Array configurations of oxometallate–Ag cluster hybrid nanocomposites

Abstract

Oxometallate (MO)-modified Ag clusters have attracted considerable research interest due to their aesthetic structures and fascinating properties. MOs can be can be a key factor in the organization of Ag...

A Highly Chemically Robust 3D Interpenetrated MOF Heterogeneous Catalyst for the Synthesis of Hantzsch 1,4‐Dihydropyridines and Drug Molecules

“…It is very inspirational that more than 10 000 products are being synthesized every year by employing various solid catalysts, which further trigger ≈15% of the world's GDP worth around $10 trillion per year. [1] In the contest of heterogeneous catalysis, Metal-organic frameworks (MOFs) have attracted immense attention over other solid catalysts having their unique structural features such as well-defined pore structure and high porosity, [2][3][4][5][6][7][8][9][10][11] versatile functionality, [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] diverse composition, [30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46] tunable topography, [47]…”

“…It is very inspirational that more than 10 000 products are being synthesized every year by employing various solid catalysts, which further trigger ≈15% of the world's GDP worth around $10 trillion per year. [ 1 ] In the contest of heterogeneous catalysis, Metal–organic frameworks (MOFs) have attracted immense attention over other solid catalysts having their unique structural features such as well‐defined pore structure and high porosity, [ 2–11 ] versatile functionality, [ 12–29 ] diverse composition, [ 30–46 ] tunable topography, [ 47–53 ] framework flexibility, [ 54–59 ] and improved stability. [ 60–62 ] Taking advantage of three different parts in MOFs, i) metal nodes, ii) employed organic ligands, and iii) the pore system , they have been explored in several multicomponent heterogeneous catalysis reactions such as condensations, oxidations, and C─C couplings, etc.…”

Highly Robust Metal–Organic Framework for Efficiently Catalyzing Knoevenagel Condensation and the Strecker Reaction under Solvent-Free Conditions

“…Among the solid catalysts, the employment of heterogeneous catalysts is more advantageous than the homogeneous catalysts due to having several superiorities such as (i) easier catalyst recovery by filtration from reaction mixtures , (ii) reusable for consecutive runs , and (iii) their excellent adaptability to continuous flow processes . , However, to obtain the maximum efficiency of heterogeneous catalysts, a high surface area is required for more favorable interactions between the active sites of employed insoluble solids and the substrates and reagents. In this regard, metal–organic frameworks (MOFs) are the superior candidate over other solid catalysts, as they possess distinct superior qualities such as a high surface area with well-defined porosity − and innumerable structural diversity with suitable framework tunability. − MOFs exhibit superior catalytic activity due to the presence of several active sites such as (i) open metal sites (OMSs) , (ii) structural defect formations , (iii) bared functional groups’ presence of the employed organic linkers, and so on . Moreover, the synthesis flexibility and various binding modes of the metal centers (which often generate OMSs by mild activation) made MOFs promising candidates for heterogeneous catalysis.…”