个人简介

B.A., 1986, College of Wooster Ph.D., 1991, University of Massachusetts, Amherst Postdoctoral fellow, 1991-1993, The Ohio State University Research Scientist, 1993-1994, R.W. Johnson Pharmaceutical Research Institute Assistant professor, 1994-1997, Colgate University

研究领域

Physical Organic Chemistry

Solar Energy Conversion, Organic Photovoltaics, Artificial Photosynthesis, Dendrimer synthesis, Electron-Transfer Reactions, Time-Resolved Laser Spectroscopy, Single Molecule Spectroscopy, Photophysics and Photochemistry. My group combines synthetic chemistry with ultrafast laser spectroscopy and single molecule spectroscopy to study the electronic properties of molecules, polymers, and materials. All of our work involves understanding these electronic properties from a physical organic and materials point of view. The properties of both molecules and supramolecular assemblies (i.e., photovoltaic devices) are directly affected by structure. Synthesis and Ultrafast Time-Resolved Spectroscopy of Organic Photovoltaics Photovoltaic devices (PDs) are designed to convert solar energy into electricity. Our research on organic PDs is focused on developing new paradigms in PD design by synthesizing self-assembled electron-donor and electron-acceptor arrays. We use ultrafast laser spectroscopy on the femtosecond and picosecond time scales to study energy and electron transfer in these compounds. The results from these experiments are translated into preparing new organic PDs. Monitoring Organic Catalysis: Time-Resolved Fluorescence Anisotropy of Chiral Dendrimers A second area of research in our group is the study, in real time, of enantioselective reactions catalyzed by chiral dendrimeric catalysts. We use single molecule fluorescence spectroscopy and time-resolved fluorescence anisotropy measurements to examine the time dependent changes in dendrimer structure occurring as catalysis takes place. This research is expected to have far-reaching implications in catalysis as well as biological chemistry. Electron-Transfer in Photosynthetic Reaction Center Mimics The photosynthetic reaction center in green plants and purple bacteria utilizes light to initiate a series of electron-transfer steps that transports an electron over extremely long distances. A third area of research in our group involves the synthesis and study of photosynthetic mimics, that is, nanoscale molecules that are designed to replicate the complex and elegant process of electron-transfer in biological systems. The photosynthetic mimics synthesized and studied in our research group are based upon dendrimers that contain porphyrins or porphyrin analogs at the core of the dendrimer and electron acceptor groups as end-groups. Photophysical Properties of Unusual Porphyrins and Porphyrinoids Within our group we also study the optical properties (steady state and ultrafast time-resolved) of unusual porphyrins and porphyrinoids. We have recently studied the photophysical properties of N-confused porphyrins, corroles and octaphyrins using these techniques.

