The 2025 Pauling Medal was awarded to Professor Joseph S. Francisco, President’s Distinguished Professor of Chemistry, University of Pennsylvania.

2025 Pauling Medal Winner
Historical information about the 2025 Pauling Medal Award Symposium and Banquet
The 2025 Pauling Medal was presented to Professor Joseph S. Francisco at the 2025 Pauling Medal Symposium on October 18, 2025, at Seattle University in Seattle, WA, in recognition of his pioneering studies of the chemistry of Earth’s atmosphere. Professor Francisco’s groundbreaking research reshaped our fundamental understanding of atmospheric processes, including pioneering air-water/microdroplet chemistry.
The symposium included lectures by eminent scientists and the awardee (titles below), a student poster session including 25 posters from around the Pacific Northwest, a reception, and an evening banquet with presentation of the Pauling Medal to Professor Francisco. Download a press release here. All events were free and open to the public except for the evening banquet, which was a ticketed event.
The afternoon symposium was a free, public event that did not require registration.
2025 Schedule and Locations:
10:00-11:30 Poster Session – Sinegal Center for Science and Innovation
1:00-5:30 Pauling Symposium Lectures (titles below) – Pigott Auditorium
5:30-6:00 Reception and Poster Awards – Pigott Atrium
6:00-6:30 Banquet Venue Opens (advance registration required) – Leroux Room, Student Center
6:30-7:00 Dinner Served – Leroux Room, Student Center
7:00 Medal Presentation and Awardee Lecture – Leroux Room
From Acid Rain to Clear Skies: My Journey to Seattle
A Seattle University Campus Map is here. Download a flyer here.
Symposium Speakers

Introduction of the Awardee
Peter Stang
University of Utah

Organometallic Complexes and Molecular Oxygen: Developing Mechanistic Understanding for Sustainable Oxidation Catalysis
Karen Goldberg
University of Pennsylvania

Adventures at Interfaces with Molecules, Water and Sunlight
Veronica Vaida
University of Colorado

Why Swamp Gas Bubbles Burst into Flame
Richard Zare
Stanford University

Water in the Atmosphere: The Molecule that Changes Everything
Joseph S. Francisco
2025 Pauling Medalist
University of Pennsylvania
Here are some links with information about Professor Francisco.
University of Pennsylvania Department of Chemistry
University of Pennsylvania Department of Earth and Environmental Science
American Academy of Arts and Sciences
The 2025 Pauling Medal Symposium was organized by Seattle University Many thanksto our Seattle University colleagues for hosting the 2025 symposium.
