Template-directed hierarchical copper(II)-organophosphonate compounds: Syntheses, crystal structures, magnetic and luminescence properties

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.…”

Fixing CO2 under Atmospheric Conditions and Dual Functional Heterogeneous Catalysis Employing Cu MOFs: Polymorphism, Single-Crystal-to-Single-Crystal (SCSC) Transformation and Magnetic Studies

“…In all of the compounds, 1 – 5 , we observed the emission band at ∼390 nm (λ ex = 330 nm), which is the blue-shifted emission band of the pristine ligand. This indicates that the intraligand (π–π*) transition becomes more favorable in the presence of Cu 2+ ions (d 9 system). , The dehydrated compound 1 also exhibits the ligand-centric emission centered at ∼390 nm (λ ex = 330 nm).…”

“…This indicates that the intraligand (π−π*) transition becomes more favorable in the presence of Cu 2+ ions (d 9 system). 63,64 The dehydrated compound 1 also exhibits the ligandcentric emission centered at ∼390 nm (λ ex = 330 nm).…”

Enhanced Catalytic Activity of a Copper(II) Metal–Organic Framework Constructed via Semireversible Single-Crystal-to-Single-Crystal Dehydration

“…Metal–organic frameworks (MOFs) are an emerging class of crystalline materials composed of inorganic vertices (metal nodes or clusters) coordinated with organic struts (spacers) to form one-dimensional (1D), two-dimensional (2D), or three-dimensional (3D) architectures. , MOFs are widely regarded as a subtype of coordination polymers or coordination frameworks. Essentially, MOFs consist of open channels formed primarily by ejecting guest and terminal coordinated solvents through low-pressure heating. , Of the numerous porous materials reported to date, only a handful of examples show a much greater range of response to external stimuli than conventional materials. , Moreover, the activation of MOFs, which raises the energy state of these materials by eliminating the pore-filling solvent in the pore channels and the coordinating solvent that saturates the metal nodes, is an essential prerequisite for the use of MOFs in a variety of important structural applications, − ranging from luminescence to molecular magnetism, , gas storage, gas or liquid separation, drug delivery, photocatalysis, electrocatalysis, , etc. Another industrially relevant application for which MOFs have shown promise is heterogeneous catalysis, , which is proving to be a versatile alternative to conventional inorganic materials, especially for a variety of organic oxidation processes.…”

“… 3 , 4 Of the numerous porous materials reported to date, only a handful of examples show a much greater range of response to external stimuli than conventional materials. 5 , 6 Moreover, the activation of MOFs, which raises the energy state of these materials by eliminating the pore-filling solvent in the pore channels and the coordinating solvent that saturates the metal nodes, is an essential prerequisite for the use of MOFs in a variety of important structural applications, 7 − 9 ranging from luminescence to molecular magnetism, 10 , 11 gas storage, 12 gas or liquid separation, 13 drug delivery, 14 photocatalysis, 15 electrocatalysis, 16 , 17 etc. Another industrially relevant application for which MOFs have shown promise is heterogeneous catalysis, 18 , 19 which is proving to be a versatile alternative to conventional inorganic materials, especially for a variety of organic oxidation processes.…”