Klausen, Rebekka - The Johns Hopkins University

个人简介

POSITIONS 2019 to present Second Decade Society Associate Professor Department of Chemistry Johns Hopkins University 2018 to 2019 Second Decade Society Assistant Professor Department of Chemistry Johns Hopkins University 2013 to 2018 Assistant Professor Department of Chemistry Johns Hopkins University EDUCATION & TRAINING 2011 to 2013 Columbia University, New York, NY Department of Chemistry Postdoctoral Scholar with Prof. Colin Nuckolls 2005 to 2011 Harvard University, Cambridge, MA Department of Chemistry and Chemical Biology Ph.D. with Prof. Eric N. Jacobsen 2001 to 2005 Boston College, Chestnut Hill, MA Department of Chemistry B.S. cum laude, research with Prof. Steven D. Bruner AWARDS & RECOGNITIONS 2022, ACS Macro Lett / Biomacromolecules / Macromolecules Young Investigator Award. 2022, Finalist, Blavatnik National Award (Chemistry). 2021, ACS Award in Pure Chemistry, American Chemical Society, 2021. 2021, Finalist, Blavatnik National Award (Chemistry). 2018, CAREER Award, National Science Foundation. 2017, Marion Milligan Mason Award, American Association for the Advancement of Science. 2017, Sloan Research Fellowship. 2017, American Chemical Society Division of Organic Chemistry (ORGN) Young Academic Investigator. 2017, American Chemical Society Division of Polymeric Materials: Science & Engineering(PMSE) Young Investigator. 2017, Johns Hopkins University Catalyst Award. 2016, George and Monique C. Braude Award, MD Division of the American Chemical Society. 2015, Early Career Research Award, Department of Energy. 2015, Doctoral New Investigator, Petroleum Research Fund.

研究领域

Innovative synthetic chemistry for energy-relevant materials. Structure determines function. Strategic synthesis is a powerful tool for the construction of complex functional chemical architectures. We design and synthesize novel molecular building blocks to construct exciting nanoscale materials. Research in the Klausen Group focuses on organosilicon and BN materials. Recent results from both programs are highlighted below. Poly(cyclosilane)s are a new class of conductive polymers inspired by crystalline silicon, the semiconductor behind solar cells and computer chips. These materials have promise as low-cost replacements for silicon itself. BN 2-Vinylnaphthalene (BN2VN) is a versatile vinyl monomer that exhibits styrene-like reactivity. Postpolymerization functionalization provides tailored functional polymers.