近期论文

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Mehr, H.S.; Romano, N.C..;Altamimi, R.; Modarelli, J.M.; Modarelli, D.A. "Core-Substituted Naphthalene Diimide - Metallo Bisterpyridine Supramolecular Polymers: Synthesis, Photophysics and Morphology" Dalton Transactions 2014, submitted for publication. Liu, H.; Espe, M.; Modarelli, D.A.; Arias, E.; Moggio, I.; Ziolo, R.F.; Heinz, H. "Interaction of Substituted Poly(Phenylethynylenes) with Ligand-Stabilized CdS Nanoparticles" J. Mater. Chem. A 2014, 2, 8705 – 8711. Tu, S.; Kim, S.H.; Joseph, J.; Modarelli, D.A.; Parquette, J.R. "Proton-Coupled Self-Assembly of a Porphyrin Naphthalenediimide (NDI) Dyad" ChemPhysChem 2013, 14, 1609 – 1617. Wang, C.-L.; Zhang, W.-B.; Yu, X.; Yue, K.; Sun, H.-J.; Hsu, C.-H.; Hsu, C.-S.; Jospeh, J.; Modarelli, D.A.; Cheng, S.Z.D. "Facile Synthesis and Photophysical Properties of Sphere-Square Shape Amphiphiles Based on Porphyrin-[60]Fullerene Conjugates" Chem. Asian J. 2013, 8, 947 – 955. Acharya,Rajendra; Paudel, Liladhar; Joseph, Jojo; McCarthy, Claire E.; Dudipala, Venkat R.; Modarelli, Jody M.; Modarelli, David A. "Synthesis of Three Asymmetric N-Confused Porphyrins" J. Org. Chem. 2012, 77(14), , 6043–6050. Hassan, Mohammad L.; Moorefield, Charles M.; Elbatal, Hany S.; Newkome, George R.; Modarelli, David A.; Romano, Natalie C. "Fluorescent cellulose nanocrystals via supramolecular assembly of terpyridine-modified cellulose nanocrystals and terpyridine-modified perylene"Materials Science & Engineering, B: Advanced Functional Solid-State Materials 2012, 177(4), 350-358. Tu, S.; Kim, S.H.; Joseph, J.; Modarelli, D.A.; Parquette, J.R. "Self-Assembly of a Donor-Acceptor Nanotube. A Strategy to Create Bicontinuous Arrays" J. Am. Chem. Soc. 2011, 133(47), 19125-19130. Alemán, E.A.; Manriquez Rocha, J.; Wongwitwichote, W.; Godinez Mora-Tova, L.A.; Modarelli, D.A. "Spectroscopy of Free-Base N-Confused Tetraphenylporpyrin Radical Cation and Radical Anion" J. Phys. Chem. A 2011, 115, 6456–6471. Shao, H.; Seifert, J.; Romano, N.C.; Gao, M.; Helmus, J.J.; Jaroniec, C.P.; Modarelli, D.A.; Parquette, J.R. “Amphiphilic Self-Assembly of an n-type Nanotube”, Angew. Chem., 2010, 49, 7688 –7691. November Cover Page and a Very Important Paper. Wang, J.-L.; Chan, Y.-T.; Moorefield, C.N.; Pei, J.; Modarelli, D.A.; Romano, N.C.; Newkome, G.R. "Shape-Persistent, Truxene-Based Nano-Sized Bisterpyridine Ruthenium(II) Complexes: Synthesis and Photophysical Properties" Macromol. Rapid Commun. 2010, 31, 850–855. Zhou, L.; Soucek, M.D.; Alemán, E.A.; Modarelli, D.A. "Attenuation of UV-Absorption and Size of Silica/Titanium Colloids Using a Core-Shell Approach" Silicon 2010, published online January 29, 2010, 10.1007/s12633-009-9030-2 Shao, H.; Nguyen, T.; Romano, N.C.; Modarelli, D.A.; Parquette, J.R. “Self-Assembly of 1-D n-Type Nanostructures based on Naphthalene Diimide-appended Dipeptides” J. Am. Chem. Soc. 2009, 131(45), 16374–16376. Alemán, E.A.; Shreiner, C.D.; Rajesh, C.S.; Smith, T.; Garrison, S.A.; Modarelli, D.A. Dalton Transactions 2009, 6562 – 6567. Vyas, S.; Hadad, C.; Modarelli, D.A. "TDDFT Calculations of the Structure and Absorption Spectra of Free-Base N-Confused Porphyrin and N-Confused Tetraphenylporphyrin" J. Phys. Chem. A 2008, 112, 6533–6549. Smith, T.; Modarelli, D.A. "The Efficient Synthesis of Unsymmetrical Oligo(phenylenevinylenes) Tetrahedron Lett. 2008, 49, 526 - 528 (doi:10.1016/j.tetlet.2007.11.073). Alemán, E.A.; Rajesh, C.S.; Ziegler, C.J.; Modarelli, D.A. "Ultrafast Spectroscopy of Free Base N-Confused Porphyrins" J. Phys. Chem. A 2006, 110, 8605-8612. Watchara Anannarukan, Supawan Tantayanon, Dong Zhang, Elvin A. Alemán, David A. Modarelli and Frank W. Harris "Soluble Polyimides Containing Trans-Diaminotetraphenylporphyrin: Synthesis and Photoinduced Electron Transfer Polymer" Polymer 2006, 47, 4936-4945. Ding, T.; Alemán, E.A.; Rajesh, C.S.; Modarelli, D.A.; Ziegler, C.J. "Photophysical Properties of a Series of Free Base Corroles" J. Phys. Chem. A 2005, 109, 7411 - 7417. Shaw, J.L.; Wolff, S.A.; Alemán, E.A.; Ziegler, C.J.; Modarelli, D.A. "Synthesis and Spectroscopy of a Series of Substituted N-Confused Tetraphenylporphyrins" J. Org. Chem. 2004, 69, 7423-7427. Wolff, S.A.; Alemán, E.A.; Banerjee, D.; Rinaldi, P.L.; Modarelli, D.A. "One-Step Synthesis and Characterization of Difunctionalized N-Confused Tetraphenylporphyrins" J. Org. Chem. 2004, 69, 4571-4576.