Y.; Vottori, O.Talanta 1999, 48, 1159–1166.7. Morlay, C.; Cromer, M.; Mouginot, Y.; Vottori, O.Talanta 1998, 45, 1177–1188.8. Molyneux, P. Water-Soluble Synthetic Polymers:Properties and Behavior, Vol. 2; CRC Press: BocaRaton, 1982.9. Roma-Luciow, R.; Saraff, L.; Morcellet, M. PolymBull 2000, 45, 411–418.10. Gregor, H. P.; Luttinger, L. B.; Loebl, E. M.J Phys Chem 1955, 59, 34–39.11. Nishide, H.; Oki, N.; Tsuchida, E. Eur Polym J1982, 18, 799–802.12. Leroy, D.; Martinot, L.; Jerome, C.; Jerome, R.Polymer 2001, 42, 4589–4596.13. Saito, T.; Nagasaki, S.; Tanaka, S. RadiochimActa 2002, 90, 27–33.14. Watanabe, C. N.; Gehlen, M. H. J PhotochemPhotobiol A: Chem 2003, 156, 65–68.15. Rustenholtz, A.; Billard, I.; Duplâtre, G.; Lützenkirchen,K.; Sémon, L. Radiochim Acta 2001, 89,83–89.16. Szintay, G.; Horváth, A. Inorg Chim Acta 2001,324, 278–285.17. Addleman, R. S.; Carrott, M.; Wai, C. M.; Carleson,T. E.; Wenclawiak, B. W. Anal Chem 2001,73, 1112–1119.18. Meiranth, G. Aquatic chemistry of uranium, FreibergOn-line Geoscience 1998, 1; available at http://www.geo.tu_freiberg/fog (June 19, 2003).19. Dubolazov, A. V.; Güven, O.; Pekel, N.; Azhgozhinova,G. S.; Mun, G. A.; Nurkeeva, Z. S.J Polym Sci Part B: Polym Phys 2004, 42,1610–1618.20. Kato, B. Y.; Meinrath, G.; Kimura, T.; Yoshida, Z.Radiochim Acta 1994, 64, 107–113.21. Leung, A. F.; Hayashibara, L.; Spadaro, J. J PhysChem Solids 1999, 60, 299–304.22. Nagata, I.; Okamoto, Y. Macromolecules 1983, 16,749–753.23. Moll, H.; Geipel, G.; Reich, T.; Bernhard, G.; Fanghanel,T.; Grenthe, I. Radiochim Acta 2003, 91,11–20.24. Sebastian, N.; George, B.; Mathew, B. PolymDegrad Stab 1998, 60, 371–375.25. Bodzek, M.; Korus, I.; Loska, K. Desalination1999, 121, 117–121.26. Schiewer, S.; Volesky, B. Environ Sci Technol1995, 29, 3049–3058.27. Yang, J.; Volesky, B. Internat BiohydrometallSymp Proc B 1999, 483–492.28. Hongxia, Z.; Zuyi, T. J Radioanal Nucl Chem2002, 254, 103–107.29. Moulin, C.; Decambox, P.; Trecani, L. Anal ChimActa 1996, 321, 121–126.30. Morawetz, H. Macromolecules in Solution, Wiley:New York 1975, p 366.31. Kim, G. H.; Lee, J. H.; Lee, H. B.; John, M. S.J Colloid Interface Sci 1993, 157, 82–87.32. Iida, S. Biophys Chem 1996, 57, 133–142.33. Weast, R. C. Handbook of Chemistry andPhysics, 53rd ed.; The Chemical Rubber Co.:Ohio, 1973.34. Adenier, A.; Aaron, J. J. Spectrochim Acta A 2002,58, 543–551.35. Rao, L.; Jiang, J.; Zanonato, P. L.; Bernardo, P.D.; Bismondo, A.; Garnov, A. Y. Radiochim Acta2002, 90, 581–588.