Fingerprint Detection By Metal Organic Framework （MOF） Resulted From Eu₂（bdc）₃ Or Tb₂（bdc）₃

The history of fingerprinting technology has been more than 100 years.Through the exploration of researchers,they have achieved rich achievements.With the development of basic science and the links between different disciplines become increasingly close,new methods and ideas are constantly appearing in the field of fingerprints,it expanding the system of fingerprints greatly.This paper explores the potential of metal organic frameworks（MOF）in the field of fingerprint development.Metal organic frameworks（MOF）are crystalline porous materials with regular pores or pore structures constructed by complexation of inorganic metal centers with organic functional groups.It has been developed rapidly since the development of this material,and it is widely used in many fields such as gas storage,catalysis,and fluorescent materials.This paper mainly explores the application of MOFs（Eu₂（bdc）₃ and Tb₂（bdc）₃）in the fingerprints detection.Firstly,the conditions of developing fingerprints with MOFs were investigated.Specifically,when the concentration ratio of rare earth ion solution to organic ligand solution is 0.01 mol/l:0.02 mol/l,0.01 mol/l:0.03 mol/l,0.02 mol/l:0.02 mol/l,0.02 mol/l:0.03mol/l,the sebaceous fingerprints left on the glass can be detected.The experiment was carried out at 25℃and the reaction time is about 30 seconds.This paper also used MOFs to develop fingerprints left on different objects.Specifically,it has a good effect on the fingerprints of fresh and grease left on most non-porous,semiporous objects.At the same time,it is also concluded that different objects lead to different reaction time,and the reference time in the paper is 15s-45s.This paper also used MOFs to develop fingerprints that left on several objects with different residual time.It is found that for most of the objects,it has a good effect when residual time of the fingerprint less than 1 months.Finally,the paper also compares the MOFs with the fluorescent powder,and the small particle suspension method.The effect is ideal.