An Independent 1D Single‐Walled Metal–Organic Nanotube Transformed from a 2D Layer Exhibits Highly Selective and Reversible Sensing of Nitroaromatic Compounds

Abstract

The syntheses and structures of two new Zn(II) complexes, a 2D graphite-like layer {[Zn(PIA)H2 O]⋅H2 O}n (1) and an independent 1D single-walled metal-organic nanotube (SWMONT) {[Zn2 (PIA)2 (bpy)2 ]⋅2.5 H2 O⋅DMA}n (2), have been reported based on a "Y"-shaped 5-(pyridine-4-yl)isophthalic acid ligand (H2 PIA). Interestingly, the 2D graphite-like layer in 1 can transform into the independent 1D SWMONT in 2 with addition of 2,2'-bipyridine (bpy), which represents the first successfully experimental example of an independent 1D metal-organic nanotube generated from a 2D layer by a "rolling-up" mechanism.

Structural Engineering of Low‐Dimensional Metal–Organic Frameworks: Synthesis, Properties, and Applications

“…[119][120][121] A number of direct synthetic methods, namely template-free method, toward 1D MOF structures have been developed so far, such as "rolling-up" of 2D layer, [85,97,[122][123][124] crystal phase transformation, [52,125,126] oriented assembly of designed organic ligands and metal ions, [92,127,128] and so on. [119][120][121] A number of direct synthetic methods, namely template-free method, toward 1D MOF structures have been developed so far, such as "rolling-up" of 2D layer, [85,97,[122][123][124] crystal phase transformation, [52,125,126] oriented assembly of designed organic ligands and metal ions, [92,127,128] and so on.…”

“…For example, Zamora and co-workers characterized the mechanical properties of 2D laminar MOF nanosheets, i.e., [Cu(m-pym 2 S 2 )(µ-Cl)] n , by using nanoindentation technique. [85] In addition, LD MOFs also possess promoted electrical conductivity due to shortened electron/charge transportation pathlength. Although this value is much lower than that of graphene oxide nanosheets (≈200 GPa), it is high enough to form a robust and freestanding MOF thin film with good photoluminescence property.…”

Assembly of Zn-metal organic frameworks based on a N-rich ligand: selective sorption for CO2 and luminescence sensing of nitro explosives

“…Fresh CH 2 Cl 2 was subsequently added, and the crystals were allowed to stay for an additional 24 h to remove the nonvolatile solvates (DMA). The Zn 2 -O bond lengths are in the range of 1.915(4)-1.972(3)Å, and the Zn 2 -N bond lengths are in the range of 1.984(4)-2.015(4)Å, the bond angles around the Zn 2 ranged 101.20 (14) to 118.16 (18) . Before the measurement, the samples were dried again by using the 'outgas' function of the surface area analyzer for 12 h at 90 C. Fig.…”

A heterometallic nanosized tube {Fe[(CN)6]2[Co(LN3O2)]3}n and two of its lamellar polymorphous isomers

“…1a, demonstrating that the tube is a semi-enclosed architecture formed by curling the cyanide-bridged Fe-Co network that extends along the direction of the a axis. [12][13][14] All the pyridine rings of the L N 3 O 2 ligands point outward from the tube wall; these out-stretched aromatic groups create a steric hindrance effect that weakens the inter-tube interactions from neighbors, which is consistent with the non-long-range magnetic behaviors. S4b †), which is large within the so-called MONTs series.…”

“…5,6 In further syntheses, these [MIJCN) n ] m− precursors can be combined with complexes such as [M II IJL)] m+ (M II = Mn, Ni, Co, Cu, and L = diamine or polyamine or Schiff-base), which has led to a variety of architectures in the cyanide family. 13 Inspired by but different from those early works, we synthesized and studied a series of heterometallic coordination isomers, including a MONT one, based on the precursors of [CoIJL N 3 O 2 )] 2+ and [FeIJCN) 6 ] 3− . In the recent work of Wu et al, a "rolling up" synthetic strategy for sheet/tube superstructure transformation was achieved 12 by tuning the interaction between asymmetric layers with different amine templates.…”