Please use this identifier to cite or link to this item: https://doi.org/10.1021/acs.chemmater.0c02277
Title: Aggregation-Induced Emission-Responsive Metal-Organic Frameworks
Authors: Dong, Jinqiao 
Shen, Pingchuan
Ying, Shaoming
Li, Zi-Jian
Yuan, Yi Di
Wang, Yuxiang
Zheng, Xiaoyan
Peh, Shing Bo 
Yuan, Hongye 
Liu, Guoliang 
Cheng, Youdong 
Pan, Yutong 
Shi, Leilei
Zhang, Jian
Yuan, Daqiang
Liu, Bin 
Zhao, Zujin
Tang, Ben Zhong
Zhao, Dan 
Keywords: Science & Technology
Physical Sciences
Technology
Chemistry, Physical
Materials Science, Multidisciplinary
Chemistry
Materials Science
TURN-ON FLUORESCENCE
UP-CONVERSION
MOLECULAR ROTORS
LUMINESCENCE
SIZE
NANOSHEETS
VISCOSITY
ROTATION
WEIGHT
DESIGN
Issue Date: 11-Aug-2020
Publisher: AMER CHEMICAL SOC
Citation: Dong, Jinqiao, Shen, Pingchuan, Ying, Shaoming, Li, Zi-Jian, Yuan, Yi Di, Wang, Yuxiang, Zheng, Xiaoyan, Peh, Shing Bo, Yuan, Hongye, Liu, Guoliang, Cheng, Youdong, Pan, Yutong, Shi, Leilei, Zhang, Jian, Yuan, Daqiang, Liu, Bin, Zhao, Zujin, Tang, Ben Zhong, Zhao, Dan (2020-08-11). Aggregation-Induced Emission-Responsive Metal-Organic Frameworks. CHEMISTRY OF MATERIALS 32 (15) : 6706-6720. ScholarBank@NUS Repository. https://doi.org/10.1021/acs.chemmater.0c02277
Abstract: Although many studies on luminescent metal-organic frameworks (MOFs) have been reported for chemical sensing applications, it has yet to be realized in MOFs the precise linearity control over photophysical characteristics and sensing sensitivity at the molecular level for a fundamental understanding of the structure-property relationships. Here we demonstrate the first example of aggregation-induced emission (AIE)-responsive MOFs with precise linearity control of photophysics and chemical sensing. We employ a multivariate strategy to tune the number of AIE molecular rotors (dynamic phenyl rings) in a MOF system by varying the ratio of tetraphenylethylene (TPE)-based organic linker, leading to highly tunable photophysical characteristics (e.g., maximum emission peak, quantum yield, and optical band gap) featuring linear correlations with linker content. Importantly, the sensing sensitivity of these dynamic MOFs can be enhanced by increasing the number of AIE molecular rotors with perfect linearity control, as systematically investigated by fluorescence responsive to temperature, viscosity, guest molecular size, as well as theoretical calculations. Our study shows that the sensing sensitivity of the AIE-responsive MOF in this study (termed as NUS-13-100%) is better than those of our previously reported materials. Significantly, the observed linear relationship between emission intensity and molecular weight of polystyrene as the analyte suggests that such AIE-responsive MOFs could be used as molecular sensors for fluorescence-based determination of polymer molecular weight. Eventually, the optical sensing device containing NUS-13-100% shows a perfect linearity response with high sensitivity for the detection of trace toxic benzene vapor. In short, our work paves the way toward porous MOFs containing AIE molecular rotors with a versatile responsive emission mechanism and suitable pore size/geometry for broad applications in chemical sensing and environmental monitoring.
Source Title: CHEMISTRY OF MATERIALS
URI: https://scholarbank.nus.edu.sg/handle/10635/215216
ISSN: 08974756
15205002
DOI: 10.1021/acs.chemmater.0c02277
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