Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 11, Issue 18, Pages 16490-16495Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b22327
Keywords
metal-organic frameworks (MOFs); dye encapsulation; one-step approach; intrinsic proton conduction; aniline detection
Funding
- National Natural Science Foundation of China [21573042, 21673039, 21805039]
- Fujian Science and Technology Department [2018J07001, 2016J01046]
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The encapsulation of dyes into metal-organic frameworks (MOFs) has generated a variety of platforms for luminescence, but little attention has been paid to their application in proton conduction. Here, a cationic MOF {{[In3OL1.5(H2O)(3)](NO3)}center dot(DMA)(3)center dot(CH3CN)(6)center dot(H2O)(30)}(n) (FJU-10, H4L = 4,4',4 '',4 '''-(1,4-phenylenbis(pyridine-4,2,6-triyl))-tetrabenzoic acid, DMA = N,N-dimethylacetamide) was synthesized, and the dye molecule 8-hydroxy-1,3,6-pyrenetrisulfonic acid trisodium salt (HPTS) was further added to the MOF growth solution, but during the reaction, HPTS was nitrated and nitrated HPTS was encapsulated into the FJU-10 to obtain dye@FJU-10. As a result, the intrinsic proton conductivity of dye@FJU-10 is nearly 5 times higher than that of FJU-10 at 90 degrees C. Dye@FJU-10 exhibits more sensitive fluorescence quenching toward aniline than FJU-10 in DMF solution (the detection limits of FJU-10 and dye@FJU-10 are as low as 0.58 and 0.62 mu M, respectively). Here, it is demonstrated for the first time that intrinsic proton conductivity can be effectively improved by encapsulating a nitrated HPTS dye into an MOF.
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