Design,Synthesis And Fluorescent Properties Of Tetraphenylethylene Compounds And Complexes

Metal ions and some organic molecules play an important role in people's environment and human health,they are closely related to human health.Some of these substances are highly toxic,others participate in the normal physiological process of the human body,so they are an essential part of the human body.Therefore,it has become a core part of the detection to find a way to detect these substances with high selectivity and no damage to test sample.Among all detection methods,fluorescent molecular probes have been widely used in the fields of environmental,medical,material and biological because of their advantages such as low cost,high sensitivity and simple operation.Because of these advantages of fluorescent molecular probes,tetraphenylethylene compounds,as a new type of organic molecules with luminescent characteristics appear in the field of vision of scientists.For this purpose,three tetraphenylethylene compounds were synthesized in oxygen-free environment,and their fluorescence sensing properties for metal ions and small molecules(nitro compounds,diamines,diphenols)were studied.The results show that Fe3+ and TNP can be detected in the order of 100 ?M,and the compounds have high sensitivity to 2,4,6-trinitrophenol(TNP)(Ksv = 2.54×106 and 6.34×105 M-1)and better selectivity.Four indium complexes were synthesized by hydrothermal method with InCl3 as metal source and organic molecules as ligand.The fluorescence sensing properties in the presence of vitamin B1 were discussed,the mechanism of fluorescence sensing between them was analyzed.Some compounds were characterized by IR,UV-Vis,X-ray diffraction,PXRD and elemental analysis.The compounds and complexes reported in this paper:1,1,2,2-tetrakis(4-bromophenyl)ethane(1)4,4',4",4'"-(ethene-1,1,2,2-tetrayl)tetrabenzoic acid(2)4',4'",4"",4""",-(ethene-1,1,2,2-tetrayl)tetrakis([1,1 '-(3)biphenyl]-4-carboxylic acid)[InCl2(Hphth)(H2L)0.5(H2O)].2H20(4)[InCl4(HL)(H20)](5)[InCl(Hphth)(nia)(H2O)2](6)[InCl(Hnia)2(Hox)2]·3H2O(7)Note:H2ghth = phthalic acid;H2L = 4,4'-bipyridine;Hnia = nicotinic acid;H2oX = oxalic acid...