1. United States Patent number is 6,534,435, March 2003.

1. K.N. Rao, Rajesh Gopinath, M. Santhosh Kumar, I. Suryanarayana and P.S. Saiprasad, "Interaction-induced enhancement in the activity and selectivity of a titania-supported ammonium salt of a 12-molybdophospharic acid catalyst during ammoxidation of 2-methylpyrazine", J. Chem. Soc. Chem. Commun. (2001) 2088-2089

2. M. Santhosh Kumar, K.N. Rao, N. Lingaih, I. Suryanarayana and P.S. Saiprasad, "In situ synthesis by salt-surface interaction and the catalytic functionality of the ammonium salt of a 12-tungstophospharic acid", Green Chem. 4 (2002) 344-346

3. Javier Pérez-Ramírez,A. Brückner, M. Santhosh Kumar, F. Kapteijn, "Structure-activity relationships in N₂O conversion over FeMFI zeolites. Preparation of catalysts with a well-defined distribution of Fe species", Catalysis in Application. Page No. 308 , Published on 19^th June 2003.

4. M. Schweidder,F. Heinrich, M. Santhosh Kumar, A. Brückner, W. Grünert, "Fe-ZSM-5-Catalysts fort he Selective Reduction of NO: Influence of Preparation Route on Structure and Catalytic Activity"– Proceedings of the 14 ^th International Zeolite Conference 25^th April 2004, 2484.

5. Javier Pérez-Ramírez, M. Santhosh Kumar and A. Brückner, "Reduction of N₂O with CO over FeMFI zeolites: influence of the preparation method on the iron species and catalytic behavior" J. Catal. 223 (2004) 13-27.

6. M. Santhosh Kumar, M. Schwider, W. Grünert and A. Brückner, "On the nature of different iron sites and their catalytic role in Fe-ZSM-5 DeNO_x catalysts: new insights by a combined EPR and UV/VIS spectroscopic approach", J. Catal. 227 (2004) 384-397.

7. M. Schwider, M. Santhosh Kumar, A. Brückner and W. Grünert, "Active sites for NO reduction over Fe-ZSM-5 catalysts", J. Chem. Soc. Chem. Commun. (2005) 805-807.

8. M. Schwider, M. Santhosh Kumar, K. Klementiev, M. M. Pohl, A. Brückner and W. Grünert, "Selective reduction of NO with Fe-ZSM-5 of low Fe content I. Relations between active site structure and catalytic performance", J. Catal. 231 (2005) 328-344.

9. Javier Pérez-Ramírez,J. C. Groen,A. Brückner, M. Santhosh Kumar, U. Bentrup, M. N. Debbagh and L. A. Villaescusa, "Evolution of isomorphously substituted iron zeolites during activation: comparison of Fe-beta and Fe-ZSM-5", J. Catal. 232 (2005) 318-334.

10. M. Santhosh Kumar, Javier Pérez-Ramírez, M. N. Debbagh,B. Smarsly and A. Brückner "Evidence of the vital role of the pore network on various catalytic conversions of N₂O over Fe-silicalite and Fe-SBA-15 with the same iron constitution" Appl. Catal. B: Environmental 62 (2005) 244-254.

11. M. Santhosh Kumar, M. Schwider, W. Grünert and A. Brückner, "Selective reduction of NO with Fe-ZSM-5 of low Fe content: Part II: Assessing the function of different Fe sites by spectroscopic in situ studies", J. Catal, to be submitted

12. M. Schwider, M. Santhosh Kumar, N. N. Debha, Javier Pérez-Ramírez, A. Brückner and W. Grünert, "The role of Bronsted acidity in the selective reduction of NO over Fe-ZSM-5 catalysts" Micropor. Mesopor. Mater, to be submitted

1. Elucidating the structure of Fe⁺³ sites in Fe-ZSM-5 DeNO_x catalysts by in-situ EPR and in-situ UV/Vis spectroscopy
M. Santhosh Kumar , M. Schwidder, W. Grünert and A. Brückner-XXXVI. Jahrestreffen Deutscher Katalytiker 19^th-21^st March 2003 at Weimar-Germany.

2. Verschiedene wege zur Darstellung von Fe-ZSM-5 katalysatoren für die selective katalytische reduction (SCR) von NO mit NH₃ und iso-butan und Charakterisierung mittels Photoelektronen- und XAFS-Spektroskopie
M. Schwidder, F. Heinrich, M. Santhosh Kumar, A. Brückner, W. Grünert-XXXVI. Jahrestreffen Deutscher Katalytiker 19^th-21^st March 2003 at Weimar-Germany.

3. Elucidating the structure of Fe⁺³ sites in Fe-ZSM-5 DeNO_x catalysts by in-situ UV-Vis-DRS and in-situ EPR spectroscopy
M. Santhosh Kumar , M. Schweidder, W. Grünert, U. Bentrup and A. Brückner- Presented at ACA - Status Seminar-2002, Berlin on 6^th May 2003.

4. Structure and behavior of active sites in Fe-ZSM-5 DeNO_x catalysts: New insights by spectroscopic in situ-studies
M. Santhosh Kumar, M. Schwidder, W. Grünert and A. Brückner-18^th NAM (North American catalysis society Meeting) 1^st –6^th June 2003 at Cancun-Mexico

5. Javier Pérez-Ramírez,A. Brückner, M. Santhosh Kumar, F. Kapteijn International Symposium on Applied Catalysis at University of Glasgow 16^th July 2003. This was a joint meeting of RSC and the Institution of Chemical Engineers.

