DESC:HIGH GAS ADSORPTION IN A METAL ORGANIC FRAMEWORK ,CLAIMS:1. An organic linker represented by formula I:

Formula I
2. A process for preparing the organic linker of formula I as claimed in claim 1, the process comprising:
a) adding 4-amino benzoic acid to 1,4,5,8-napthalene tetracarboxylic acid dianhydride in a weight ratio in the range of 1:5 to 5:1 in an organic solvent to obtain a mixture; and
b) heating the mixture at a temperature range of 160?C - 190 ?C for a period of 1 - 2 hours to obtain an organic linker of formula I.
3. The process as claimed in claim 2, wherein the organic solvent is selected from the group comprising of polar solvents, non polar solvents, and mixtures thereof.
4. The process as claimed in claim 2, wherein the organic solvent is selected from the group comprising of acetone, acetonitrile, DMF, DMA, DMSO, ethyl acetate, and mixtures thereof, preferably DMF.
5. A process for preparing the organic linker of formula I as claimed in claim 2, the process comprising:
c) adding 4-amino benzoic acid to 1,4,5,8-napthalene tetracarboxylic acid dianhydride in a weight ratio of 1:1 in DMF to obtain a mixture; and
d) heating the mixture at a temperature of 180 ?C for 1.5 hours, to obtain an organic linker of formula I.
6. A metal-organic framework of the formula M-L, wherein,
M comprises a metal ion and L is an organic linker of formula I as claimed in claim 1

Formula I
7. The metal-organic framework as claimed in claim 6, wherein the metal ion is selected from the group consisting of alkaline earth metals, transition metals, and mixtures thereof.
8. The metal-organic framework as claimed in claim 6, wherein the metal ion is Mg.
9. The metal-organic framework as claimed in claim 6, wherein the metal ion is Co.
10. A process for preparing a metal organic framework as claimed in claim 6, the process comprising:
dissolving at least one metal salt and an organic linker of formula I as claimed in claim 1 in a solvent in a weight ratio in the range of 2:1 to 30:1 to obtain a solution;
heating the solution at a temperature range of 90?C - 150 ?C for a period of about 50-100 hours; and
cooling slowly to a temperature in the range of 10-30°C to obtain crystals of metal organic framework.
11. The process as claimed in claim 10, wherein the metal salt is selected from the group comprising of alkaline earth metal salts, transitional metal salts, and mixtures thereof, preferably selected from the group comprising of alkaline earth metal halides, and transitional metal nitrates, most preferably selected from the group comprising of MgCl2. 6H2O and Co(NO3)2. 6H2O.
12. The process as claimed in claim 10, wherein the solvent is selected from the group comprising of polar solvents, and mixtures thereof, preferably selected from the group comprising of DMF, DMA, ethanol, methanol, water, acetonitrile, acetone, ethyl acetate, acetyl acetonate, DMSO, and mixtures thereof, most preferably selected from the group comprising of DMF, ethanol, water, and mixtures thereof.
13. A process for preparing a metal organic framework as claimed in claim 6, the process comprising:
dissolving MgCl2. 6H2O and an organic linker of formula I as claimed in claim 1, in the ratio of 16:1 by weight in a solvent to obtain a solution, wherein the solvent is DMF:ethanol:water in the ratio of 15:1:1 v/v;
heating the solution at a temperature of 125 ?C for 72 hours; and
cooling slowly to a temperature in the range of 10-30°C to obtain crystals of metal organic framework.
14. The process as claimed in claim 13, wherein the metal organic framework material has a distorted octahedral structure
15. A process for preparing a metal organic framework as claimed in claim 6, the process comprising:
dissolving Co(NO3)2. 6H2O and an organic compound of formula I in a ratio of 6:1 by weight in a solvent to obtain a solution, wherein the solvent is DMF: ethanol: water in the ratio of 3:2:2 v/v;
heating the solution at a temperature of 100 ?C for 96 hours; and
cooling slowly to a temperature in the range of 20-30°C to obtain crystals of metal organic framework.
16. The process as claimed in claim 15, wherein the metal organic framework material has a cubic structure
17. The metal-organic framework as claimed in claim 6, wherein the metal-organic framework is used for storage of gas selected from the group consisting of ammonia, argon, helium, hydrogen sulfide, carbon dioxide, carbon monoxide, hydrogen, nitrogen, methane and combinations thereof, preferably hydrogen.