Abstract
The electron paramagnetic resonance (EPR) study has been carried out for the micellar solutions of various ionic surfactant solutions as well as various generations of aqueous dendrimer both in their respective presence as well as their absence at 25°C and in different media. From these measurements, the rotation correlation time (τB) have been calculated for all the ionic surfactant + PAMAM + water system. A variation in the τBvalue remains mostly constant for the dodecyltrimethyammonium bromide (DTAB) and tetradecyltrimethylammonium bromide (TTAB) + PAMAM + water ternary mixtures. The τBvalue shows an increase with the increase in the amount of PAMAM for SDS in basic medium and for 12-2-12 in acidic medium. It has been concluded from these results that SDS undergo complexation with all generations of PAMAM in basic medium and 12-2-12 in acidic medium and produce stronger hydrophobic environment. The nuclear magnetic resonance study (NMR) allowed us to evaluate the spin–spin relaxation (T1) times of SDS in the presence of all generations of PAMAM. The T1 values for all the tail protons of SDS showed a slight decrease with the increase in the constant amount of PAMAM suggesting the adsorption of PAMAM molecules on the micelle surface.
Similar content being viewed by others
References
Ottaviani MF, Turro NJ, Jockusch S, Tomalia DA (1996) Colloids Surf 115:9
Ottaviani MF, Andechaga P, Turro NJ, Tomalia DA (1997) J Phys Chem 101:6057
Tomalia DA, Naylor AM, Goddard WA (1990) Angew Chem Int Ed Engl 29:138
Esumi K, Kuwabara K, Chiba T, Kubayashi F, Mizutani H, Torigoe K (2002) Colloids Surf 197:141
Esumi K, Saika R, Miyazaki M, Torigoe K (2000) Colloids Surf 166:115
Caminati G, Turro NJ, Tomalia DA (1990) J Am Chem Soc 112:8515
Bakshi MS, Sood R (2004) Colloid Surf 233:203
Bakshi MS, Sood R (2004) J Colloid Interface Sci 277:221
Bakshi MS, Kaura A, Mahajan RK, Yoshimura T, Esumi K (2004) Colloid Surf 246:39
Bakshi MS, Kaura A (2004) Colloid Surf 244:45
Bakshi MS, Kaura A, Miller JD, Paruchuri VK (2004) J Colloid Interface Sci 278:472
Jockusch S, Turro NJ, Ottaviani MF, Tomalia DA
Ottaviani MF, Matteini P, Brustolon B, Turro NJ, Jockusch S, Tomalia DA (1998) J Phys Chem 102:6029
Ottaviani MF, Daddi R, Brustolon M, Turro NJ, Tomalia DA (1999) Langmuir 15:1973
Tomalia DA, Hall M, Hedstrand DM (1987) J Am Chem Soc 109:1601
Tomalia DA, Naylor AM, Goddard WA III (1990) Angew Chem Int Ed Engl 29:138
Tomalia DA, Durst HD (1993) In: Weber E (ed) Topics in current chemistry, vol 165. Springer, Berlin Heidelberg New York, p 193
Ottaviani MF, Favuzza P, Sacchi B, Turro NJ, Jockusch S, Tomalia DA (2002) Langmuir 18:2347
Duncan R (1996) Proc Natl Acad Sci USA 93:4897
Bielinska AU, kukowska-Latallo JF, Johnson J, Tomalia DA, Baker JR (1996) Nucleic Acids Res 24:2176
kukowska-Latallo JF, Bielinska AU, Johnson J, Spindler R, Tomalia DA, Baker JR Jr (1996) Proc Natl Acad Sci USA 93:4897
Kim Y, Zimmerman SC (1988) Curr Opin Chem Biol 2:733
Bales BL, Ranganathan R, Griffiths PC (2001) J Phys Chem B 105:7465
Bales BL, Zana R (2002) J Phys Chem B 106:1926
Bales BL (1989) Inhomogeneously Broadened Spin-Label Spectra. In: Berliner LJ, reuben J (eds) Biological magnetic resonance, vol 8. Plenum Publishing Corporation, New York, p 77
Schreier S, Polnaszek CF, Smith ICP (1978) Biochim Biophys Acta 515:375
Acknowledgments
Financial assistance from CSIR under a research project [Ref. No. 01(1777)/02/EMR-II] is thankfully acknowledged. R. Sood thanks the CSIR, New Delhi, for a Junior Research Fellowship. Support for this project from the NIH/NIGMS SCORE program under contract S06 GM48680, the CSUN Research and Grants Committee, the College of Science and Mathematics is acknowledged.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Bakshi, M.S., Sood, R., Ranganathan, R. et al. ESR and NMR studies of poly (amidoamine) dendrimers with ionic surfactants in different media. Colloid Polym Sci 284, 58–65 (2005). https://doi.org/10.1007/s00396-005-1340-3
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00396-005-1340-3