Inorganic Chemistry Seminar: Dr. Yunho Lee, KAIST

Tue, 2018-08-14 12:00 - 13:00

Dr. Yunho Lee

Coordination Chemistry of 1st-row Transition Metal Pincer Complexes

 Transition metal adduct formations with small molecules such as N2, H2, CO and CO2 are drawing much attention due to their importance in developing synthetic catalysts for various industrial processes. In our laboratory, a series of such species with low-valent 1st row transition metals are currently under investigation. This effort is to show their respective roles in small-molecule transformations that include the COx and NOx (x = 1 – 3) conversions for modeling ACS/CODH active site chemistry and biological denitrification processes, respectively. In this presentation, a particular study with pincer complexes (PEP)M-L (E = N, P or Si and M = Co, Ni, Cu), where the L site is occupied by various ligands such as NHR2, N2, COx and COOR will be discussed. Regarding the geometry and reactivity relationship, a (PPP)M scaffold reveals the interconversion between square planar and tetrahedral geometry in which reversible group transfer occurs between a phosphide moiety and a nickel ion via unanticipated metal-ligand cooperation. This unusual group transfer reaction is tightly coupled with metal’s local geometry and its 0/I/II redox couples. In contrast, a (PNP)M scaffold shows a selective reaction pattern occurring at the structurally rigidified nickel center. With a structurally rigidified acriPNP ligand, a T-shaped nickel(I) metalloradical species was successfully stabilized. Having a sterically exposed half-filled dx2-y2 orbital, this nickel(I) species reveals unique open-shell reactivity. Such modification is successful in selective conversion of CO2. The reduction of {(acriPNP)Ni(CO)}{BF4} also succeeded in generating mono- and zero-valent nickel carbonyl complexes. In fact, the Ni(0)-CO species reveals the selective addition of CO2 to give a nickel(II)-carboxylate species with the expulsion of CO. The closed synthetic cycle for CO2 reduction to CO was finally established with a (acriPNP)Ni system.


·       “Selective Transformation of CO2 to CO at a Single Nickel Center” Acc. Chem. Res., 2018, 51, 1144-1152.

·       “Direct CO2 addition to a Ni(0)-CO species allowing the selective generation of a nickel(II) carboxylate with expulsion of CO” J. Am. Chem. Soc., 2018, 140, 2179-2185.

·       “A T-Shaped Ni(I) Metalloradical Species” Angew. Chem., Int. Ed. 2017, 56, 9502.

·       “Carbon Dioxide Binding at a Ni/Fe Center; Synthesis and Characterization of Ni(η1-CO2-κC) and Ni-μ-CO2-κC:κ2O,O’-Fe” Chem. Sci. 2017, 8, 600.

·       “Phosphinite-Ni0 Mediated Formation of a Phosphide-NiII-OCOOMe Species via Uncommon Metal-Ligand Cooperation.” J. Am. Chem. Soc. 2015, 137, 4280.


Carol Lynch Lecture Hall

Chemistry Complex

Host: Dr. Mindiola


Physical Chemistry Seminar: Dr. John Mauro, Pennsylvania State University

Thu, 2018-08-30 13:00 - 14:00

Dr. John Mauro

Relaxation is Everywhere
As a nonequilibrium material, a glass is continually relaxing towards its metastable supercooled liquid state.  A comprehensive understanding of glass relaxation is of critical importance for many high-tech applications of glass, including optical fiber, glass substrates for liquid crystal displays, and chemically strengthened cover glass for electronic devices.  In this presentation, I will review the current state-of-the-art in understanding the dynamics of glass relaxation, including the physical origins of its non-Arrhenius and non-exponential characters

Carol Lynch Lecture Hall

Chemistry Complex

Host Dr. Fakhraai


Organic Chemistry Seminar:Dr.Tetsuo Narumi, Shizuoka Univeristy

Fri, 2018-08-24 12:00 - 13:00

Dr. Tetsuo Narumi

Title: Amide-to-Alkene Isosteric Switch Strategy: Peptidomimetic Synthesis and Their Application to Study on Amyloid Fibril Formatio


Carol Lynch Lecture Hall

Chemistry Complex

Host: Dr. Petersson



Tom Mallouk Joining Penn Chemistry

Prof. Thomas Mallouk, who is currently the Evan Pugh University Professor of Chemistry, Biochemistry and Molecular Biology, Physics, and Engineering Science and Mechanics at Penn State University will be joining the Penn Chemistry Department as the second Vagelos Chair in Energy Research in the Department of Chemistry, effective March 2019. A member of the National Academy of Sciences, Tom is perhaps best known for his groundbreaking work leading to fundamental advances in our understanding of materials chemistry and nanoscience.


Megan Matthews Named Scialog CMC Fellow

Assistant Professor Megan Matthews has been named a Scialog Fellow on the Chemical Machinery of the Cell by the Research Corporation and the Gordon and Betty Moore Foundation. More information on the program can be found here.

David Christianson to be next Department Chair

David Christianson, Roy and Diana Vagelos Professor in Chemistry and Chemical Biology, will assume the role of Department Chair effective July 1, 2018. David succeeds Gary Molander, the Hirschmann-Makineni Professor of Chemistry, who has served as Chair for the past 9 years.


James Petersson Honored by Penn Medical School

Associate Professor James Petersson is a co-recipient of the 2018 Jane M. Glick Graduate Student Teaching Award. The award was established in 2010 by the Glick family in remembrance of Dr. Jane Glick and her dedication to the Biomedical Graduate Studies programs. The award is given to those faculty that have demonstrated a "commitment to educating and training the next generation of scientists that exemplifies the type of scientist and educator Jane Glick represented."

Corporate Recruiting Special Event

Fri, 2018-06-15 09:00 - 11:00

Dr. Page McAndrew

West Pharmaceutical Services

Room 2000 Vagelos

Resumes, Interviewing, & Industrial R&D


Join Penn Chemistry alum Page McAndrew (MacDiarmid group) as he offers a workshop with practical advice on job search skills for industrial positions.


Dissertation Defense - Wenjie Dou (Subotnik Group)

Tue, 2018-06-05 14:00 - 15:00
Lynch Lecture Hall





Department of Chemistry

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215.898.8317 voice | 215.573.2112 fax |

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