| dc.creator | Lo Nostro, P | |
| dc.creator | Lopes, JR | |
| dc.creator | Cardelli, C | |
| dc.date | 2001 | |
| dc.date | 45474 | |
| dc.date | 2014-11-19T21:26:07Z | |
| dc.date | 2015-11-26T17:30:47Z | |
| dc.date | 2014-11-19T21:26:07Z | |
| dc.date | 2015-11-26T17:30:47Z | |
| dc.date.accessioned | 2018-03-29T00:17:38Z | |
| dc.date.available | 2018-03-29T00:17:38Z | |
| dc.identifier | Langmuir. Amer Chemical Soc, v. 17, n. 15, n. 4610, n. 4615, 2001. | |
| dc.identifier | 0743-7463 | |
| dc.identifier | WOS:000170029300026 | |
| dc.identifier | 10.1021/la010279c | |
| dc.identifier | http://www.repositorio.unicamp.br/jspui/handle/REPOSIP/67051 | |
| dc.identifier | http://www.repositorio.unicamp.br/handle/REPOSIP/67051 | |
| dc.identifier | http://repositorio.unicamp.br/jspui/handle/REPOSIP/67051 | |
| dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/1285586 | |
| dc.description | Aqueous solutions of beta- or gamma -cyclodextrin were found to form polypseudorotaxanes upon threading of linear hydrophobic polymers such as poly(propylene glycol) bis-2-aminopropyl ether, H3CCH(NH2)CH2(OCH2-CH(CH3))(n)NH2 (PPG-Am-2; MW approximate to 2000; n(av) approximate to 33), and pluronic 105, HO(CH2CH2O)(34)(CH2CH(CH3)O)(61)(CH2-CH2O)(34)H (PLU; MW approximate to 6500). The kinetics of the threading process was determined as a function of the temperature and solvent composition (water, heavy water, and urea). When the water solution of cyclodextrin was added to the polymer's dispersion, a thick solid precipitate was promptly formed, depending on the concentration and temperature. Turbidity measurements allowed us to determine the time necessary for a complete threading of the linear polymer (the "threading time"); this parameter depends on the solution temperature and on the solvent nature. A simple kinetic model provides the activation free energy of the process, and the number of cyclodextrin molecules threaded around a single linear chain. Enthalpy, entropy, and heat capacity changes are consistent with a process ruled by hydrophobic effects. | |
| dc.description | 17 | |
| dc.description | 15 | |
| dc.description | 4610 | |
| dc.description | 4615 | |
| dc.language | en | |
| dc.publisher | Amer Chemical Soc | |
| dc.publisher | Washington | |
| dc.publisher | EUA | |
| dc.relation | Langmuir | |
| dc.relation | Langmuir | |
| dc.rights | fechado | |
| dc.source | Web of Science | |
| dc.subject | Glycol) Triblock-copolymer | |
| dc.subject | Bromide Micellar Solutions | |
| dc.subject | Sodium Dodecyl-sulfate | |
| dc.subject | Inclusion Complexes | |
| dc.subject | Poly(ethylene Glycol) | |
| dc.subject | Alpha-cyclodextrin | |
| dc.subject | Beta-cyclodextrins | |
| dc.subject | Poly(propylene Glycol) | |
| dc.subject | Gamma-cyclodextrin | |
| dc.subject | Drug Carrier | |
| dc.title | Formation of cyclodextrin-based polypseudorotaxanes: Solvent effect and kinetic study | |
| dc.type | Artículos de revistas | |
