Events Archive

Friday, October 11, 2019 - 3:10pm

Brad Carrow

Brad Carrow

Department of Chemistry, Princeton University

(Stanley)

A general approach by our group for the development of new catalytic synthetic methods that occur with higher efficiency and selectivity, use simpler reagents, and proceed with lower energy demand involves new ancillary ligand design coupled with fundamental studies of how metal-ligand bonding dictates catalytic reactivity. In this context, the presentation will focus on our recent efforts to discover new phosphorus- and sulfur-based ligands and associated metal catalysts that manifest special properties from seemingly "weak" interactions, for instance dispersion. In one case, low-coordinate Pd complexes possessing polarizable diamondoid substituents are shown to enable a new transmetalation mechanism under exceptionally mild conditions, facilitate the first ever characterization and reactivity studies of monoligated Pd(0) – the true active catalyst in modern cross-coupling reactions, and direct visible light-induced bond weakening. Studies of oxidative dehydrogenative coupling reactions will also showcase evidence for a distinct C−H bond activation mechanism that we describe as electrophilic CMD or "eCMD", which has characteristics distinct from the established concerted metalation-deprotonation (CMD) pathway for C−H functionalization. Transition state analyses suggest this reaction pathway could be a general class of C−H activation that to date has been convoluted with CMD, and selection rules have been identified for predicting what catalyst structures manifest either classic CMD or eCMD, each of which occurs with characteristic substrate preferences and selectivity.

Friday, October 11, 2019 - 1:10pm

Brett VanVeller


Promotion Seminar


Brett VanVeller


Department of Chemistry, Iowa State University


(Jenks)

Friday, October 4, 2019 - 3:10pm

Stacey Lowery Bretz

Stacey Lowery Bretz

Department of Chemistry & Biochemistry, Miami University

(Holme)

Learning chemistry requires students to become fluent in the symbolic language of chemistry. Developing expertise, however, requires that students move beyond manipulating symbols to create explanations using particulate models of matter for observations in the laboratory. Failure to accurately interpret and connect these multiple representations of matter is one source of students’ misconceptions. Our research group designs measurement tools to advance our understanding of how students understand and interpret representations for a variety of core concepts. Creating such measures presents multiple challenges with regard to establishing the precision and accuracy of the data. Insights regarding the underlying assumptions and appropriateness of commonly used psychometrics will be examined. Findings regarding students’ reasoning and misconceptions will be presented with examples drawn from general chemistry, organic chemistry, physical chemistry, and biochemistry courses. 

Friday, October 4, 2019 - 1:10pm

Daniela Radu


Daniela Radu


Department of Mechanical & Materials Engineering, Florida International University


(Miller)


Nanoscale precursors have been found useful in thin film generating for a variety of applications, from optoelectronics to medical devices. When endowed with adequate functionality, nanostructured chalcogenides are readily dispersible in various solvents to create colloidal solutions. Such dispersions, often called inks, could be easily coated in large areas on conducting substrates, conferring an inexpensive and robust method to construct thin films that could be useful in a plethora of applications, including energy generation; specifically, in thin-film photovoltaics. The processing required for obtaining uniform and dense nanostructured coatings is governed by the ability to tailor particle size, particle size distribution, nanoprecursors' surface and to select appropriate dispersion reagents. Each type of nanostructure is unique, and finding a specific set of conditions requires an in-depth analysis of properties such as surface identity and morphology. With melting occurring at several hundred degrees lower than the melting point in bulk, the thermal treatment of NP precursors enables fabrication of uniform, crystalline thin-films on inexpensive substrates which only sustain moderate processing temperatures.  The operating hypothesis is that the final crystalline film will mirror the nanoprecursors composition prior to the thermal treatment. Therefore, tremendous efforts have been reported toward rigorous control of nanoparticles composition.


The presentation will outline our discoveries in the synthesis of nanostructured materials for thin-film chalcogenide photovoltaics (PV), including Cu2ZnSnS4, Fe2GeS4, and Cu3VS4, and will dive into preparative methods for a new class of materials, 2D chalcogenides, the focus of our most recent endeavors.

Friday, September 27, 2019 - 3:10pm

Kit ChapmanKit Chapman


Science Journalist, Bloomsbury Sigma Publishing


(Winter)


Kit Chapman will tell the thrilling history of creating elements past uranium - from the first steps during the Manhattan Project to the modern experiments rewriting our understanding of the chemical world. From flying planes into mushroom clouds to some of the most powerful research machines in the world, this will reshape everything you think you know about scientific discovery. Kit will also discuss his own path to becoming an author and science journalist, and give tips and advice for those who want to write their own scientific tales.

