Cooperative supramolecular polymerization of a perylene diimide derivative and its impact on electron-transporting properties
| Autor: | Deep Sankar Pal, Dipankar Basak, Shu Seki, Satoru Yoneda, Suhrit Ghosh, Tsuneaki Sakurai |
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| Rok vydání: | 2017 |
| Předmět: |
inorganic chemicals
chemistry.chemical_classification Chemistry Carboxylic acid Supramolecular chemistry General Physics and Astronomy 02 engineering and technology Conductivity 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences nervous system diseases 0104 chemical sciences body regions chemistry.chemical_compound Monomer Decalin Polymerization Diimide Polymer chemistry Physical and Theoretical Chemistry 0210 nano-technology Perylene |
| Zdroj: | Physical chemistry chemical physics : PCCP. 19(46) |
| ISSN: | 1463-9084 |
| Popis: | H-bonding-promoted supramolecular polymerization of a perylene diimide (PDI) building block and its impact on charge carrier mobility were studied. PDI-1, containing a carboxylic acid group, exhibits H-aggregation in a non-polar solvent decalin while in THF or chloroform it remains in the monomeric form. In contrast, the control molecule PDI-2, containing an ester group does not show aggregation even in decalin, indicating that H-bonding among the carboxylic acid is primarily responsible for H-aggregation, which is further verified by the FT-IR study. A variable temperature UV/Vis study establishes a cooperative pathway for the supramolecular polymerization of PDI-1. Microscopy images show a short fibrillar morphology. Flash-photolysis time-resolved microwave conductivity (FP-TRMC) measurements reveal significantly higher electrical conductivity for the PDI-1 film prepared from decalin compared with that prepared from THF/MeOH or the film of non-aggregated PDI-2 prepared from decalin. By combining the transient absorption spectroscopy data (that estimate the charge carrier generation efficiency) and the TRMC evaluated conductivity, the 1D charge carrier mobility of PDI-1 (μe,1D) is estimated to be 0.24 cm2 V−1 s−1, which is among the top values reported for any PDI derivative measured using the same technique. |
| Databáze: | OpenAIRE |
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