Ten coordination compounds constructed by 4′-((2-carboxyphenoxy)methyl)biphenyl-2-carboxylic acid and various N-donor ligands: Syntheses, structures and luminescent properties

Structurally Distinct Metal–Organic and H-Bonded Networks Derived from 5-(6-Carboxypyridin-3-yl)isophthalic Acid: Coordination and Template Effect of 4,4′-Bipyridine

“…Eight-coordinate Cd1 center displays a distorted dodecahedral {CdN 2 O 6 } environment filled by six O atoms from four different μ 2 -H 2 L – blocks and two N atoms from two μ 2 -H 2 L – linkers (Figure a). The Cd–O bond distances vary from 2.406(4) to 2.477(3)­Å, whereas the Cd–N distances are 2.355(4)­Å; these bonding parameters agree with those encountered in previously reported Cd­(II) derivatives. ,,, In 1 , H 2 L – behaves as a μ 2 -linker (mode I, Scheme ), with the COOH and COO groups showing the η 1 :η 0 monodentate and η 1 :η 1 bidentate modes, respectively. In H 2 L – , the dihedral angle between the two aromatic rings is 25.54°.…”

“…The Cd−O bond distances vary from 2.406(4) to 2.477(3)Å, whereas the Cd−N distances are 2.355(4)Å; these bonding parameters agree with those encountered in previously reported Cd(II) derivatives. 2,27,48,63 In 1, H 2 L − behaves as a μ 2 -linker (mode I, Scheme 4), with the COOH and COO groups showing the η 1 :η 0 monodentate and η 1 :η 1 bidentate modes, respectively. In H 2 L − , the dihedral angle between the two aromatic rings is 25.54°.…”

“…72 From topological perspective, a simplified underlying three-dimensional network of 7 (Figure 6c) is defined as a trinodal 3,4,5-connected net of the 3,4,5T95 topology. Point symbol of this net is (4.6 3 .8 6 ) 2 (4 2 .8 4 )-( 63 ) 2 , wherein the (4.6 3 .8 6 ), (4 2 .8 4 ), and ( 6 29,37,45,48,49 In 9, the L 3− spacers show a μ 4 -bridging mode (mode VII, Scheme 4), with the COO groups adopting the η 1 :η 0 monodentate and μ 2 -η 1 :η 1 bidentate fashions, respectively. In μ 4 -L 3− , dihedral angle between the aromatic rings attains 33.57°.…”

“…A high diversity of aromatic polycarboxylate blocks including N -heterocyclic carboxylic acids has been vastly used as multifunctional blocks in crystal engineering of MOFs. − Among them, semirigid ligands containing phenyl-pyridine cores with a varying number and position of carboxylic groups and N -pyridyl functionality within the aromatic rings have attracted special interest. ,− This is justified by the possibility of the rotation of two aromatic rings, thus allowing compliance with coordination environment of certain metal ions. Furthermore, the presence of both N -pyridyl and O -carboxylate donor atoms as well as different deprotonaton degrees of carboxylic groups can facilitate the modification of coordination fashions, thus leading to the assembly of metal–organic nets with different structures. − Furthermore, these types of organic ligands can be involved in strong hydrogen bonding interactions, which can provide an extra stabilization of structures and facilitate the crystallization of products.…”

Metal ions directed assembly of two coordination polymers based on an organic phosphonate anion and a multidentate N-donor ligand

“…4, Cu1 is five-coordinated in a trigonal-bipyramid geometry, furnished by three nitrogen atoms from three different 4,4'-tmbpt ligands (Cu1-N1 = 2.039(3) Å, Cu1-N8 #1 = 2.051(2) Å, Cu1-N7 #2 = 2.056(2) Å) and two oxygen atoms from two individual HL anions (Cu1-O4 = 1.945(2) Å, Cu1-O2 #3 = 2.133(2) Å). All the bond lengths and angles in compounds 1 and 2 are in the normal ranges[31][32][33].…”