Synthesis, Structures And Properties Of The Complexes Constructed From Amino Acid Derivates

Chiral coordination architectures are currently attracting considerable attention becauseof their potential utility in enantioselective catalysis and enantiomer separation, nonlinearoptical （NLO） applications, magnetism, and ferroelectric properties. Complexes of chiralamino acids and their derivatives, in the synthesis of a great deal of flexibility and goodcomplexation, has become a research hotspot of chemical workers. Introduction of an aminoacid moiety in MOFs can induce the intrinsic chirality of the preferred starting amino acid inan extended structure via a versatile bridging mode of the oxygen atom from the aminocarboxylate group. A series coordination compounds constructed by N-acety-L-leucine and（+）-N-Tosyl-L-glutamic acid were synthesized and their crytal structures and properties weredetermined. In this paper, the main results are as follows:[Cu₂（acleu）₂（phen）₂（H₂O）₂]（ClO₄）₂·（H₂O）（1），[Cu₂（acleu）₂（2,2’-bipy）₂（H₂O）₂]（ClO₄）₂（2），{[Cu₂（acleu）₂（2,4’-bipy）4（H₂O）]（ClO₄）₂}n（3），{[Cu（acleu）（4,4’-bipy）（H₂O）]（ClO₄）}n（4），[Ni（tsgluO）（bpe）（H₂O）₂]n（5），[Co₄（tsgluO）4（bpe）4（H₂O）₄]n（6），[Cu（HtsgluO）₂（bpe）]n（7），[Cu（HtsgluO）₂（bpp）]n（8）（Hacleu=N-acety-L-leucine, phen=1,10-phenanthroline monohydrate,2,2’-bipy=2,2’-bipyridine,2,4’-bipy=2,4’-bipyridine,4,4’-bipy=4,4’-bipyridine,H₂tsgluO=（+）-N-Tosyl-L-glutamic acid, bpe=1,2-bis（4-pyridyl）methane,bpp=1,3-bis（4-pyridyl）propane） have been synthesized and characterized by elementalanalysis, IR, thermal analysis, and X-ray diffraction analysis. Compounds1-4magnetismproperties were also studied.Compounds1-8are chiral complexes, compound1and2both are dinuclear molecules.Compound1crystallized in the Orthorhombic space group is C2221, forming2D architectureby hydrogen bounds; Compound2crystallized in the acentric monoclinic space group isP212121, forming3D supramolcular networks though hydrogen bounds. Compounds3and4both crystallize in the Triclinic space group P1and compound3extends as1D chains by thecarboxyl groups of the acleu-adopt a bridging bidentate mode, forming2D supramolcularnetworks though hydrogen bounds. Compound4form a2D layer is bridged by acleu-and 4,4’-bipy. Compounds5and6both crystallize in the Triclinic space group P1. Compounds7and8crystallize in the Orthorhombic space group P212121. The1D chain architecture ofcompounds5,7,8are further connected by hydrogen bonds interactions to form3Dsupramolecular network. Compound6form3D networks structure though tsgluO2-and bpe.The magnetic susceptibility studies of compounds1and3show antiferromagneticinteractions, but compounds2and4indicated that of the compounds show ferromagneticinteractions.