个人简介

Ph.D., University of Hawaii, Honolulu, 1974 Postdoctorate, University of Western Ontario, London, 1974-75; Columbia University, New York, 1975-78

研究领域

Organic photochemistry, solid-state chemistry, supramolecular chemistry

Controlling Photochemistry with Cations and Confinement Photochemistry in Bowls, Baskets, Cages and Cavities Life sustaining highly specific chemical reactions occur in the confined and organized medium of protein. Our projects aimed at achieving similar selectivity in (photo)chemical reactions explore the use of readily available hosts that bear similarity to biological media. In our laboratory, spatially confined cavities provided by crystals, zeolites, polymers (nafions), and water-soluble cyclodextrins (natural and functionalized), organic hosts, micelles and dendrimers are currently being explored as reaction media. Photophysical and photochemical probes as well as structural tools are generously utilized in our research to define the characteristics of confined reaction cavities prior to employing them as reaction media. Our research interests involving synthesis of organic molecules, X-ray crystallography, solid state NMR, spectroscopic structural tools such as UV, IR and NMR, 2D-NMR, steady state and time resolved emission spectroscopy, and computational methods provide well-rounded experimental skills to students. Our projects encompassing concepts from currently popular topics such as nano-chemistry, supramolecular chemistry and green chemistry serve to train students in the broader areas of physical organic chemistry and photochemistry.

近期论文

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Control of spin-spin exchange interactions in polynitroxides through inclusion within -cyclodextrin, M. Porel,M. F. Ottaviani, S. Jockusch, N. J. Turro andV. Ramamurthy, RSC Advances, 2013, 3, 427. Photodimerization of Hydrophobic Guests within a Water Soluble Nanocapsule A. Parthasarathy, S. R. Samanta and V. Ramamurthy, Res. Chem. Intermed., 2013, 39, 73-87 (special issue dedicated to K. Mizuno) Hydrocarbons depending on the chain length and head group adopt different conformations within a water-soluble nanocapsule: 1H NMR and molecular dynamics studies R. Choudhury, A. Barman, R. Prabhakar and V. Ramamurthy, J. Phys. Chem. B, 2013, 117, 398–407. Chloride sensing via suppression of excited state intramolecular proton transfer in squaramides M. Porel, V. Ramalingam, M.E. Domaradzki, V. G. Young, V. Ramamurthy and R. S. Muthyala, Chem. Commun., 2013, 49, 1633-1635. Deep- Cavity Cavitand Octa Acid as a Hydrogen donor: Photofunctionalization with Nitrenes Generated from Azidoadamantanes R. Choudhury,S. Gupta,J. P. Da Silva and V. Ramamurthy, J. Org. Chem., 2013, 78, 1824-1832. Role of free space and conformational control on photoproduct selectivity of optically pure alpha-alkyldeoxybenzoins within a water-soluble organic capsule R. Kulasekharan; M. Maddipatla; A. Parthasarathy and V. Ramamurthy, J. Org. Chem., 2013, 78, 942-949. Efficient Singlet-Singlet Energy Transfer in a Novel Host-Guest Assembly Composed of an Organic Cavitand, Aromatic Molecules and Clay Nano-sheet Y. Ishida, R. Kulasekharan, T. Shimada, S. Takagi, and V. Ramamurthy, Langmuir, 2013, 29, 1748-1753. Photochemical Reaction Containers as Energy and Electron Transfer Agents P. Jagadesan, B. Mondal, A. Parthasarathy, V. Jayathirtha Rao and V. Ramamurthy, Org. Letters, 2013, 15, 1326-1329. Release of guests from encapsulated masked hydrophobic precursors by a phototrigger N. Jayaraj,P. Jagadesan, S. R.Samanta, J. P. Da Silva and V. Ramamurthy, Org. Letters, 2013, 15, 4374-4377. Synthesis, Characterization, Guest Inclusion and Photophysical Studies of Gold Nanoparticles Stabilized with Carboxylic Acid Groups of Organic Cavitands B. Mondal, N. Kamatham, S. R. Samanta, P. Jagadesan, J. He and V. Ramamurthy, Langmuir, 2013, 29, 12703–12709. Capsular complexes of non-polar guests with octa amine host detected in the gas phase J. P. Da Silva, R. Kulasekharan, C. Cordeiro, S. Jockusch, N. J. Turro and V. Ramamurthy, Org. Letters, 2012, 14, 560-563. Photoinduced Electron Transfer Between a Donor and an Acceptor Separated by a Capsular Wall M. Porel, S. Jockusch, A. Parthasarathy. V. Jayathirtha Rao, N. J. Turro and V. Ramamurthy, Chem. Commun., 2012, 48, 2710 - 2712. Excited State Chemistry of New Capsular Assemblies in Aqueous Solution and on Silica Surfaces, E. Ramasamy, N. Jayaraj, M. Porel and V. Ramamurthy, Langmuir, 2012, 28, 10-16. Photoinduced Electron Transfer Across a Molecular Wall: Coumarin Dyes as Donors and Methyl viologen and TiO2 as Acceptors M. Porel, A. Klimczak, M. Freitag, E. Galoppini and V. Ramamurthy, Langmuir, 2012, 28, 3355-3359. Dynamic Internal Cavities of Dendrimers as Constrained Media. A Study of Photochemical Isomerizations of Stilbene and Azobenzene Using Poly(Alkyl Aryl Ether) Dendrimers B. Natarajan, S. Gupta, N. Jayaraj, V. Ramamurthy, N. Jayaraman, J. Org. Chem., 2012,77, 2219-2224. Cucurbituril Adamantanediazirine Complexes and Consequential Carbene Chemistry S. Gupta, R. Choudhury, D. Krois, U. H. Brinker and V. Ramamurthy, J. Org. Chem., 2012, 77, 5150–5160. Gold Nanoparticles Functionalized With Deep-cavity Cavitands: Synthesis, Characterization and Photophysical Studies S. R. Samanta, R. Kulasekharan, R, Choudhury, P. Jagadesan, N. Jayaraj and V. Ramamurthy, Langmuir, 2012, 28, 11920-11928 Supramolecular Control During Triplet Sensitized Geometric Isomerization of Stilbenes Encapsulated in a Water Soluble Organic Capsule S. R. Samanta, A. Parthasarathy and V. Ramamurthy, Photochemical & Photobiological Sciences, 2012, 11, 1652-1660 (special issue dedicated to J. P. Desvergne) Ultrafast Photoinduced Electron Transfer Between an Incarcertaed Donor and a Free Acceptor in Aqueous Solution M. Porel, C. H. Chuang, C. Burda and V. Ramamurthy, J. Am. Chem. Soc., 2012, 134, 14718-14721. Regioselective photodimerization of pyridyl-butadienes within cucurbit[8]uril cavities. M. V. S. N. Maddipatla, M. Pattabiraman, A. Natarajan, K. Srivastav, J. T. Mague, V.Ramamaurthy, Org. Biomol. Chem., 2012, 10, 9219-9222.