Title of Talk

Solid-State Polymerization via [2+2] Cycloaddition Reactions in Metal Complexes, CPs and MOFs

 

Abstract

Solid state [2+2] cycloaddition reaction is the most popular one in solid state chemistry and crystal engineering.  Bringing a pair of olefin groups closely in parallel has been accomplished in various organic crystals, coordination polymers (CPs) and MOFs. On the contrary, single crystals of organic polymers or the metal complexes of organic polymeric ligands are not known since they are difficult to crystallize by traditional methods. In this talk, we will discuss how to design photoreactive metal complexes to accomplish metal-complex polymerization. Further we will present our strategies to make monocrystalline metal complexes of organo-polymeric ligands made in situ by [2+2] cycloaddition reaction in CPs and MOFs. We have also accomplished ring opening of the cyclobutane rings in single-crystal to single-crystal manner in a few cases.  One can potentially extend our synthetic strategy to make a range of new metal organo-polymeric framework (MOPF) materials by employing photopolymerization reactions. Such highly mono-crystalline metal complexes of organic polymers were hitherto inaccessible for materials researchers. We strongly feel that this is the first step toward making metal complexes of COFs and true MOF-COF hybrid materials in the near future.

 

 

 

 

References:

1. G.K. Kole and J.J. Vittal, Chem. Soc. Rev. 42 (2013) 1755

2. W.L. Leong and J.J. Vittal, Chem. Rev. 111 (2011) 688

3. G. K. Kole, A.M.P. Peedikakkal, B.M.F. Toh and J.J. Vittal, Chem. A Eur. J. 19(12) (2013) 3962

Jagadese J. Vittal, Professor

 

Department of Chemistry, National University of Singapore,  117543, SINGAPORE

e-mail: chmjjv@nus.edu.sg

Profile. JJ Vittal was born in Tamil Nadu, India. He received his BSc in 1975 from the University of Madras, MSc in 1977 from Madurai University and PhD in 1982 from Indian Institute of Science, Bangalore, India. After completing his postdoctoral research at the University of Western Ontario in Canada, he stayed there to manage the X-Ray Structure Facility at the Department of Chemistry. He then moved to Singapore in 1997 where he is currently Professor in the Department of Chemistry, National University of Singapore. JJ’s broad research interests include inorganic materials and inorganic crystal engineering. He has been investigating solid-state supramolecular structural transformations, hydrogen-bonded coordination polymers, photochemical reactivity in inorganic complexes and coordination polymers, coordination polymeric gel and fiber materials, and fabrication of nanoscale materials by various routes including single molecular precursor routes. He won several awards including Outstanding Researcher Award of NUS in 2011 and Outstanding Scientist Award in 2007. JJ co-authored ‘Crystal Engineering – A Textbook’ with Prof. G.R. Desiraju and Prof. A. Ramanan published by World Scientific in 2011. He edited 2 books in crystal engineering, written several book chapters and reviews and published extensively. He received ~11,000 citations from over 430 publications with h-index of 51 (Web of Knowledge). He is a topic editor of Crystal Growth & Design.

 

Selected Publications

1. M. Nagarathinam, K.Saravanan, J.H. Phua, M. V. Reddy, B. V. R. Chowdari and J. J. Vittal,  Angew. Chem. Int. Ed. 51 (2012) 5866

2. R. Medishetty, L.L. Koh, G.K. Kole and J. J. Vittal, Angew. Chem. Int. Ed., 50 (2011) 10949

3. K. Saravanan, P. Balaya, M.V. Reddy, B.V.R. Chowdari and J.J. Vittal, Energy & Enviorn. Sci. 3 (2010) 457

4. M.H. Mir, L.L. Koh, G.K. Tan and J. J. Vittal, Angew. Chem. Int. Ed., 49,(2010) 390

5. S.K. Batabyal, L. Tian, N. Venkataram, W. Ji and J.J. Vittal, J. Phys. Chem. C 113 (2009) 15037