One-Pot Synthesis of a Magnetic, Ratiometric Fluorescent Nanoprobe by Encapsulating Fe3O4 Magnetic Nanoparticles and Dual-Emissive Rhodamine B Modified Carbon Dots in Metal-Organic Framework for Enhanced HClO Sensing

Yujie Ma; Guanhong Xu; Fangdi Wei; Yao Cen; Xiaoman Xu; Menglan Shi; Xia Cheng; Yuying Chai; Muhammad Sohail; Qin Hu

doi:10.1021/acsami.8b05643

One-Pot Synthesis of a Magnetic, Ratiometric Fluorescent Nanoprobe by Encapsulating Fe₃O₄ Magnetic Nanoparticles and Dual-Emissive Rhodamine B Modified Carbon Dots in Metal-Organic Framework for Enhanced HClO Sensing

ACS Appl Mater Interfaces. 2018 Jun 20;10(24):20801-20805. doi: 10.1021/acsami.8b05643. Epub 2018 Jun 11.

Authors

Yujie Ma¹, Guanhong Xu¹, Fangdi Wei¹, Yao Cen¹, Xiaoman Xu¹, Menglan Shi¹, Xia Cheng¹, Yuying Chai¹, Muhammad Sohail¹, Qin Hu¹

Affiliation

¹ School of Pharmacy , Nanjing Medical University , Nanjing , Jiangsu 211166 , PR China.

PMID: 29856924
DOI: 10.1021/acsami.8b05643

Abstract

In this work, a new magnetic, ratiometric fluorescent nanoprobe has been designed and fabricated by encapsulating Fe₃O₄ magnetic nanoparticles (MNPs) and dual-emissive carbon dots into the cavities of metal-organic frameworks (MOFs). This one-pot method combined hybrid characteristics of MOFs with multiple properties of the encapsulated functional materials. The MOF-based nanoprobe possessed the advantages of MOFs (strong adsorption ability, accumulating the analytes), Fe₃O₄ MNPs (magnetic separation), and ratiometric sensors (eliminating the variabilities caused by the instability of the instruments and environment). The MOF-based nanoprobe was dispersible and stable in aqueous solution, and the nanoprobe was applied to HClO sensing. This work will provide a promising strategy for design and synthesis of novel MOF-based composite materials.

Keywords: Fe3O4 magnetic nanoparticles; HClO; dual-emissive carbon dots; metal−organic frameworks; ratiometric fluorescence.