In situ Raman and FTIR spectroscopic study on the formation of the isomers MIL-68(Al) and MIL-53(Al)

Abstract

The paper describes a method to induce the formation of MIL-68(Al) rather than MIL-53(Al) using a formic acid modulated synthesis approach.

Influence of Pore Structure and Metal‐Node Geometry on the Polymerization of Ethylene over Cr‐Based Metal–Organic Frameworks

“…For MIL‐53(Cr) a crystalline material is obtained, which consists of exclusively needles (sized 5–10 μm). It is worth stating that MIL‐53(Cr) is the thermodynamic product of MIL‐101(Cr) [57, 77–79] . In case of HKUST‐1(Cr), a uniform powder consisting of the octahedral crystals in Figure 7 E is obtained.…”

“…It is worth statingt hat MIL-53(Cr) is the thermodynamic product of MIL-101(Cr). [57,[77][78][79] In case of HKUST-1(Cr), au niform powder consisting of the octahedral crystalsi nF igure 7E is obtained. Again,t his is perfectlyi nl ine with what is reported in the literature on the morphologyo f this MOF.…”

In Situ Monitoring of Particle Formation with Spectroscopic and Analytical Techniques Under Solvothermal Conditions

“…Using the reactor setup described above, we have applied in situ techniques to monitor the formation of various material systems such as metal‐organic frameworks , , ZnO mesocrystals , and also to follow the evolution of the optical properties of carbon nanodots over time . In the following, an overview of the key results that have been achieved using the reactor depicted in Fig.…”

“…whereby k 0 is the formation constant under standard conditions, R is the ideal gas constant, and T is the absolute reaction temperature. The calculated activation energy of PNBU formation (65.5 kJ mol −1 ) was found to be significantly lower than that of MOF formation (90.4 kJ mol −1 ) , .…”

Study on the mechanism of catalytic synthesis of dimethyldichlorosilane by AlCl3/MIL‐53(Al)@γ‐Al2O3

“…In recent years, metal-organic framework materials (MOFs) have attracted much attention from scholars due to their advantages of adjustable structure, [15][16][17] porosity, [18,19] large specific surface area, [20][21][22] and unsaturated metal sites. [23,24] Aluminum 1, 4benzenedicarboxylate (Al (OH)[O 2 C-C 6 H 4 -CO 2 ]Á[HO 2 C-C 6 H 4 -CO 2 H] 0.70 , abbreviated as MIL-53(Al)) has a regular pore structure, a large specific surface area, and unsaturated points, [25,26] which provides good attachment sites for catalysis, especially the active sites of Al-O-H, thereby showing strong catalytic activity in the disproportionation of methyltrichlorosilane and trimethylchlorosilane to dimethyldichlorosilane. In this regard, we are deeply inspired by combining the active sites of AlCl 3 and MIL-53(Al) to simulate the local integrated structure of the catalyst AlCl 3 /MIL-53(Al).…”