近期论文

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Wakefield, H.; Kevlishvili, I.; Wentz, K. E.; Yao, Y.; Kouznetsova, T. B.; Melvin, S. J.; Ambrosius, E. G.; Herzog-Arbeitman, A.; Siegler, M. A.; Johnson, J. A.; Craig, S. L.; Kulik, H. J.; Klausen, R. S.* "Synthesis and Ring-Opening Metathesis Polymerization of a Strained trans-Silacycloheptene and Single-Molecule Mechanics of Its Polymer" J. Am. Chem. Soc., 2023, ASAP, DOI: 10.1021/jacs.3c01004. Guan, W.; Lu, L.; Jiang, Q.; Gittens, A. F.; Wang, Y.; Novaes, L.; Klausen, R. S.*; Lin, S.* "Electrochemical logic to synthesize disilanes and oligosilanes from chlorosilanes", ChemRxiv, 2023. Husted, K. E. L.; Brown, C.M.; Shieh, P.; Kevlishvili, I.; Kristufek, S. L.; Accardo, J. V.; Cooper, J. C.; Zafar, H.; Klausen, R. S.; Kulik, H. J.; Moore, J. S.; Sottos, N. R.; Kalow, J. A.; Johnson, J. A.* “Remolding and deconstruction of industrial thermosets via carboxylic acid-catalyzed bifunctional silyl ether exchange.” J. Am. Chem. Soc., 2023, 145, 1916–1923. Gittens, A. F.; Jiang, Q.; Siegler, M. A.; Klausen, R.S.* "Conjugation in isomeric cyclosilane thioethers." Organometallics, 2022, 41, 3762. Ji, Y.; Catazaro, J.; Jiang, Q.; Melvin, S. J.; Jiang, J.; Klausen, R. S.* "Characterization of styrene-vinyl alcohol copolymers by CP-MAS NMR spectroscopy." Macromolecules, 2022, 55, 7032–7038. Jiang, Q.; Gittens, A. F.; Wong, S.; Siegler, M. A.; Klausen, R. S.* "Highly selective addition of cyclosilanes to alkynes enabling new conjugated materials." Chem. Sci., 2022, 13, 7587-7593. Fang, F.; Jiang, Q.; Klausen, R. S. "Poly(cyclosilane) Connectivity Tunes Optical Absorbance." J. Am. Chem. Soc., 2022, 144, 7834-7843. DOI: 10.1021/jacs.2c01820. Wakefield, H. IV; Jiang, Q.; Klausen, R. S. "Azaborine Isomer Effects on Benzylic Ion Stability and Reactivity: Consequences for BN2VN Ionic Polymerization." Org. Biomol. Chem., 2022, 20, 1407–141. Ballestero-Martinez, E.; Ferguson, J. T.; Siegler, M. A.; Klausen, R. S. "Isolation of a Cyclopentasilane from Magnesium Reduction of a Linear Hexasilane." Eur. J. Org. Chem., 2021, Accepted, DOI: 10.1002/ejoc.202100768. Barrett, B. J.; Jimenez, D.; Klausen, R. S.*; Bragg, A. E.* "Intramolecular Photoinduced Charge Transfer and Recombination Dynamics in Vinylarene Terminated Organosilanes." J. Phys. Chem. B, 2021, Accepted, DOI: 10.1021/acs.jpcb.1c01297. Ji, Y.; Klausen, R.S. "Chain Transfer to Solvent in BN 2-Vinylnaphthalene Polymerization" J. Polym. Sci., 2021, Accepted Article, DOI: 10.1002/pol.20210362. Jiang, Q.; Wong, S.; Klausen, R. S. "Effect of Polycyclosilane Microstructure on Thermal Properties." Polym. Chem., 2021, Advance Article, DOI: 10.1039/D1PY00383F. Ferguson, J. T.; Jiang, Q.; Marro, E. A.; Siegler, M. A.; Klausen, R. S. "Long-range Coupling in Cyclic Silanes." Dalton. Trans., 2020, 49, 14951-14961. Folster, C. P.; Nguyen, P. N.; Klausen, R. S. "Reductive Halocyclosilazane Polymerization." Dalton Trans. 2020, 49, 16125-16132. Ji, Y.; Zhou, T.; van de Wouw, H. L.; Klausen, R. S. "Organoborane Strategy for Polymers Bearing Lactone, Ester, and Alcohol Functionality." Macromolecules, 2020, 53, 249-255. Burns, D. A.; Press, E. M.; Siegler, M. A.; Klausen, R. S.; Thoi, V. S. "2D Oligosilyl Metal–Organic Frameworks as Multi‐state Switchable Materials" Angew. Chem. Int. Ed. 2020, 132, 773-778. Dorn, R. W.; Marro, E. A.; Hanrahan, M. P.; Klausen, R. S.; Rossini, A. J. "Investigating the Microstructure of Poly(cyclosilane) by 29Si Solid-State NMR Spectroscopy and DFT Calculations." Chem. Mater. 2019, 31, 9168-9178. Marro, E. A.; Folster, C. P.; Press, E. M.; Im, H.; Ferguson, J. T.; Siegler, M. A.; Klausen, R. S. "Stereocontrolled Syntheses of Functionalized cis- and trans-Siladecalins." J. Am. Chem. Soc. 2019, 141, 17926-17936. Folster, C. P.; Nguyen, P. N.; Siegler, M. A.; Klausen, R. S. "Tunable SiN Conjugated Materials." Organometallics, 2019, 38, 2902-2909. Marro, E. A.; Klausen, R. S. "Conjugated Polymers Inspired by Crystalline Silicon." Chem. Mater. 