| Content Provider | MDPI |
|---|---|
| Author | Jheng, Yu-Ru Mohamed, Mohamed Kuo, Shiao-Wei |
| Abstract | In this study, we synthesized a triphenylamine-functionalized polytyrosine (PTyr-TPA) through living ring opening polymerization with 4,4′-diamino-4″-methoxytriphenylamine (TPA-NH2) as an initiator, and used Fourier transform infrared (FTIR) and nuclear magnetic resonance spectroscopy to confirm the chemical structure. Photoluminescence spectroscopy revealed the photophysical properties of TPA-NH2 and PTyr-TPA and suggested that TPA-NH2 exhibited aggregation-caused quenching; in contrast, attaching the initiator to the rigid rod conformation of the PTyr segments caused PTyr-TPA to display aggregation-induced emission behavior. Differential scanning calorimetry revealed single glass transition temperatures for miscible PTyr-TPA/P4VP blends, the result of intermolecular hydrogen bonding between the pyridine units of P4VP and the phenolic OH units of PTyr-TPA, as confirmed through FTIR spectroscopic analyses. Furthermore, the chain behavior of PTyr-TPA transformed from a β-sheet conformation to random coils after blending with P4VP, as determined using wide-angle X-ray diffraction. These findings suggest that the decreased emission intensity of PTyr-TPA resulted from release of the restricted intramolecular rotation of the triphenylamine moiety in the polypeptide center. |
| File Size | 3903488 |
| File Format | |
| e-ISSN | 20734360 |
| DOI | 10.3390/polym9100503 |
| Journal | Polymers |
| Issue Number | 10 |
| Volume Number | 9 |
| Language | English |
| Publisher Date | 2017-10-12 |
| Access Restriction | Open |
| Subject Keyword | Supramolecular Interaction polypeptides aggregation-induced emission polymer blend secondary structure |
| Content Type | Text |
| Resource Type | Article |
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