Abstract
Two novel conjugated polymers (PTP-SiO) and (PTP-P-SiO) with alternating N-containing heterocycles and siloxane (-Si-O-) units were synthesized using the Heck reaction. The incorporation of siloxane units in the polymers improves their thermal stability and processability. The polymers can be dissolved in organic solvent and exhibited good thermal stability with 5¢H weight loss temperature above 370¢J under nitrogen atmosphere. The photoluminescence (PL) spectra of PTP-SiO and PTP-P-SiO in solution show maximum peaks at 491 and 520 nm respectively. The heterocycles in the two polymers contain N- atoms, which can coordinate with transition or lanthanides metal ions to form complexes. The absorption spectra show peaks at around 275~290 nm and 320~330 nm, which are attributed to £k-£k* and n-£k* transitions, respectively. On the other hand, the emission spectra consist of peaks at around 408~420 nm and 491~520 nm. These two emission peaks belong to £k-£k* and n-£k* transitions of the ligands, respectively. With pyridazine ( heterocycle with ¡VN=N- group) ring, PTP-P-SiO shows more significant variation upon coordination with metals ions as compared to PTP-SiO. These variations of optical property offer a possibility for application in chemosensors for detection of metal ions.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0701103-171737 |
| Date | 01 July 2003 |
| Creators | Fang, Chi-Long |
| Contributors | L. L. Lin, S. J. Bai, Jin-Long Hong, Ming Chen |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0701103-171737 |
| Rights | withheld, Copyright information available at source archive |
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