2019, 31, 2202-2211. van de Wouw, H. L.; Klausen, R. S. "BN Polystyrenes: Emerging Optical Materials and Versatile Intermediates." J. Org. Chem., 2019, 84, 1117-1125. Purkait, T. K.; Press, E. M.; Marro, E. A,; Siegler, M. A.; Klausen, R. S. "Low-Energy Transition in SiB Rings" Organometallics 2019, 38, 1688-1698. Mendis, S. N.; Zhou, T.; Klausen, R. S. "Syndioselective Polymerization of a BN Aromatic Vinyl Monomer" Macromolecules 2018, 51, 6859-6864. van de Wouw, H. L.; Awuyah, E. C.; Baris, J. I.; Klausen, R. S. "An Organoborane Vinyl Monomer with Styrene-like Radical Reactivity: Reactivity Ratios and Role of Aromaticity" Macromolecules 2018, 51, 6359-6368. Marro, E. A.; Press, E. M.; Siegler, M. A.; Klausen, R. S. "Directional Building Blocks Determine Linear and Cyclic Silicon Architectures" J. Am. Chem. Soc. 2018, 140, 5976-5986. Folster, C. P.; Klausen, R. S. "Metallocene Influence on Poly(Cyclosilane) Structure and Properties." Polym. Chem. 2018, 9, 1938-1941. van de Wouw, H. L.; Lee, J. Y.; Awuyah, E. C.; Klausen, R. S. "A BN Aromatic Ring Strategy for Tunable Hydroxyl Content in Polystyrene." Angew. Chem. Int. Ed. 2018, 57, 1673-1677. Marro, E. A.; Press, E. M.; Purkait, T. K.; Jimenez, D.; Siegler, M. A.; Klausen, R. S. "Cooperative Noncovalent Interactions Induce Ion Pair Separation in Diphenylsilanides." Chem. Eur. J. 2017, 23, 15633-15637. van de Wouw, H. L.; Lee, J. Y.; Klausen, R. S. "Gram-Scale Free Radical Polymerization of an Azaborine Vinyl Monomer." Chem. Commun. 2017, 53, 7262-7265. Zhou, J.; Folster, C. P.; Surampudi, S. K.; Jimenez, D.; Klausen, R. S.; Bragg, A. E. "Asymmetric Charge Separation and Recombination in Symmetrically Functionalized s-p Hybrid Oligosilanes." Dalton Trans., 2017, 46, 8716-8726. Press, E. M.; Marro, E. A.; Surampudi, S. K.; Siegler, M. A.; Tang, J. A.; Klausen, R. S. "Synthesis of a Fragment of Crystalline Silicon: Poly(Cyclosilane)." Angew. Chem. Int. Ed., 2017, 56, 568-572. Zhou, J.; Surampudi, S. K.; Bragg, A. E.; Klausen, R. S. "Photoinduced Charge Separation in Molecular Silicon." Chem. Eur. J., 2016, 22, 6204-6207. van de Wouw, H. L.; Lee, J. Y.; Siegler, M. A.; Klausen, R. S. "Innocent BN Bond Substitution in Anthracene Derivatives." Org. Biomol. Chem., 2016, 14, 3256-3263. van de Wouw, H. L.; Chamorro, J.; Quintero, M.; Klausen, R. S."Opposites Attract: Organic Charge Transfer Salts." J. Chem. Educ., 2015, 92, 2134-2139. Surampudi, S.; Yeh, M.-L.; Siegler, M. A.; Hardigree, J. F. M.; Kasl, T. A.; Katz, H. E.; Klausen, R. S. “Increased Carrier Mobility in End-Functionalized Oligosilanes.” Chem. Sci., 2015, 6, 1905-1909. Klausen, R. S.; Kennedy, C. R.; Hyde, A. M.; Jacobsen, E. N. "Chiral Thioureas Promote Enantioselective Pictect-Spengler Cyclization by Stabilizing Every Intermediate and Transition State in the Carboxylic-Acid Catalyzed Reaction." J. Am. Chem. Soc., 2017, 139, 12299–12309. Su, T. A.; Li, H.; Klausen, R. S.; Kim, N. T.; Neupane, M.; Leighton, J. L.; Steigerwald, M. L.; Venkataraman, L.; Nuckolls, C. "Silane and Germane Electronics." Acc. Chem. Res. 2017, 50, 1088-1095. Su, T. A.; Li, H.; Klausen, R. S.; Widawsky, J. R.; Batra, A.; Steigerwald, M. L.; Venkataraman, L.; Nuckolls, C. "Tuning Conductance in π–σ–π Single–Molecule Wires." J. Am. Chem. Soc., 2016, 138, 7791-7795. Su, T. A.; Li, H.; Neupane, M.; Batra, A.; Klausen, R. S.; Kumar, B.; Steigerwald, M. L.; Venkataraman, L.; Nuckolls, C. "Single-Molecule Conductance in Atomically Precise Germanium Wires." J. Am. Chem. Soc. 2015, 137, 12400-12405. Klausen, R. S.; Widawsky, J.; Su, T. A.; Li, H.; Steigerwald, M. L.; Venkataraman, L.; Nuckolls, C. “Atomic Components in Fluorene Circuits.” Chem. Sci., 2014, 5, 1561-1564. Su, T. A.; Widawsky, J. R.; Li, H.; Klausen, R. S.; Leighton, J.; Steigerwald, M. L.; Venkataraman, L.; Nuckolls, C. “Silicon Ring Strain Creates High Conductance Pathways in Single-Molecule Circuits.” J. Am. Chem. Soc. 2013, 135, 18331–18334. Klausen, R. S.; Widawsky, J.; Steigerwald, M. L.; Venkataraman, L.; Nuckolls, C. “Conductive Molecular Silicon.” J. Am. Chem. Soc. 2012, 134, 4541-4544. Ahn, S.; Aradhya, S. V.; Klausen, R. S.; Capozzi, B.; Roy, X.; Steigerwald, M. L.; Nuckolls, C.; Venkataraman, L. “Electronic Transport and Mechanical Stability of Carboxyl Linked Single Molecule Junctions.” Phys. Chem. Chem. Phys. 2012, 14, 13841–13845. Yunmi, L.; Klausen, R. S.; Jacobsen, E. N. “Practical Enantioselective Synthesis of Tetrahydro-gamma-carbolines Catalyzed by a Chiral Thiourea and Benzoic Acid.” Org. Lett. 2011, 13, 5564-5567. Klausen, R. S.; Jacobsen, E. N. “Weak Brønsted Acid-Thiourea Co-catalysis: Enantioselective, Catalytic Protio-PictetSpengler Reactions.” Org. Lett. 2009, 11, 887-890.