期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 22, 期 20, 页码 6768-6773出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201601199
关键词
boronic acid; condensation; covalent organic frameworks (COFs); photoisomerization; STM
资金
- National Science Foundation of China [21373070, 21572157]
- Open Project of State Key Laboratory of Robotics and System (HIT) [SKLRS-2015-MS-11]
By introducing an azobenzene group to the backbone of diboronic acid, we have obtained a surface-confined, photoresponsive single-layer covalent organic framework with long-range order and almost entire surface coverage. Scanning tunneling microscopic characterization indicates that though the covalent linkage provides a significant locking effect, isomerization can still happen under UV irradiation, which causes destruction of the surface COF. Furthermore, the decomposed surface COF can recover upon annealing. This photoinduced decomposition provides a facile approach for the controlled capture and release of targeted objects using these nanoporous surface COFs as a host, which has been demonstrated in this work using copper phthalocyanine as a model guest.
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