Application of lanthanide series metal coordination polymer solution and solid powder in extracting latent fingerprints

Abstract

The invention relates to application of a lanthanide series metal coordination polymer solution and solid powder in extracting latent fingerprints. The synthetic method is simple, large-quantity synthesis is easy, and latent fingerprints of different individuals and surfaces of different objects can be shown. Nanoparticles of a lanthanide series metal coordination polymer have close combination with fingerprint lines and poor combination with other areas, and thus the showing result is accurate; the nanoparticles of the lanthanide series metal coordination polymer can be operated in different media, and thus have practicability on surfaces without pores or porous surfaces; fingerprint effects can be directly observed with naked eyes without any instruments, fingerprint effect pictures can be clearly recorded with a common digital camera, and thus comparison and storage are convenient; synthetic materials are cheap, and compared with a traditional product, a product of the lanthanide series metal coordination polymer solution and solid powder is environmentally friendly, safe and free of toxicity or smells, and does not harm an operator in any way.

Description

Technical field: [0001] The invention belongs to the field of nanomaterial preparation technology and its application as a fluorescence sensor in analysis and detection technology, and specifically relates to the application of lanthanide metal coordination polymer solution and solid powder in latent fingerprint extraction. Background technique: [0002] Nano-luminescent materials are widely used in the field of fluorescent marking due to their unique optical characteristics and nano-size effects. In recent years, they have been rapidly developed as fluorescent sensors for the rapid display of latent fingerprints in criminal investigation scenes. The reported nano-luminescent materials for fingerprint display are mostly rare-earth ion-doped luminescent materials and semiconductor quantum dots composed of II-VI elements. [0003] In 2011, the University of Technology Sydney, Australia reported for the first time that rare earth ion-doped up-conversion luminescent materials we...

AI Technical Summary

Problems solved by technology

[0004] Most of the existing methods for extracting fingerprints are to collect the surface of the object with fingerprints on the spot, and then bring them under certain conditions to observe and extract fingerprints. The time required for extracting fingerprints is long and the efficiency of extracting fingerprints is low; The fingerprint method can only display potential fingerprints on the surface of non-porous objects, and the effect of displaying fingerprints on porous or porous object surfaces such as newspapers and wood is poor.

[0005] Due to the high coordination number and variable coordination mode of lanthanide metals in coordination, the design and regulation of coordination polymers of lanthanide metals are more difficult than transition metals, although lanthanide metals Organic frameworks have outstanding potential applications in catalysis. However, in fact, the research on lanthanide metal-organic frameworks today is mainly focused on their synthesis and structural characteristics, and there are still few studies on their dynamic properties.

In addition, the magnetic behavior of lanthanide metals is more complex than that of transition metal elements. Although they also show better properties in many cases, they cannot be combined with the structure of coordination polymers to make a reasonable explanation in many cases, which also gives Development of theory of magnetism in coordination polymers of lanthanide metals poses new challenges

[0006] Most of the existing lanthanide metal coordination polymers are used as sensors by taking advantage of their optical and magnetic properties, and by using their chemical coupling or specific physical adsorption to biomolecules including proteins, oils and amino acids, they can also There is no research, so exploring the adsorption of lanthanide metal coordination polymers to biomolecules is a problem to be solved in the research of coordination polymers

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