Synthesis, Characterization And Fluorescent Properties Of The Complexes Based On Amino Acid Derivates

In recent years, coordination polymers have attracted extensive attention not only due totheir intriguing topologies and diverse structures but also owing to their interesting physicaland chemical properties, such as photoluminescence, gas storage, magnetism, catalysis, andion exchange, etc. Amino acid derivatives contain both carboxyl and amino groups, andexhibit excellent coordination ability. Furthermore, coordination polymers based on metalions with d10electronic configuration and rare metal ions have been an area of intenseresearch, primarily due to photoluminescence. Therefore, a series of coordination polymersconstructed by ligands (+)-N-Tosyl-L-glutamic acid (H2tsgluO)，N-acetyl-L-tyrosine (Hacty)and metal ions with d10electronic configuration， rare metal ions have been synthesized, andtheir crystal structures and fluorescent properties were determined. In this paper, the mainresults are as follows:First, six coordination compounds constructed by (+)-N-Tosyl-L-glutamic acid,N-acetyl-L-tyrosine and d10metal ions:[Cd(tsgluO)(Him)(H2O)]n(1)[Cd2(tsgluO)2(3-ampy)5]n·4nH2O (2)[Ag2(HtsgluO)2(2,4’-bipy)4]2H2O (3)[Ag(HtsgluO)(bpe)]n(4)[Zn2(acty)2(bpp)2(O)]n3.5nH2O (5)[Cd(acty)(2,4’-bipy)2(NO3)(H2O)2]2H2O(6)(H2tsgluO=(+)-N-Tosyl-L-glutamic acid, Hacty=N-acetyl-L-tyrosine, Him=imidazole,3-ampy=3-aminopyridine,2,4’-bipy=2,4’-bipyridyl, bpe=1,2-bis(4-pyridyl)methane,bpp=1,3-bis(4-pyridyl)propane) have been synthesized and characterized by elementalanalysis, infrared spectra, thermal analysis, powder diffraction and X-ray diffraction analysis.Compound1crystallizes in the monoclinic chiral space group P2(1) and features aladder-like one-dimensional double-chain structure, which are further extended into atwo-dimensional supramolecular architecture through hydrogen bonding interactions.Compound2crystallizes in the monoclinic space group C2/c and features a one-dimensional double helix chain structure. The dinuclear complex3crystallizes in the triclinic space groupP1, which are connected by intermolecular hydrogen bonds resulting in the formation of2Dlayers. Compounds4and6crystallize in the monoclinic chiral space group P2(1), compound4generates1D linear single-chain structure, and compound6is a single molecule structure,which further linked into3D supramolecular structure via hydrogen bond. Compound5crystallizes in the triclinic chiral space group P1and features a one-dimensional double-chain,these1D double chains are further extended into a two-dimensional supramoleculararchitecture through hydrogen bonding interactions. Fluorescent properties of compounds1-6at room temperature were studied. Results of luminescent studies of compounds1-6indicatethat they are all potential fluorescent materials.Second, three coordination compounds constructed by (+)-N-Tosyl-L-glutamic acid andrare metal ions:[Eu2(tsgluO)3(H2O)4]n4nH2O (7)[Eu2(tsgluO)3(1,10-phen)2(H2O)]n2nH2O (8)[Tb2(tsgluO)3(1,10-phen)2(H2O)]n2nH2O (9)(H2tsgluO=(+)-N-Tosyl-L-glutamic acid,1,10-phen=1,10-phenanthroline) have beensynthesized and characterized by elemental analysis, infrared spectra, thermal analysis,powder diffraction and X-ray diffraction analysis.Compounds7,8and9crystallizes in the triclinic space group P-1, compound7featuresa2D network, compounds8and9are isostructural and exhibit the same1D infinite chain.Additionally, fluorescent properties study indicates that complex8and9show characteristictransitions of Eu3+and Tb3+, respectively.