Coordination polymers of macrocyclic oxamide with 1,3,5-benzenetricarboxylate: syntheses, crystal structures and magnetic properties

Abstract

Solvothermal reactions of mixed ligands H(3)BTC and macrocyclic oxamide complexes (ML, M = Cu, Ni) with M(ClO(4))(2)·6H(2)O (M = Co, Zn, Ni and Cd) afford six new complexes, including [M'(4)(BTC)(2)(ML)(2)(OH)(2)(H(2)O)(2)]·2H(2)O (M' = Co, M = Ni, for (1); M' = Zn, M = Ni, for (2); M' = Zn, M = Cu, for (3)), [Ni(3)(BTC)(2)(NiL)(2)(H(2)O)(6)]·2CH(3)OH·2H(2)O (4), [Cd(4)(BTC)(2)(HBTC)(NiL)(4)(H(2)O)]·3H(2)O (5) and [Cd(HBTC)(CuL)]·H(2)O (6) (ML, H(2)L = 2, 3-dioxo-5, 6, 14, 15-dibenzo-1,4,8,12-tetraazacyclo-pentadeca-7,13-dien; H(3)BTC = 1,3,5-benzenetricarboxylic acid). Complexes 1-3 consist of a 2D layer framework formed by the linkage of M(II)(M = Ni, Cu) and M'(4) (M' = Co, Zn) cluster via the oxamide and BTC(3-) bridges and display a (3,6)-connected network with a (4(3))(2)(4(6).6(6).8(3)) topology. The structure of 4 consists of pentanuclear [Ni(II)(5)] units and arranges in a 1D cluster chain. Complex 5 exhibits a 2D layered structure characterized by 3,4,3-connected (4.6(2))(3)(4.6(3).8(2))(4(2).6(3).8)(4(2).6) topology. Complex 6 possesses a 3D network with sra topology. The magnetic properties of complexes 1 and 4 were investigated.

Temperature-Dependent Supramolecular Isomeric Zn(II)-Metal–Organic Frameworks and Their Guest Exchange

“…In 1a , two parallel -(obc-Zn) n - chains acting as rails are linked by bpp linkers with a twist-boat conformation (Figure e) as rungs to form a ladder-like channel (Figure b), which is highly corrugated due to the angular nature of the obc ligand. Further, other bpp ligands with a chair conformation link the ladders to generate a four-coordinated 3D net with sra (SrAl 2 ) topology (Figure c,d). − The channel of an individual sra net provided by bpp ligands parallel to the a -axis is sufficiently large to give rise to an 8-fold interpenetrated structure (Figure f). In fact, the 8-fold interpenetration in 1a has two sets of normal 4-fold interpenetrated nets which can be called [4 + 4] interpenetration (Figure g). − Thus, the voids in the smaller ladder-like channels parallel to the a -axis are occupied by some water molecules used in synthesis.…”

Two 3d-4f Heterometallic Coordination Polymers of Macrocyclic Oxamide with Benzotriazole-5-carboxylate Co-ligand: Syntheses, Crystal Structures and Magnetic Properties

“…Especially, benzotriazole‐5‐carboxylate has five coordination atoms and different bonding modes, which makes it easy to design and construct extended frameworks . In our previous work, although some 3d‐3d′ heterometallic coordination polymers based on macrocyclic oxamide and aromatic multicarboxylate have been obtained, those containing 3d‐4f have been prepared rarely.…”

Coordination polymer {[Cd2(NiL)2(Btca)2] · H2O}n of macrocyclic oxamide with benzotriazole-5-carboxylate: Syntheses, crystal structures, and fluorescence properties

“…However, hetero metallic coordination polymers remain relatively scarce because of the coordinative complexity of the heterometallic ions involved in the self assembly pro cess [11][12][13][14][15][16]. Recently, some aromatic multicarboxy late as co ligands were chosen to design and construct diverse oxamido bridged heteropolynuclear networks [17][18][19][20]. However, those containing oxamide and het erocyclic carboxylate mix bridged polynuclear com plexes have been made rarely [17][18][19][20][21].…”

“…Recently, some aromatic multicarboxy late as co ligands were chosen to design and construct diverse oxamido bridged heteropolynuclear networks [17][18][19][20]. However, those containing oxamide and het erocyclic carboxylate mix bridged polynuclear com plexes have been made rarely [17][18][19][20][21].…”