Precise Fabrication of Tetrametallic Metal-Organic Frameworks and Multivariate Hybrids for Enhanced Photothermal Tandem Catalysis
Yiwen Fan , Yang Wang , Huijuan Wang , Yuzhen Chen , Zhibo Li
Chemical Research in Chinese Universities ›› 2024, Vol. 40 ›› Issue (6) : 1141 -1150.
Precise Fabrication of Tetrametallic Metal-Organic Frameworks and Multivariate Hybrids for Enhanced Photothermal Tandem Catalysis
Multiple metal sites doped in metal-organic frameworks (MOFs) are essential for their promising application in cascade reactions. However, precision synthesis of tetrametallic MOFs with total coordination and regular shapes is challenging due to the different coordination abilities of four metal ions. Herein, a series of tetrametallic MOFs (t-MOFs) with four regular morphologies is successfully constructed by regulating the metal ratio, amount of morphologic modulating reagent or growth time. The t-MOFs can be flexibly oxidized to afford porous metal oxides (M xCo3O4, M=CuZnNi) under air or reduced to carbon-encapsulated CuCoNi under H2/Ar for different reactions to maximize the value-in-use of MOFs. In particular, the t-MOF@M xCo3O4 obtained upon the surface oxidation of t-MOF well integrates the Lewis-base sites from MOF core with photothermal oxidation activity from M xCo3O4 shell. The hybrid effectively catalyzes the cascade reaction of styrene oxidation coupling Knoevenagel condensation under visible light. Thus, the by-product, benzaldehyde, is successfully converted to easily separated benzylidene malononitrile to finally obtain pure styrene epoxide (SO). In M xCo3O4, Ni species afford good photothermal effect, Cu and Co species provide catalytic activity, and Zn species increase SO selectivity. The host-object coordination and the synergy among objects may greatly boost more complex reactions in the future.
Metal-organic framework / Multimetallic site / Photothermal catalysis / Cascade reaction / Host-object coordination
| [1] |
|
| [2] |
|
| [3] |
|
| [4] |
|
| [5] |
|
| [6] |
|
| [7] |
|
| [8] |
|
| [9] |
|
| [10] |
|
| [11] |
|
| [12] |
|
| [13] |
|
| [14] |
|
| [15] |
|
| [16] |
|
| [17] |
|
| [18] |
|
| [19] |
|
| [20] |
|
| [21] |
|
| [22] |
|
| [23] |
|
| [24] |
|
| [25] |
|
| [26] |
|
| [27] |
|
| [28] |
|
| [29] |
|
| [30] |
|
| [31] |
|
| [32] |
|
| [33] |
|
| [34] |
|
| [35] |
|
| [36] |
|
| [37] |
|
| [38] |
|
| [39] |
|
| [40] |
|
| [41] |
|
| [42] |
|
| [43] |
|
| [44] |
|
| [45] |
|
| [46] |
|
| [47] |
|
| [48] |
|
| [49] |
|
| [50] |
|
| [51] |
|
| [52] |
|
| [53] |
|
| [54] |
|
| [55] |
|
| [56] |
|
| [57] |
|
/
| 〈 |
|
〉 |