Friday, September 27, 2019 - 1:10pm

Joshua Kritzer


Joshua Kritzer


Department of Chemistry, Tufts University


(VanVeller)


The Kritzer Lab uses innovative molecules to block disease-associated proteins, often in ways

traditional "drug-like" molecules cannot. Several projects are exploring new ways to

synthesize and screen constrained peptides, which are molecules with unique abilities to bind

protein surfaces and block protein-protein interactions. Discovering new bioactive molecules

is only the first step. however. In several other projects, we are exploring new methods for

measuring cell penetration, which is the most difficult roadblock for many emerging

therapeutics including peptide therapeutics, protein therapeutics, RNA therapeutics, and gene

editing.

Wednesday, September 25, 2019 - 6:00pm to 7:00pm

Would you like to learn more about Phillips 66 and their Technology division?  Representatives from Phillips 66 are hosting a “Meet & Greet” for graduate students and post-docs on September 25, from 6:00 to 7:00pm in Hach Hall atrium.  Phillip 66 representatives will be available to answer any questions you may have about Phillips 66 and/or the application process.  Graduate students and post-docs looking for employment in 2019/2020 are encouraged to bring resumes for opportunities to meet with the recruiters on Thursday September 26, for pre-inte

Friday, September 20, 2019 - 3:10pm

Joaquín Rodríquez-López

University of Illinois at Urbana-Champaign

(Anand)

My group creates electroanalytical techniques and strategies to control materials and interfacial reactivity for applications in energy storage and conversion. In this seminar, I will discuss how new polymeric and low-dimensional materials, as well as an expanded electroanalytical toolbox for understanding interfaces and nanomaterials, are allowing us to discover new synergies at the nano- and mesoscale for emerging battery technologies. I will describe systems where nano-scale heterogeneity has an impact on macro-scale battery performance. A first case involves the use of novel redox active polymers (RAPs) for size-selective flow batteries. Our highly collaborative work in this field takes place within the Joint Center for Energy Storage Research, and is aimed at discovering new chemistries for energy storage beyond lithium-ion. Our investigations on RAPs span across several areas of knowledge, from the interrogation of individual polymer particles, to the elucidation of new redox polyelectrolyte dynamics, and to the evaluation of flow battery performance. A second case involves the creation of techniques to better understand intercalation on 2D nanomaterials and their complex interfacial behavior. My group has introduced scanning electrochemical microscopy (SECM) methods that uniquely probe electronic and ionic processes. Using these and other tools, we are starting to understand fundamental balances between electrons and ions that we hope will have an impact on diverse energy conversion and storage technologies.   

Friday, September 20, 2019 - 1:10pm

Aaron Sattler

Aaron Sattler

ExxonMobil Research & Engineering Company

(Sadow)

Friday, September 13, 2019 - 3:10pm

Francesca Massi

Biochemistry & Molecular Pharmacology, University of Massachusetts Medical School

(Venditti)

Abstract

Friday, September 13, 2019 - 1:10pm

Gabriel dos Passos Gomes

Departments of Chemistry & Computer Science, University of Toronto

(Winter)

Abstract

Thursday, September 12, 2019 - 4:10pm

Lisa Balbes, Certified Master Facilitator ACS Career Pathways Workshop Series

Balbes Consultants LLC, Kirkwood, Missouri

(Ames Local Section of the ACS, Burnett)

Tuesday, September 10, 2019 - 3:10pm

Lisa Balbes, Certified Master Facilitator ACS Career Pathways Workshop Series

Balbes Consultants LLC, Kirkwood, Missouri

(Ames Local Section of the ACS, Burnett)

Friday, September 6, 2019 - 3:10pm

Marina Guenza

Department of Chemistry & Biochemistry, University of Oregon

(Potoyan)

Friday, September 6, 2019 - 1:10pm

Angel Martí

Department of Chemistry, Rice University

(VanVeller)

Abstract:

Thursday, August 22, 2019 - 10:00am

Dilini Singappuli-Arachchige; Slowing Group Final Oral

Friday, August 16, 2019 - 9:00am to 6:00pm

Nano at Iowa State Logo

Nano @ IAState is a single day meeting to bring together ISU, Ames Lab and industrial scientists and researchers working on the synthesis and characterization of nanomaterials and applications of nanoscience.

Wednesday, August 7, 2019 - 12:00pm

William Everett Final Oral Windus Group

Friday, August 2, 2019 - 10:30am

Chamari Wijesooriya Smith Group Final Oral

Friday, July 19, 2019 - 3:00pm to Sunday, July 21, 2019 - 11:30am

Retreat LogoThe Midwest Retreat for Diversity in Chemistry (MWRDC) is modeled after the successful Puget Sound Women Chemists Retreat in 2015 and it is organized by a collaborative team of motivated graduate students and postdocs.


The event will be held July 19-21, 2019 at Luther College in Decorah, IA


Friday, July 19, 2019 - 2:00pm

Joani Mato Final Oral Exam, Gordon Group

Thursday, July 11, 2019 - 1:30pm

Brett Boote Final Oral; Smith Group

Thursday, June 13, 2019 - 1:00pm

Gordon Group - Buu Pham final oral exam

Monday, May 13, 2019 - 10:00am

William Everett

Windus Group

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