1. An organic linker of the formula I: Formula I

2. A process for preparing the organic linker as claimed in claim 1, the process comprising: a) contacting 1,3,5 benzene tricarboxylic acid chloride with 4-amino benzoic acid in a mole ratio ranging between 1:4 to 1:5, in the presence of a base and a solvent to obtain a mixture; b) stirring the mixture for a period of 14 - 18 hours, followed by filtration, to obtain colorless crystals of organic linker of formula I.

3. The process for preparing the organic linker as claimed in claim 2, wherein the base is triethyl amine.

4. A metal-organic framework of formula M-L, wherein M is a metal selected from the group consisting of alkaline earth metals, transition metals and combinations thereof and 'L' is an organic linker of the formula I as claimed in claim 1.

5. The metal-organic framework as claimed in claim 4, wherein the metal is selected from the group consisting of Mg and Mn.

6. A process for preparing a metal organic framework of formula M-L as claimed in claim 4, the process comprising: contacting at least one metal salt and an organic linker of formula I, in the mole ratio range of 80:1 to 40:1 in an organic solvent to obtain a solution; and heating the solution at a temperature range of 60 ?C -140 ?C for a period of about 50-100 hours followed by slow cooling to room temperature to obtain crystals of metal organic framework of formula M-L.

7. The process as claimed in claim 6, wherein the at least one metal salt is selected from the group consisting of MgCl2. 6H2O and MnCl2. 4H2O.

8. The metal-organic framework as claimed in claim 4 for use in storage of at least one gas, preferably hydrogen.

DESC:METAL-ORGANIC FRAMEWORK MATERIALS FOR GAS STORAGE ,CLAIMS:1. An organic linker of the formula I:

Formula I
2. A process for preparing the organic linker as claimed in claim 1, the process comprising:
a) contacting 1,3,5 benzene tricarboxylic acid chloride with 4-amino benzoic acid in a mole ratio ranging between 1:4 to 1:5, in the presence of a base and a solvent to obtain a mixture;
b) stirring the mixture for a period of 14 - 18 hours, followed by filtration, to obtain colorless crystals of organic linker of formula I.
3. The process for preparing the organic linker as claimed in claim 2, wherein the base is triethyl amine.
4. A metal-organic framework of formula M-L, wherein M is a metal selected from the group consisting of alkaline earth metals, transition metals and combinations thereof and 'L' is an organic linker of the formula I as claimed in claim 1.
5. The metal-organic framework as claimed in claim 4, wherein the metal is selected from the group consisting of Mg and Mn.
6. A process for preparing a metal organic framework of formula M-L as claimed in claim 4, the process comprising:
contacting at least one metal salt and an organic linker of formula I, in the mole ratio range of 80:1 to 40:1 in an organic solvent to obtain a solution; and
heating the solution at a temperature range of 60 ?C -140 ?C for a period of about 50-100 hours followed by slow cooling to room temperature to obtain crystals of metal organic framework of formula M-L.
7. The process as claimed in claim 6, wherein the at least one metal salt is selected from the group consisting of MgCl2. 6H2O and MnCl2. 4H2O.
8. The metal-organic framework as claimed in claim 4 for use in storage of at least one gas, preferably hydrogen.