| Title: | Ultrathin two-dimensional porous organic nanosheets with molecular rotors for chemical sensing |
| Author(s): | Dong J; Zhang K; Li X; Qian Y; Zhu H; Yuan D; Xu QH; Jiang J; Zhao D; |
| Address: | "Department of Chemical & Biomolecular Engineering, National University of Singapore, Singapore, 117585, Singapore. Department of Chemistry, National University of Singapore, Singapore, 117543, Singapore. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou, 350002, China. Department of Chemical & Biomolecular Engineering, National University of Singapore, Singapore, 117585, Singapore. chezhao@nus.edu.sg" |
| DOI: | 10.1038/s41467-017-01293-x |
| ISSN/ISBN: | 2041-1723 (Electronic) 2041-1723 (Linking) |
| Abstract: | "Molecular rotors have played an important role in recent materials chemistry. Although several studies on functional materials containing molecular rotors have been reported for fluorescence sensing, this concept has yet to be realized in two-dimensional (2D) materials. Here we report the preparation of all-carbon, pi-conjugated 2D porous organic nanosheets, named NUS-24, which contain flexible tetraphenylethylene (TPE) units as the molecular rotors. NUS-24 nanosheets exhibit high stability, large lateral size, and ultrathin thickness (2-5 nm). The dynamic TPE rotors exposed on the surface of NUS-24 nanosheets can be restricted in the aggregated state with different water fractions, which is reminiscent of the aggregation-induced emission mechanism, thereby leading to the size-selective turn-on fluorescence by volatile organic compounds. Significantly, the ultrathin 2D nanosheets and its composite membranes show much higher sensitivity and selectivity toward Fe(3+) ions and nitro-containing compounds sensing, suggesting their potential applications in explosive detection and environmental monitoring" |
| Notes: | "PubMed-not-MEDLINEDong, Jinqiao Zhang, Kang Li, Xu Qian, Yuhong Zhu, Hai Yuan, Daqiang Xu, Qing-Hua Jiang, Jianwen Zhao, Dan eng Research Support, Non-U.S. Gov't England 2017/10/27 Nat Commun. 2017 Oct 26; 8(1):1142. doi: 10.1038/s41467-017-01293-x" |
