Dual-emission ratiometric fluorescent probe based on Uio-66- NH 2 @CQDs for quantitative detection of acetophenone

It is imperative that developing fluorescent probe to detect volatile organic compound such as acetophenone (AP) to protect environment public health protection. In this work, we synthesized a ratiometric Uio-66-NH2@CQDs sensor through post-synthetic modification by anchoring carbon quantum dots onto Uio-66-NH2 metal-organic framework, which could be readily utilized as self-calibrating nanoprobe for selective detection of AP over other potential interferants. Upon the addition of AP, Uio-66-NH2@CQDs featured a decreased emision at 430 nm and an enhanced emission at 550 nm, accompanied by a characteristic fluorescence color transition from blue-green to yellow. By adopting the ration of I430nm/I550nm as the detection signal, Uio-66-NH2@CQDs could distinguish AP with excellent performance. The limit of detection for AP was estimated to be 175.6 nM, which was a significant value. Additionally, we demonstrated that on-site visual inspection of AP in industrial wastewater using a paper-based Uio-66-NH2@CQDs analysis device.