Generally, the naming of MOFs is arbitrary and often the letters represent where they were made (as in HKUST, Hong Kong University of Science and Technology, or CPO, Coordination Polymer of Oslo) or about the structure (ZIF, zeolite imidazole frameworks). In the case MOF-xxx it stands for Metal-Organic Framework.

However, a given letter code and number stands for one structure, but if the symmetry is retained while changing the metal ion one often uses the same code for the structure but specify the metal. In your case the frameworks would probably be referred to as MIL-101 (Al) and MIL-101 (Cr).

Edit: I believe the IL in MIL refers to Institut Lavoisier where this type of MOF was first developed.

Generally, the naming of MOFs is arbitrary and often the letters represent where they were made (as in HKUST, Hong Kong University of Science and Technology, or CPO, Coordination Polymer of Oslo) or about the structure (ZIF, zeolite imidazole frameworks). In the case MOF-xxx it stands for Metal-Organic Framework.

However, a given letter code and number stands for one structure, but if the symmetry is retained while changing the metal ion one often uses the same code for the structure but specify the metal. In your case the frameworks would probably be referred to as MIL-101 (Al) and MIL-101 (Cr).

Edit: I believe the IL in MIL refers to Institut Lavoisier where this type of MOF was first developed.

I agree with Anders

Thanks to all

So what is the difference between MIL and MIP?

Dear Yogesh,

Metal-organic framework solids (MOFs) are synthetic porous materials that have drawn intense efforts in their synthesis and many of their chemical properties, most notably their use for the sorption of gases and vapors. The MIL-Ti metal-organic frameworks (MOFs) with different organic linkers molar ratios can be synthesized. The pseudo-second order rate constant of dye removal was 0.2083, 0.0048 and 0.0005 mg/g min for BR46, BB41 and MB. The synthesized MILs showed high reusability and stability over three cycles.

A novel adsorbent, metal organic framework decorated graphene oxide (MIL-68/GO) composites were prepared successfully. Comparatively, the MIL-68/GO composites shows good adsorption properties in simulated seawater.

Ashish

I agree with Anders Teigland

Dear Shima Khademi, MIP stands for molecullar imprinted polymer

Dear Yogesh,

The naming of MOFs is arbitrary. It does not reflect any much significance but number changes according to functional structures.

Metal-organic frameworks (MOFs) are organic-inorganic hybrid crystalline porous materials that consist of a regular array of positively charged metal ions surrounded by organic 'linker' molecules. Metal–organic frameworks (MOFs) are a class of compounds consisting of metal ions or clusters coordinated to organic ligands to form one-, two-, or three-dimensional structures. Because of this property, MOFs are of interest for the storage of gases such as hydrogen and carbon dioxide. Due to their well‐defined 3D architectures, permanent porosity, and diverse chemical functionalities, metal–organic framework nanoparticles (MOF NPs) are an emerging class of modular nanomaterials. MIL-53 (MIL ⇒ Matériaux de l′Institut Lavoisier) belongs to the class of metal-organic framework (MOF) materials. Various MIL can be distinguished by the oxidation states, metal center (V, Cr, Al, Fe, Co, Ga, Mn, Sc and Ni) and their functional linkers (linker 1, linker 2 and linker ratio metal center and synthetic methods) of chemical structures. Sometime in mixed-metal MIL-53 materials, two different metals are incorporated into the framework structure at crystallographically equivalent lattice positions. Since both type of metals occupy equivalent positions, the metal ratio can usually be changed independent from the framework structure. Mixed-metal MIL-53 analogs can be synthesized mainly by direct synthesis procedures under hydrothermal or solvothermal conditions. The MIL-53 structure consists of inorganic [M-OH] chains, which may be connected to four neighboring inorganic chains by therephthalate-based linker molecules.

Name

Metal center and

oxidation state

MIL-53(V)

V3+

V4+

MIL-53(Cr)

Cr3+

MIL-53(Al)

Al3+

MIL-53(Fe)

Fe3+

Fe2+

MIL-53(In)

In3+

MIL-53(Co)

Co2+

MIL-53(Ga)

Ga3+

MIL-53(Mn)

Mn2+

MIL-53(Sc)

Sc3+

MIL-53(Ni)

Ni2+

The suitable molar ratios of Cr/H2BDC and H2O/H2BDC with metal center Cr terephelate metal can be used for the synthesis of MIL-101 with a large surface area and high crystallinity can maintained at 1.25 and 350, respectively. High water content in the synthesized gel significantly reduced particle size and crystallinity. MIL-101 can be exposed to ambient conditions for several months. MIL-101 is stable in water, benzene, and toluene even at boiling point for several hours. MIL-101 exhibited excellent photodegradation of RBB (Remazol Black B (RBB) dye) in the UV region. Its application in the photocatalytic degradation of Remazol Black B (RBB) dye is most common. Linker with functional structures can be used in Gas adsorption: Carbon dioxide and methane gas, Liquid adsorption and Catalysis application.

Ashish