In this study, tetraphenylthiophenen (TP) with aggregation-induced emission enhancement (AIEE) property is served as terminal and central fluorophores of poly(£^-benzyl-L-glutamate) (PBLG)-based polymers of TP1PBLG and TP2PBLG, respectively, to probe for the relationship between the secondary structure (£\-helix) of polypeptides and the ALEE-operative fluorescence (FL). Intermolecular aggregation of the central TP unit in the di-substituted TP2PBLG is sterically blocked by the large £\-helical PBLG chains, which lead to the reduced AIEE-oriented FL. On the contrast, the terminal TP units in TP1PBLG can easily approach each other to form aggregates with strong FL. Factor (e.g. solvent annealing) controlling the fraction of £\-helix chain also varies the corresponding emission intensity. Conformational difference between TP1PBLG and TP2PBLG evaluated from the infrared and the X-ray (wide- and small-angle) diffraction spectra is also used to verify its influence on the AIEE-operative FL behavior.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0713112-182750 |
| Date | 13 July 2012 |
| Creators | Li, Shu-ting |
| Contributors | Jin-long Hong, Ming Chen, Shiao-wei Kuo, Lieh-li Lin |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0713112-182750 |
| Rights | user_define, Copyright information available at source archive |
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