期刊
ACS APPLIED MATERIALS & INTERFACES
卷 14, 期 36, 页码 41178-41185出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.2c0949741178
关键词
metal-organic frameworks; luminescence sensor; white-light emission; temperature sensor; DMF sensor
资金
- Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy [NSF/CBET-1706632, DE-AC02-05CH11231]
Rare-earth metal-organic frameworks (RE-MOFs) are a promising platform for constructing luminescent materials. The designed RE-MOFs in this study showed excellent thermal and chemical stability, making them potential candidates for applications in white-light emission and temperature-DMF sensing.
Rare-earth metal-organic frameworks (RE-MOFs) are an attractive platform to construct luminescent materials for practical applications in lighting, optoelectronics, and sensing. By adjusting the metal composition in mixed RE-MOFs, one can not only realize tunable emission but also construct ratiometric luminescent sensors. As such, it is highly desirable to prepare robust RE-MOFs that display efficient, multifunctional sensing capability. In this work, we designed and synthesized a series of RE-MOFs that exhibit both excellent thermal and chemical stability due to the incorporation of a bulky tert-butyl group on a new carbazole-based ligand. By rationally tuning the molar ratio of Eu3+/Tb3+/Y3+, a white-light-emitting MOF was developed as an excellent thermal sensor that exhibits a temperature-induced ratiometric luminescence response between 278 and 378 K. After removing the coordinated solvent molecules via thermal treatment, the desolvated MOF materials exhibit excellent turn-on or color change sensitivity to recognize dimethylformamide (DMF) molecules. Such high sensitivity is attributed to the DMF coordination that induces the framework structure change and shifts the ligand's excited-state energy level to facilitate the ligand-to-metal energy transfer process. Taking together, NPF-700-RE represents a new class of robust, tunable luminescent materials that have great potential in white-light emission and thermal-and DMF-sensing applications.
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