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http://dspace.mediu.edu.my:8181/xmlui/handle/123456789/4352Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.creator | Talhavini M. | - |
| dc.creator | Atvars T. D. Z. | - |
| dc.date | 1998 | - |
| dc.date.accessioned | 2013-05-30T11:02:44Z | - |
| dc.date.available | 2013-05-30T11:02:44Z | - |
| dc.date.issued | 2013-05-30 | - |
| dc.identifier | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40421998000300015 | - |
| dc.identifier | http://www.doaj.org/doaj?func=openurl&genre=article&issn=01004042&date=1998&volume=21&issue=3&spage=332 | - |
| dc.identifier.uri | http://koha.mediu.edu.my:8181/jspui/handle/123456789/4352 | - |
| dc.description | We describe in this work a simple experimental set up to perform time dependent luminescence experiments in time scales from mili-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.publisher | Sociedade Brasileira de Química | - |
| dc.source | Química Nova | - |
| dc.subject | phase resolution lifetime determinations | - |
| dc.subject | benzophenone | - |
| dc.subject | polymer relaxation processes | - |
| dc.title | Aquisição de tempos de vida de fosforescência com resolução de fase e sua aplicação ao estudo de relaxações em polímeros | - |
| Appears in Collections: | Chemistry | |
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