Journal
NATURE COMMUNICATIONS
Volume 4, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms3736
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Funding
- Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT) [24245030]
- NSFC [21128001]
- JST
- JSPS
- IBS (Institute for Basic Science) in Korea [CA1201]
- Ministry of Science, ICT & Future Planning, Republic of Korea [IBS CA1301] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Covalent organic frameworks are a class of crystalline organic porous materials that can utilize pi-pi-stacking interactions as a driving force for the crystallization of polygonal sheets to form layered frameworks and ordered pores. However, typical examples are chemically unstable and lack intrasheet pi-conjugation, thereby significantly limiting their applications. Here we report a chemically stable, electronically conjugated organic framework with topologically designed wire frameworks and open nanochannels, in which the pi conjugation-spans the two-dimensional sheets. Our framework permits inborn periodic ordering of conjugated chains in all three dimensions and exhibits a striking combination of properties: chemical stability, extended pi-delocalization, ability to host guest molecules and hole mobility. We show that the pi-conjugated organic framework is useful for high on-off ratio photoswitches and photovoltaic cells. Therefore, this strategy may constitute a step towards realizing ordered semiconducting porous materials for innovations based on two-dimensionally extended pi systems.
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