Fo euro rster resonance energy transfer-based molecularly imprinted polymer/amine-functionalized metal-organic framework nanocomposite for trace level detection of 4-nitrophenol

Herein, luminescent metal-organic framework (LMOF) is modified with molecularly imprinted polymer (MIP) and employed as an efficient and cost-effective nanoprobe for the determination of 4-nitrophenol (4-NP). Amine-UiO-66 support with unique luminescence property is chosen for creating the template of 4-NP using MIP to construct a highly selective LMOF-based sensor (amine-UiO-66/MIP nanocomposite). The imprinted sites formed at the surface of LMOF significantly enhance the selectivity of the probe for 4 NP over its analogs. 4-NP can effectively quench the fluorescent intensity of the optical sensor via the Fo euro rster resonance energy transfer (FRET) mechanism. Amine-UiO-66/MIP sensor provided the linear range of 0.05e50 mM and low limit of detection of 0.009 mM for sensing of 4-NP. The application of probe for the fluorometric analysis of real samples, including drinking and environmental water, provided satisfactory recovery results with low relative standard deviation (RSD). (c) 2022 Elsevier B.V. All rights reserved.