Academics

Teri Longin

Professor, Chemistry

Degrees: Ph.D., Chemistry, California Institute of Technology, 1995; B.S., Chemistry (honors, summa cum laude), Ithaca College, 1988

Office: Chemistry , Hedco Hall #211

Phone: 909/748-8543 Campus Ext. 8543

E-mail: teresa_longin@redlands.edu

Portrait

Areas of Expertise

I am a physical chemist with research interests in using liquid membranes to separate complex mixtures.

Research Highlights

My research focuses on transport in liquid membranes and modeling and developing new systems. In a liquid membrane, a carrier molecule facilitates the separation of a solute from a mixture by selectively transporting it to a receiving phase. In my research, I investigate carrier molecules whose binding properties can be modified with light, resulting in photofacilitated membranes. Transport in photofacilitated membranes can be turned on and off with light, which would be useful for selective delivery of drugs or for photosensors. More importantly, photofacilitated liquid membranes can concentrate solute in the sweep solution. If the solute is useful, it can be removed from a dilute solution and concentrated for easy recovery. Conversely, if the solute is toxic, the feed is purified, and the solute is concentrated in the sweep making disposal easier.

I’ve done theoretical work (with the great help of undergraduate research students) to learn what sort of carrier and membrane properties will produce the best photofacilitated liquid membranes. Our work indicates that solute transport with both sides of the membrane illuminated can be much higher than solute transport in the dark. This work appeared in one paper in the Journal of Physical Chemistry and another manuscript is currently in preparation; my undergraduate collaborators are co-authors on both. I am currently working on testing the results of my theoretical studies using a carrier and transport cell specially designed for photofacilitated transport studies.

Courses Offered at Redlands

  • General Chemistry
  • Physical Chemistry I
  • Physical Chemistry II
  • Spectroscopy Lab
  • Advanced Lab

Degrees Held

  • Ph.D., Chemistry March 17, 1995 California Institute of Technology
    Thesis: Measurements of Solvent Effects on Local Barrier Heights in Scanning Tunneling Microscopy
  • B.S., Chemistry (honors, summa cum laude) May 1988 Ithaca College, Ithaca, NY

Previous Teaching Experience

January 1998-May 1998
Lecturer for Introductory Chemistry
University of Colorado at Boulder

Professional Experience

May 2011-June 2012
Visiting Researcher with Prof. Barbara J. Finlayson-Pitts
University of California, Irvine

June 2000-August 2000
ACS-PRF Fellow with Prof. Carl Koval
University of Colorado at Boulder

January 1998-June 1998
Research Associate with Prof. Paul Todd
Department of Chemical Engineering
University of Colorado at Boulder

October 1995-Dec. 1997
Research Associate with Prof. Carl Koval
Department of Chemistry and Biochemistry
University of Colorado at Boulder

Awards and Honors

  • ACS-PRF type G grant: September 2000-August 2003
  • National Research Service Award Training Grant, 1993-1995
  • NSF Graduate Fellowship, 1988-1991

Publications

Lambert A. Doezema, Teresa Longin, William Cody, Veronique Perraud, Matthew Dawson, Michael J. Ezell, John Greaves, Kathleen R. Johnson, Barbara J. Finlayson-Pitts, "Analysis of secondary organic aerosols in air using extractive electrospray ionization mass spectrometry (EESI-MS)", RSC Advances, 2012, 2, 2930-2938.

T. L. Longin, J. Terhorst, C. Lang, “Simulations of Photopumping in Doubly Illuminated Liquid Membranes Containing Photoactive Carriers” J. Phys. Chem B, 2010, 114, 15846-15856.

T. L. Longin, T. Fraterman, P. Nguyen, “Simulations of Photomodulated Solute Transport in Doubly Illuminated Liquid Membranes Containing Photoactive Carriers” J. Phys. Chem. B, 2005, 109, 21063.

M. L. Goyette, T. L. Longin, R. D. Noble, C. A. Koval, “Selective Photofacilitated Transport of Sodium Ions Through Liquid Membranes: Key Factors in Experimental Design, Transport Results, and Comparison with a Mathematical Model” J. Membrane Sci., 2003, 212, 225.

T. L. Longin, C. A. Koval, R. D. Noble, “Photopumping in Liquid Membranes Containing Photoactive Carriers” J. Phys. Chem. B 1998, 102, 2064.

T. L. Longin, C. A. Koval, R. D. Noble, “Photomodulation of Transport Rates in Liquid Membranes Containing Photoactive Carriers” J. Phys. Chem. B 1998, 102, 1036.

T. L. Longin, C. A. Koval, R. D. Noble, “Photomodulation and Photopumping in Liquid Membranes Containing Carriers Optimized for Thermal Transport” J. Phys. Chem. B 1997, 101, 7172.

Presentations

T. L.  Longin, "Development of a guided-inquiry laboratory activity to introduce major concepts in chemical equilibrium for general chemistry", oral presentation at the 243rd National Meeting of the American Chemical Society, San Diego, CA, March, 2012.

T. L. Longin, Lambert Doezema, William Cody, Emily Bruns, Veronique Perraud, Michael Ezell, Matthew Dawson, John Greaves, Barbara J. Finlayson-Pitts, "Comparison of extractive electrospray ionization mass spectrometry to other techniques for studying the composition of secondary organic aersols", poster presentation at the 243rd National Meeting of the American Chemical Society, San Diego, CA, March, 2012. 

Teresa Longin, Lambert Doezema, William Cody, Veronique Perraud, Michael Ezell, Matthew Dawson, John Greaves, Barbara J. Finlayson-Pitts, "A New Approach to Speciation of the Organic Component of Atmospheric Aerosols", poster presentation at the American Geophysical Union Fall Meeting, San Francisco, December, 2011.

T. L. Longin, D. Van Engelen, C. Keedy, “Using EDTA titration of hard water and milk for student designed experiments in first year chemistry laboratories”.  Oral presentation at the American Chemical Society 238th National Meeting, Washington, D. C. August, 2009, Section: Chemical Education.

T.L. Longin, T. Fraterman, J. Terhorst, C. Lang, “Simulations of photofacilitated active transport in doubly illuminated photoactive liquid membranes”. Oral presentation by T. Longin, co-authors are undergraduate collaborators.  American Chemical Society 229th National Meeting, San Diego, CA, March 2005. Section: Computers in Chemistry.

John Terhorst, Teresa L. Longin, and Christopher Lang, “Simulations of photopumping in doubly illuminated liquid membranes containing photoactive carriers.” Poster presentation by John Terhorst at the 38th ACS Western Regional Meeting, Long Beach, October, 2003.

T. L. Longin, J. I. Selco, American Chemical Society 221th National Meeting, San Diego, CA. Section: Chemical Education, Oral Presentation, April, 2001 “How can physical chemistry possibly satisfy a writing requirement?”

T. L. Longin, “Theoretical and Experimental Investigations of Photofacilitated Transport in Liquid Membranes”, oral presentation at the American Chemical Society 217th National Meeting, Anaheim, CA, March 1999. Section: Computers in Chemistry.

T. L. Longin, C. A. Koval, R. D. Noble, “Photomodulation of Transport Rates in Liquid Membranes Containing Photoactive Carriers”.  Oral presentation at the American Chemical Society 214th National Meeting, Las Vegas, NV, September 1997. Section: Polymeric Materials: Science and Engineering.

Professional Affiliations

  • American Chemical Society
  • Council on Undergraduate Research

Do you know the Och Tamale?
bulldog athletics logo

The non-sensical Och Tamale chant was originally titled the "Psalm of Collegiate Thanksgiving."

More »