Composite fiber based on luminescent metal organic frame material and preparation method thereof, and application to multi-parameter distributed fiber fluorescence sensing system

Abstract

The invention discloses a composite fiber based on a luminescent metal organic frame material and a preparation method thereof, and an application to a multi-parameter distributed fiber fluorescence sensing system. The system includes an excitation light source, a fiber coupler, a delay fiber, sensing units, a long pass filter, a fluorescence spectrometer and a signal processing unit, wherein thesensing unit is a luminescent MOFs composite fiber prepared through a casing method, and the multi-parameter distributed fiber fluorescence sensing network can be formed by cascading and paralleling the multiple sensing units containing different luminescent MOFs. The system is advantaged in that composition of the luminescent MOFs and the fibers is realized, the method is simple, cost is low, thesensing units for detecting different analytes can be prepared according to actual needs and are combined with other optical instrument components to form a sensing system, further real-time in-situremote online fluorescence detection and sensing are realized simultaneously at multiple points, and the sensing application of the illuminating MOFs is greatly improved.

Description

technical field [0001] The invention belongs to the field of optical fiber fluorescence sensing, in particular to a metal-organic frame material-based composite optical fiber and a multi-parameter distributed optical fiber fluorescence sensing system. Background technique [0002] Metal-Organic Frameworks (MOFs) is a new type of porous crystal material formed by using organic ligands as bridging structures and metal ions (clusters) as linking points, and the two are connected by coordination bonds. Its huge specific surface area and predictable network topology have broad application prospects in the fields of separation, catalysis, and hydrogen storage. Among them, luminescent metal-organic framework materials have rich electronic structures and excellent photophysical properties (such as narrow emission lines and high luminous efficiency), which will generate fluorescence under the action of external excitation light, and have fast response speed, With the advantages of h...

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Problems solved by technology

However, due to the complex method of integrating luminescent MOFs on optical fibers and the difficulty of preparation, there are not many reports on this application.

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