6. Multitechnique characterization of Fe-ZSM-5 catalysts for NO_x abatement: On the way to the identification of the active iron sites
M. Santhosh Kumar, A. Brückner, M. Schweidder, K.V. Klementiev, W. Grünert - EUROPA CAT-VI, August 31^st to 4^th September 2003 at Innsbruck-Austria.

7. Structure and function of active iron sites in Fe-ZSM-5 catalysts during selective catalytic reduction (SCR) of NO: New Insights by Spectroscopic In-situ Studies
M. Santhosh Kumar , M. Schwidder, W. Grünert, U. Bentrup and A. Brückner,
Presented at Indo-German Catalysis Workshop, Berlin on 26^th September 2003 on the occasion of Asian Pacific Weeks, Berlin 2003.
*Presented by the author underlined

8. Behavior of iron sites in Fe-ZSM-5 during N₂O decomposition studied by in-situ UV-Vis-DRS and in-situ EPR
M. Santhosh Kumar , Javier Perez-Ramirez and Angelika Brückner, Presented at the Embassy of India, Berlin on 16^th September 2003 on the occasion of Asian Pacific Weeks, Berlin 2003 (Germany).

9. Fe-ZSM-5 catalysts for the selective catalytic reduction of NO_x: Which iron does which job?
M. Schweidder, M. Santhosh Kumar, U. Bentrup, A. Brückner, K.V. Klementiev, W. Grünert–16^th Deutsche Zeolith-Tagung 3^rd-5^th March 2004 at Dresden-Germany

10. Structure and function of iron sites in FeMFI catalysts during N₂O decomposition studied by in-situ EPR and in-situ UV/Vis spectroscopy
M. Santhosh Kumar , Javier Perez-Ramirez and Angelika Brückner-XXXVII. Jahrestreffen Deutscher Katalytiker 17^th-19^th March 2004 at Weimar-Germany.

11. Fe-ZSM-5 catalysts for the selective catalytic reduction of nitric oxide: New way to highly active materials
M. Schweidder, M. Santhosh Kumar, A. Brückner, K.V. Klementiev, W. Grünert -XXXVII. Jahrestreffen Deutscher Katalytiker 17^th-19^th March 2004 at Weimar-Germany

12. Struktue-Wirkungs-Beziehungen in Fe-ZSM-5-Katalysatoren für die selektive Reduction von NO mit NH₃ bzw. Isobutan
M. Schweidder, M. Santhosh Kumar, U. Bentrup, A. Brückner, K.V. Klementiev, W. Grünert -XXXVII. Jahrestreffen Deutscher Katalytiker 17^th-19^th March 2004 at Weimar-Germany

13. Fe-ZSM-5 catalysts for the selective catalytic reduction of NO: Influence of preparation route on structure and catalytic activity
M. Schweidder,F. Heinrich, M. Santhosh Kumar, A. Brückner, W. Grünert – 14^th International Zeolite Conference 25^th-30^th April 2004 at Cape Town-South Africa

14. Active sites for the selective catalytic reduction of NO with NH₃ or isobutane over Fe-ZSM-5: A new view onto a controversial question
M. Schweidder, M. Santhosh Kumar, U. Bentrup, A. Brückner, K.V. Klementiev, W. Grünert-13^th International Conference On Catalysis 11^th-16^th July 2004 at Paris-France

15. Structure and behavior of iron species in Fe-ZSM-5 zeolites in the selective catalytic reduction of NO by NH₃ using in-situ EPR and in-situ UV-Vis-DRS
M. Santhosh Kumar , M. Schweidder, W. Grünert A. Brückner - Post 13^th ICC conference summer school on “In situ and Operando spectroscopy for catalysts” 18^th-21^st July 2004 at Caen-France

16. Active sites in Fe-ZSM-5 catalysts: Structure-Activity Correlations for Selective NO Reduction
M. Schwidder, K. Klementiev, M. Santhosh Kumar, A. Brückner and W. Grünert Deutsche Zeolith Tagung 2^nd-4^th March 2005 at Gießen-Germany

17. Monitoring different iron sites in Fe-ZSM-5 during selective catalytic reduction (SCR) of NO
M. Santhosh Kumar , M. Schwidder, W. Grünert and A. Brückner-XXXVIII. Jahrestreffen Deutscher Katalytiker 16^th-18^th March 2005 at Weimar-Germany

18. Fe-ZSM-5 Catalysts with Tuneable High Activities in NO and N₂O Abatement Reactions: Reactivities, Structure and Identification of Active Sites
M.Schweidder, M. Santhosh Kumar, A. Brückner, J. Pérez-Ramírez, N. Debbagh, K. V. Klementiev, and W. Grünert- International Congress of Environmental Catalysis 5^TH –8^TH June 2005 at Heidelberg-Germany

19. Design of iron zeolite catalysts for N₂O abatement in tail-gases of fluidised bed combustors
M.N.B. Debbagh, C.S.M.deLecea, A.Brückner, M. Santhosh Kumar and J. Pérez-Ramírez International Congress of Environmental Catalysis 5^TH–8^TH June 2005 at Heidelberg-Germany