Indexed by:期刊论文
Date of Publication:2009-05-01
Journal:ANALYST
Included Journals:SCIE、PubMed、Scopus
Volume:134
Issue:5
Page Number:958-965
ISSN No.:0003-2654
Abstract:A cost-effective LED/photodiode(PD)-based time-domain luminescent lifetime measuring device with rugged electronics and simplified algorithms was assembled and successfully used to characterize oxygen sensing films, by continuously monitoring phosphorescence lifetime changes of phosphorescent platinum octaethylporphyrin (PtOEP) in cardo poly( aryl ether ketone) polymer (IMPEK-C) vs. variation of the oxygen partial pressure in a gas mixture (O(2)/N(2)). The results determined by both phosphorescence lifetime and intensity monitoring were compared and the lifetime mode gave results which are in good agreement with the intensity mode. The lifetime-based linear Stern-Volmer plot indicates that the PtOEP molecules are nearly homogeneously distributed in the sensing film. The phosphorescent lifetime of the PtOEP film changes from 75 mu s in neat N(2) to less than 2 mu s in neat O(2). The sensing system ( by combination of the PtOEP sensing film with the home-assembled lifetime device) gives a high lifetime-based O(2) sensing resolution, e. g. about 2 mu s Torr(-1) for low O(2) concentration (below 3.5% O(2), V/V). This feasible lifetime device configuration is affordable to most sensor laboratories and the device may facilitate the study of O(2) sensing material with the continuous lifetime monitoring method.
Professor
Supervisor of Doctorate Candidates
Supervisor of Master's Candidates
Gender:Male
Alma Mater:Jilin University
Degree:Doctoral Degree
School/Department:School of Chemistry Engineering
Discipline:Organic Chemistry. Applied Chemistry. Physical Chemistry (including Chemical Physics)
Business Address:西部校区E座208房间
Contact Information:0411-84986236
Open time:..
The Last Update Time:..