Journal
SENSORS
Volume 19, Issue 1, Pages -Publisher
MDPI
DOI: 10.3390/s19010091
Keywords
cationic pillar[6]arene; host-guest recognition; reduced graphene; trinitrophenol
Funding
- Program for Leading Talents
- Basic Research Project of Science and Technology Commission of Chongqing [cstc2017jcyjAX0031]
- Education Commission of Chongqing [KJ1712298, KJ121307]
- Program for Innovation Team Building at Institutions of Higher Education in Chongqing [CXTDX201601039]
- School Enterprise Innovation Platform [FLKW2017AAA1024]
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We describe a selective and sensitive fluorescence platform for the detection of trinitrophenol (TNP) based on competitive host-guest recognition between pyridine-functionalized pillar[6]arene (PCP6) and a probe (acridine orange, AO) that used PCP6-functionalized reduced graphene (PCP6-rGO) as the receptor. TNP is an electron-deficient and negative molecule, which is captured by PCP6 via electrostatic interactions and pi-pi interactions. Therefore, a selective and sensitive fluorescence probe for TNP detection is developed. It has a low detection limit of 0.0035 mu M (S/N = 3) and a wider linear response of 0.01-5.0 and 5.0-125.0 for TNP. The sensing platform is also used to test TNP in two water and soil samples with satisfying results. This suggests that this approach has potential applications for the determination of TNP.
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