Terpyridine-based donor–acceptor metallo-supramolecular polymers with tunable band gaps: Synthesis and characterization
| Autor: | Zhiwei Hu, Jiawei Hu, Lin Liu, Jie Li, Xuegang Chen, Hongbing Qiao, Fanchao Li |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
Materials science Band gap Carbazole Process Chemistry and Technology General Chemical Engineering 02 engineering and technology Polymer 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences 0104 chemical sciences Supramolecular polymers chemistry.chemical_compound chemistry Polymerization Intramolecular force Terpyridine Absorption (chemistry) 0210 nano-technology |
| Zdroj: | Dyes and Pigments. 132:142-150 |
| ISSN: | 0143-7208 |
| DOI: | 10.1016/j.dyepig.2016.04.031 |
| Popis: | Three new building blocks containing the electron-donor fused-ring motifs carbazole, dithienosilole (DTS) and dithienopyrrole (DTP) and the 2,2′:6′,2″-terpyridine electron-acceptor motif were designed and synthesized. Directed by transition metal ions, the self-assembly of the building blocks triggered polymerization to form the corresponding metallo-supramolecular polymers PCzTPY , PSiTPY and PNTPY , respectively. The UV–vis absorption maxima of the building blocks occur at long wavelengths (351, 368 and 430 nm for CzTPY , SiTPY and NTPY , respectively), which arises from intramolecular charge transfer (ICT) transitions. However, the absorption maxima of their corresponding metallo-supramolecular polymers are clearly red-shifted (to 394, 431 and 509 nm for PCzTPY , PSiTPY and PNTPY , respectively), which is caused by the incorporation of the transition metal ion into the backbones of the target polymers. Based on the above strategies, the resulting metallo-polymers exhibit reduced energy gaps, which are 2.07, 1.97 and 1.56 eV for the PCzTPY , PSiTPY and PNTPY metallo-supramolecular polymers, respectively. |
| Databáze: | OpenAIRE |
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