Please use this identifier to cite or link to this item: https://doi.org/10.1038/s41467-017-01293-x
Title: Ultrathin two-dimensional porous organic nanosheets with molecular rotors for chemical sensing
Authors: DONG JINQIAO 
ZHANG KANG 
LI XU 
QIAN YUHONG 
Zhu, Hai
Yuan, Daqiang
XU QINGHUA 
JIANG JIANWEN 
Zhao Dan 
Keywords: Science & Technology
Multidisciplinary Sciences
Science & Technology - Other Topics
AGGREGATION-INDUCED EMISSION
GRAPHENE NANORIBBONS
UNIDIRECTIONAL ROTATION
VAPOR-DEPOSITION
LIVE CELLS
FLUORESCENCE
FRAMEWORKS
VISCOSITY
CRYSTALLINE
FILMS
Issue Date: 26-Oct-2017
Publisher: NATURE PUBLISHING GROUP
Citation: DONG JINQIAO, ZHANG KANG, LI XU, QIAN YUHONG, Zhu, Hai, Yuan, Daqiang, XU QINGHUA, JIANG JIANWEN, Zhao Dan (2017-10-26). Ultrathin two-dimensional porous organic nanosheets with molecular rotors for chemical sensing. NATURE COMMUNICATIONS 8 (1). ScholarBank@NUS Repository. https://doi.org/10.1038/s41467-017-01293-x
Abstract: © 2017 The Author(s). 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, π-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 Fe3+ ions and nitro-containing compounds sensing, suggesting their potential applications in explosive detection and environmental monitoring.
Source Title: NATURE COMMUNICATIONS
URI: https://scholarbank.nus.edu.sg/handle/10635/169838
ISSN: 2041-1723
DOI: 10.1038/s41467-017-01293-x
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