Novel amine templated three-dimensional zinc-organophosphonates with variable pore-openings

Abstract

Amine templated three-dimensional zinc-organophosphates with different ring sizes have been obtained by varying the organic amine molecules. The figure shows the various net structures obtained during the study.

Two Cobalt-diphosphonates Templated by Long-Chain Flexible Amines: Synthesis, Structures, Proton Conductivity, and Magnetic Properties

“…Considering the similarity between inorganic phosphates (or phosphites) and organophosphonates, the organoamines-directed assembly is also applicable to the metal phosphonate. An overview of literature indicated that the early investigated organoamines mainly focus on the small rigid/flexible species, just exampled by heterocyclic amine and aliphatic amine. − By contrast, the long aliphatic amine (the total atoms for the chain larger than eight) − and large heterocyclic amine (the N -heterocycle larger than three) are relatively less investigated. − This is not surprising for several reasons, one of which may be partly due to the fact that such long-chain flexible organic amines are easily decomposed under hydrothermal conditions.…”

Charge Separated One-Dimensional Hybrid Cobalt/Nickel Phosphonate Frameworks: A Facile Approach to Design Bifunctional Electrocatalyst for Oxygen Evolution and Hydrogen Evolution Reactions

“…Of late, the advancement of transition-metal-based materials such as oxides, nitrides, sulfides, selenides, hydroxides, phosphides, phosphates, and various composite materials are considered as excellent catalysts for boosting electrochemical water splitting performance by replacing precious platinum/iridium catalysts. − The selection of flexible phosphonate groups along with incorporation of variable templated organoamines in hybrid metal phosphonate structures not only lead to a variety of structures but also serve as charge separators with modulated catalytic activity. − Interestingly, the lower dimensional transition metal phosphonate are often exciting for their strange magnetic behaviors and field-induced transitions. − However, among plentiful stimulating properties of hybrid metal phosphonates, the electrocatalytic water splitting reaction remains less explored so far. − With our continuous effort with metal phosphonates, − herein we have isolated two new hybrid one-dimensional transition-metal phosphonate chain structures with templated TETA through a hydrothermal pathway (i.e., [H 2 TETA]­[M­(H 2 hedp) 2 ]·2H 2 O, where M = Co for I , Ni for II ; H 4 hedp = 1-hydroxyethane-1,1-diphosphonic acid; TETA = triethylenetetramine) for the investigation of their electrochemical behaviors toward OER and HER. The present study not only explores the potential of any low cost bifunctional OER/HER catalyst designed by organophosphonate ligands but also exposes a promising avenue to explore stable, efficient, and precious-metal-free lower-dimensional framework structures as electrocatalysts.…”

Colossal Dielectric Responses from the Wide Band Gap 2D-Semiconducting Amine Templated Hybrid Framework Materials

“…Silver­(I) ions, by their inherent chemical nature of irregular coordination number and geometry, are best suited for isolating fascinating hybrid frameworks. − However, the amine-templated silver­(I) phosphonate frameworks have not been thoroughly investigated to date. In continuation of our earlier work, − we have synthesized two silver­(I) diphosphonate layer structures with templated piperazine, viz, [C 4 H 12 N 2 ]­[Ag 4 (hedp) 2 ] ( I ) and [C 4 H 12 N 2 ]­[Ag 10 (hedp) 4 (H 2 O) 2 ]·2H 2 O ( II ; hedp = 1-hydroxyethane-1,1-diphosphonic acid), with variable silver clusters and exciting properties. For the first time, extremely high dielectric permittivity values are observed with the present 2D semiconducting silver-phosphonate frameworks.…”