Design and Synthesis of Donor−σ–π–σ–Acceptor-Type Dispiro Molecules
| Autor: | Zuo-Quan Jiang, Xiang-Dong Zhu, Tong-Tong Wang, Shuang-Qiao Sun, Hong-Cheng Li, Liang-Sheng Liao, Wei Luo, Man-Keung Fung, Aziz Khan |
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| Rok vydání: | 2019 |
| Předmět: |
010405 organic chemistry
Chemistry Organic Chemistry Intermolecular force Charge (physics) 010402 general chemistry 01 natural sciences Biochemistry Acceptor 0104 chemical sciences Crystallography Intramolecular force Molecule Quantum efficiency Thermal stability Physical and Theoretical Chemistry Phosphorescence |
| Zdroj: | Organic Letters. 21:5281-5284 |
| ISSN: | 1523-7052 1523-7060 |
| DOI: | 10.1021/acs.orglett.9b01884 |
| Popis: | Two novel donor-σ-π-σ-acceptor-type dispiro molecules-10-phenyl-10H-dispiro-acridine-9,9'-anthracene-10',9''-fluorene-2'',7''-dicarbo-nitrile (DiSAAF) and dispiro-fluorene-9,9'-anthracene-10',9''-quinolino[3,2,1-kl]phenoxazine-2,7-dicarbonitrile (DiSFAQ)-with excellent thermal stability are designed and synthesized. Both materials exhibit blocked long-range intramolecular charge transfer but show intermolecular charge-transfer emission in the film state. Their photophysical and thermal properties then are fully investigated and a maximum external quantum efficiency of 21.7% of the red phosphorescent device is achieved by DiSAAF. |
| Databáze: | OpenAIRE |
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