pH- and mol-ratio dependent formation of zinc(II) coordination polymers with iminodiacetic acid: Synthesis, spectroscopic, crystal structure and thermal studies

Abstract

Three novel zinc coordination polymers (NH 4 O (4) (phen=1,10-phenanthroline) have been synthesized and characterized by X-ray diffraction methods. 1 and 2 form one-dimensional (1-D) chain structures, whereas 3 exhibits a threedimensional (3-D) diamondoid framework with an open channel. The mononuclear complex 4 is extended into a 3-D supramolecular architecture through hydrogen bonds and π-π stacking. Interestingly, cyclic nonplanar tetrameric water clusters are observed that encapsulated in the 3-D lattice of 4. Based on 1 H and 13 C NMR observations, there is obvious coordination of complex 2 in solution, while 1 and 3 decompose into free iminodiacetate ligand. Monomer [Zn(ida)(H 2 O) 3 ] (5) is considered as a possible discrete species from 2. These coordination polymers can serve as good molecular precursors for zinc oxide.

Amino Acid‐Derived Sensors for Specific Zn2+ Detection Using Hyperpolarized 13C Magnetic Resonance Spectroscopy

“…The area under the peak (integration) increased linearly with increasing Zn 2 + concentration from 0t o0 .5 equivalents of Zn 2 + to [1-13 C 2 ]IDA, which indicatest hat [1-13 C 2 ]IDA binds to Zn 2 + with a2:1 probe:Zn stoichiometry,a sp reviously reported ( Figure 2C,D ). [20] Additionally,t he unbound [1-13 C 2 ]IDA peak demonstrated increasing line broadening in response to Zn 2 + (Table S5). It is worth noting that the [1-13 C 2 ]IDA:Zn complex appearsastwo separate peaks while the [1-13 C]Cys:Zn complex appearsa sasingle peak, indicating that the on and off rates for [1-13 C 2 ]IDAa re slower than the frequency differenceb etween bound and unbound resonances and the on ando ff rates for [1-13 C]Cys are more rapid.…”

Different Metal Aggregation in Copper Acetate Chain Coordination Polymers with Dipyridyl Tethers Bearing Hydrogen Bonding Capable Functional Groups

“…The synthesis and characterization of crystalline coordination polymers has attracted much recent interest because of these solids' potentially useful catalytic, absorbent, electronic, magnetic, or optical properties 1–5. Divalent metal carboxylate coordination polymers containing neutral, dipodal tethering coligands can be prepared by self‐assembly, either through hydrothermal reaction6 or slow diffusion of reactants in solution at ambient temperature 7. Probably the most frequently employed neutral tether in all of coordination polymer chemistry is the rigid‐rod dipyridyl ligand 4, 4′‐bipyridine (4, 4′‐bpy),8–14 used in tandem with standard inorganic polyatomic anions or organic carboxylates.…”

Synthesis, Crystal Structures and Luminescent Properties of pH-Dependent Zn (II) Coordination Polymers

“…It has been recognized that pH values can influence the structures of MOFs [20][21][22][23]. In this paper, the L and bib ligands were employed to construct two different coordination polymers at different pH values under hydrothermal conditions.…”