Polypropylene Stereochemistry and Identification by 13C NMR Spectroscopy

Submitted by Shirley Lin / United States Naval Academy on Mon, 07/16/2012 - 11:55
Description

These 6 slides introduce the nomenclature used to describe the stereochemistry of various polypropylenes (PPs) that can be synthesized by metallocene-catalyzed polymerizations. Although PP is the specific polymer discussed, the nomenclature applies to other alpha-olefin polymerizations.

VIPEr Screencast

Submitted by Chip Nataro / Lafayette College on Wed, 05/09/2012 - 10:27
Description

This screencast is a brief introduction to some of the features of VIPEr.

Hard-Soft Acid-Base Theory in Action: A New Ion-Exchange Material for Sequestering Heavy Metals

Submitted by Maggie Geselbracht / Reed College on Sun, 06/26/2011 - 00:30
Description

This paper from Chemistry: A European Journal by Manolis Manos and Mercouri Kanatzidis (link provided below in Web Resources) describes the ion-exchange chemistry of a layered sulfide (KMS-1) that exhibits an enhanced preference for soft metal cations (Cd2+, Pb2+, and Hg2+) replacing K+ in between the metal sulfide layers of KMS-1.  Not only does this paper provide a practical application of hard-soft acid-base theory (HSAB), but it provides an accessible introduction to the technical literature for undergraduates, par

Demonstration on tempering of iron

Submitted by Lee Park / Williams College on Sat, 06/25/2011 - 15:01
Description

This is a simple and quick demonstration of the process oftempering of a solid, and the dramatic

Understanding phase diagrams of solid state alloys: Application to archeological studies

Submitted by Lee Park / Williams College on Sat, 06/25/2011 - 13:43
Description
This paper from the Journal of Archeological Science describes the analysis of silver-copper artifacts found in Machu Picchu.  The archeological samples were compared to various control samples prepared from different compositions and under varying processing (thermal treatment) conditions.  Using analytical methods (mechanical hardness testing, micrographic analysis of microstructure and morphology, elemental analysis), researchers were able to offer hypotheses concerning the source materials and fabrication methods used by Inca artisans.

Synthesis of Zinc Oxide Nanoparticles and Characterization by Powder X-ray Diffraction

Submitted by Catherine Oertel / Oberlin College on Sat, 06/25/2011 - 13:16
Description

I designed this lab experiment to introduce students to the uses of powder X-ray diffraction in the context of the synthesis of a technologically relevant material. Zinc oxide nanoparticles can be synthesized readily with reagents that are inexpensive and relatively benign with regard to student use and waste disposal. Two experiments described in J. Chem.

Catalysis using functionalized mesoporous silica

Submitted by Randall Hicks / Wheaton College on Wed, 05/25/2011 - 10:30
Description

This paper, while not fundamentally groundbreaking, serves as a nice introduction to the field of mesoporous materials. I like that it covers synthesis, characterization, and an application of the materials. I have used this paper in our senior seminar course as the basis for discussion of this area of chemistry. Discussion questions cover aspects of sol-gel chemistry, powder diffraction, gas adsorption, IR, solid state NMR, UV-Vis, and catalysis.  

Pigment Syntheses and Qualitative Analysis

Submitted by Rebecca M. Jones / George Mason University on Wed, 03/09/2011 - 15:13
Description

This set of experiments provides an introduction to simple inorganic synthesis and qualitative analysis of inorganic pigments.  I have taught this series of experiments in my first semester junior level inorganic class for the past 5 years.  In part 1, students synthesize five inorganic pigments.  Part 2 involves identifying an unknown inorganic white pigment by chemical and physical tests.  These

Synthesis and characterization of 12-tungstosilicic acid - a modification

Submitted by Randall Hicks / Wheaton College on Mon, 11/15/2010 - 23:25
Description
This lab experiment is an update on the synthesis of the title acid. An account of this synthesis can be found in William Jolly's book, The Synthesis and Characterization of Inorganic Compounds. The synthetic procedure is reliable and was retained. However, I modified some content and added components to extend to a two-week experiment. This lab now covers the synthesis, an acid-base titration with error analysis, and the use of TGA to complement the titration results.

Inorganic Chemistry of Organ Pipes: Composition and Corrosion

Submitted by Catherine Oertel / Oberlin College on Thu, 09/30/2010 - 14:46
Description

This presentation provides an inorganic chemist's perspective on metals used to make organ pipes and their corrosion and conservation.  The slides highlight my own research in this area as well as work being done by other scientists around the world.  The purpose of this learning object is to show students an application of inorganic chemistry that they probably have not encountered before and show an example of how analytical methods of materials chemistry can be used in conservation science.