Three Zinc(II) Phosphonates: Syntheses, Structures and Sensing of Copper(II) Ions

Abstract

Three zinc(II) phosphonocarboxylates, [Zn3(m‐bpc)2(OH)]⋅(CH3)2NH2⋅H2O (1), [Zn2(m‐bpc)(m‐Hbpc)(4,4′‐bpy)]⋅(CH3)2NH2⋅H2O (2) and [Zn3(m‐bpc)2(4,4′‐bpy)(CH3)2NH]⋅H2O (3) (m‐H3bpc=3‐phosphonobenzoic acid, 4,4′‐bpy=4,4′‐bipyridine), have been solvothermally synthesised to generate unique topologies, as characterised by single‐crystal XRD. Compound 1 possesses a diamond topology, which has rarely been found among phosphonate‐based metal–organic frameworks. Compound 2 shows a 2D layered structure with pendant m‐Hbpc and 4, 4′‐bpy ligands, in which the layers feature as a zeolite‐like network. Compound 3 has a 3D sandwich pillared‐layer framework with an interesting double‐helix structure. Only 1 shows an adsorption capacity for CO2 of 28.5 cm3 g−1 at 273 K. Luminescence studies revealed that both 1 and 2 could be potential sensors to copper(II) ions.

Excitation‐Wavelength‐Dependent Luminescence of Chemically and Physically Mixed Europium and Terbium Phosphonates: Color‐Tunable Luminescence, Near‐White‐Light Emission, and Selective Fe3+ Detection

“…[45][46][47][48] This is mostly ascribed to the multisite strong coordination of phosphonates, [RPO 3 ] 2À and [RP(OH)O 2 ] À , with metal ions through multiple O donors. [47][48][49][50] In view of these characteristics, metal phosphonates may act as promising potential materials for multitudinous applications, such as proton conduction, [51][52][53] magnetic materials, [54][55][56] catalysis, [49,53] ion exchange, [51,57] gas sorption, [58] chemical sensing materials, [59][60][61][62][63][64][65] and so on. Interestingly, it is noted that molecular lanthanide phosphonate complexes (LnPs) and phosphonate based Ln-MOFs (LnP-MOFs) are rarely reported even though they possess essentialities of advantages as both Ln-MOFs and metal phosphonates.…”

Nanosheets of two-dimensional photoluminescent lanthanide phosphonocarboxylate frameworks decorated with free carboxylic groups for latent fingerprint imaging

“…Our group has focussed on the syntheses and applications of metal phosphocarboxylate frameworks in recent years. [34][35][36][37][38] Phosphonocarboxylic acid with bifunctional groups has great tendency to form 2-D structures with uncoordinated active sites between the layers. In this work, we used lanthanide ions and phosphonocarboxylic acid to construct luminescent MOF materials.…”

[Na4(N5)4(H2O)2]·H2O·2MeOH: a honeycomb-like sodium pentazolate framework with helical chains

“…2h and i). Each enclosed helical channel is assembled from two right-handed helical chains 15,16 by sharing the sides of multiple pentagons (Fig. 2j).…”