| dc.creator | Talhavini, M | |
| dc.creator | Atvars, TDZ | |
| dc.date | 1998 | |
| dc.date | MAY-JUN | |
| dc.date | 2014-12-02T16:25:12Z | |
| dc.date | 2015-11-26T17:21:21Z | |
| dc.date | 2014-12-02T16:25:12Z | |
| dc.date | 2015-11-26T17:21:21Z | |
| dc.date.accessioned | 2018-03-29T00:08:51Z | |
| dc.date.available | 2018-03-29T00:08:51Z | |
| dc.identifier | Quimica Nova. Soc Brasileira Quimica, v. 21, n. 3, n. 332, n. 336, 1998. | |
| dc.identifier | 0100-4042 | |
| dc.identifier | WOS:000073678400015 | |
| dc.identifier | http://www.repositorio.unicamp.br/jspui/handle/REPOSIP/59532 | |
| dc.identifier | http://www.repositorio.unicamp.br/handle/REPOSIP/59532 | |
| dc.identifier | http://repositorio.unicamp.br/jspui/handle/REPOSIP/59532 | |
| dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/1283345 | |
| dc.description | We describe in this work a simple experimental set up to perform time dependent luminescence experiments in time scales from mill-seconds to seconds, based on the phase resolution of the emission signal. This system is composed by modulation of a continuous light source with an external chopper controlled by a lock-in amplifier. We exemplified the utility of the system in studies of phosphorecence emission using benzophenone dissolved in polystyrene and since the phosphorescence intensity and lifetime are temperature-dependent processes, we also studied polymer relaxation processes in the temperature range from 20 to 400K. A software that drives the spectrofluorimeter and controls both the cryosystem and the lock-in amplifier was developed. | |
| dc.description | 21 | |
| dc.description | 3 | |
| dc.description | 332 | |
| dc.description | 336 | |
| dc.language | pt | |
| dc.publisher | Soc Brasileira Quimica | |
| dc.publisher | Sao Paulo | |
| dc.publisher | Brasil | |
| dc.relation | Quimica Nova | |
| dc.relation | Quim. Nova | |
| dc.rights | aberto | |
| dc.source | Web of Science | |
| dc.subject | phase resolution lifetime determinations | |
| dc.subject | benzophenone | |
| dc.subject | polymer relaxation processes | |
| dc.title | Phosphorescence lifetime in polymer relaxation studies: Phase resolution method. | |
| dc.type | Artículos de revistas | |
