Fall 2000 Chemistry Seminar Program

Angela DeGreeff

Chris Krug

Student Research Presentations and Posters

Ni-Mediated Reductive Dechlorination of Trichloroethylene

Detection of 2-amino-1-methyl-6-phenylimidazo[4,5,6]pyridine (PhIP) in Wine by Solid Matrix Luminescence

Synthesis and Characterization of Quaternary Rare-earth Polychalcophosphate Compounds

Kinetics and Mechanisms of Ligand Exchange around Re(V) Catalysts

You're right, you don't need 90% of what is in the P-chem curriculum, but....

Students often wonder why so much irrelevant material is foisted upon them in their undergraduate courses. P-Chem and calculus often bear the brunt of such criticisms by chemistry majors, but no doubt undergraduates in all majors express similar frustrations and douts. During my seminar, I'll use projects at Dakota Technologies, a high technology business I co-founded in 1993, to show that you can never be quite sure what information you'll need to solve "real-world" problems or when you'll need it. I'll also take advantage of the opportunity to describe a few of my ideas for re-structuring the undergraduate curriculum.

Followed by Fall Chemistry Picnic

North Dakota State & Dakota Technologies

Gas-sensing Heme Proteins: Allosteric Regulation Through Coordination Sphere Reorganization

University of Wisconsin, Madison

Research Presentations

Geochemical research at the Large Lakes Observatory: Understanding the history of global climate

University of Minnesota, Duluth

2D Mass Spectroscopy: Mining for Mechanisms of Chemical Bond Fragmentation

My undergraduate research group at Carleton is interested in dissecting the bond breakage half of chemistry when a small gaseous molecule absorbs very high-energy light (X-rays). Simple ideas suggest all bonds would be obliterated at once. In reality, there are a number of concerted and sequential mechanisms that involve early or late ejection of neutral pieces and separation of charged fragments complexity abounds! I will discuss a fancy and intriguing kind of 2D time-of-flight mass spectroscopy that allows us to simultaneously detect 1 electron and 2 positive ion pieces produced from the fragmentation of a single molecule. I will focus on results from C4F8 and piece together a detailed "billiard ball" picture of how molecules fall apart following photo-excitation. Photofragmentation studies can help establish basic mechanistic principles and patterns relevant to more applied systems like the earth¹s atmosphere.

* All seminars begin at 3:00 PM on Fridays in Nobel 201 with refreshments beginning at 2:30 PM in the Nobel Hall lobby

Additional Seminars and Talks

Date	Speaker	Title	Affiliation	Talk Location and Time
Various	Various	Biochemistry and Molecular Biology Seminar Series	.	Nobel 201, 8 AM
		Sigma Xi Lecture		Spring: TBA
October 3 and 4	Nobel Conference	Globalization 2000: Economic Prospects and Challenges	.
November 2	Ron Christensen	The Long and Short of Polyenes: The Photochemistry of Linearly Conjugated Systems	Bowdoin College	Nobel 305, 1:30 PM

Date	Speaker	Title	Affiliation
September 15	Angela DeGreeff Chris Krug	Student Research Presentations and Posters Ni-Mediated Reductive Dechlorination of Trichloroethylene Detection of 2-amino-1-methyl-6-phenylimidazo[4,5,6]pyridine (PhIP) in Wine by Solid Matrix Luminescence	Gustavus
September 22	Carl Evenson	Synthesis and Characterization of Quaternary Rare-earth Polychalcophosphate Compounds	Colorado State
September 29	David Lahti	Kinetics and Mechanisms of Ligand Exchange around Re(V) Catalysts	Iowa State
October 13	Greg Gillespie	You're right, you don't need 90% of what is in the P-chem curriculum, but.... Students often wonder why so much irrelevant material is foisted upon them in their undergraduate courses. P-Chem and calculus often bear the brunt of such criticisms by chemistry majors, but no doubt undergraduates in all majors express similar frustrations and douts. During my seminar, I'll use projects at Dakota Technologies, a high technology business I co-founded in 1993, to show that you can never be quite sure what information you'll need to solve "real-world" problems or when you'll need it. I'll also take advantage of the opportunity to describe a few of my ideas for re-structuring the undergraduate curriculum. Followed by Fall Chemistry Picnic	North Dakota State & Dakota Technologies
October 27	Judith Burstyn	Gas-sensing Heme Proteins: Allosteric Regulation Through Coordination Sphere Reorganization	University of Wisconsin, Madison
November 3	Gretchen Hofmeister Brian O'Brien	Research Presentations	Gustavus
November 10	Jim McManus	Geochemical research at the Large Lakes Observatory: Understanding the history of global climate	University of Minnesota, Duluth
November 17	Trish Ferrett	2D Mass Spectroscopy: Mining for Mechanisms of Chemical Bond Fragmentation My undergraduate research group at Carleton is interested in dissecting the bond breakage half of chemistry when a small gaseous molecule absorbs very high-energy light (X-rays). Simple ideas suggest all bonds would be obliterated at once. In reality, there are a number of concerted and sequential mechanisms that involve early or late ejection of neutral pieces and separation of charged fragments complexity abounds! I will discuss a fancy and intriguing kind of 2D time-of-flight mass spectroscopy that allows us to simultaneously detect 1 electron and 2 positive ion pieces produced from the fragmentation of a single molecule. I will focus on results from C4F8 and piece together a detailed "billiard ball" picture of how molecules fall apart following photo-excitation. Photofragmentation studies can help establish basic mechanistic principles and patterns relevant to more applied systems like the earth¹s atmosphere.	Carleton College
December 1	TBA	TBA	.