1D Tube, 2D Layer, and 3D Framework Derived from a New Series of Metal(II)−5-Aminodiacetic Isophthalate Coordination Polymers

Abstract

Three novel coordination polymers, [Cu 2 (adip)(H 2 O) 4 ] n ‚nH 2 O (1), [Co 3 (Hadip) 2 (H 2 O) 6 ] n ‚2nH 2 O (2), and [Zn 7 (adip) 4 -(H 2 O) 10 K 2 (H 2 O) 2 ] n ‚4nH 2 O (3), were solvothermally synthesized by adopting a new type of multicarboxylate ligand, H 4 adip (H 4 adip) 5-aminodiacetic isophthalic acid). Compound 1 features a 1D tube-like structure, compound 2 shows novel 2D (3,4)-connected nets, and compound 3 possesses an interesting 3D architecture, all of which possess channels hosting guest water molecules. A particular interest of the adip 4ligand is its propensity to bind metal ions forming various metallocycles, which could be viewed as the basic building blocks in the construction of supramolecular frameworks. Thermogravimetric analyses (TGA) were performed on compounds 1, 2, and 3. Variable-temperature magnetic susceptibility of 2 was investigated. An intense blue luminescence with an emission band peaking at 454 nm observed for 3 may result from ligand-to-metal charge transfer (LMCT).

Novel hexanuclear zinc(II) complex of 1,3,5-benzenemethyltriiminodiacetate

“…The bond lengths of Zn-O in the range of 2.040(4)-2.156(4) Å and Zn-N distances range from 2.198(4) to 2.245(4) Å . As expected, the sphere d orbital will be used by the six-coordinated Zn(II), therefore, the Zn-O and Zn-N distances are longer than corresponding 4-and 5-coor dinated analogs [16] but similar to those in 6-coordinated analogs [9,16]. It is noted that all assembled hexanuclear zinc complexes reported are bridged via oxo and/or 1,3-carboxylic oxygen atoms.…”

“…Hence, Sun et al have introduced a methylene group between benzene ring and terminal carboxylic group on H 3 btc and obtained cobalt(II) and Nickel(II) complexes with the flexible 1,3,5-benzenetriacetic acid (H 3 bta) [8]. In addition, Hong et al utilized a flexible iminodiacetic group to displace one of three carboxylic groups on the H 3 btc, and three coordination polymers involved Co(II), Cu(II), Zn(II) ions assembled from this ligand were reported [9].…”

Syntheses, structures and anion exchange properties of accommodative silver chains using a positively charged and flexible ligand

“…Rigid and negatively charged ligands are in general favored for the construction of coordination polymers, because it is relatively easier to design product structures and to acquire crystals of X-ray diffraction quality using rigid ligands [20,21], and negatively charged ligands are considered to provide strong coordination bonds with metal centers [4,22,23].…”

Infinite Metal–Carboxylate Nanotube Constructed Metal–Organic Frameworks and Gas Sorption Properties

“…To date, some MOFs possessing neoteric structures with ligands incorporating the IDA moiety have been reported. [9] However, little effort has been spent on studying multi-iminodiacetic ligands.…”