Project Grant 2404431

Award Date 9/1/24
Completion Date 8/31/27
Dollars Obligated $650K
Federal Grant Program
47.049
Assistance Type
Project Grant
Place of Performance
College Station, TX 77843, USA
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This $649,993 federal Project Grant award from the National Science Foundation (NSF)'s Mathematical and Physical Sciences program (CFDA 47.049) supports a research project at Texas A&M University to characterize the molecular composition and behavior of charge-transfer chromophores in atmospheric brown carbon (BRC). The key products and services to be delivered under this 3-year award, which began on September 1, 2024, include:

  1. Using chamber reactions to produce BRC samples from primary and secondary sources, and characterizing the aerosol chemical composition in real-time using advanced mass spectrometry techniques.

  2. Further characterizing filter-extracted BRC samples using high-resolution mass spectrometry coupled with absorbance detection to identify key chromophores, and studying the impact of pH, redox status, and molecular size on optical properties.

  3. Investigating the photostability of filter-extracted BRC and its propensity to generate singlet oxygen, to better understand atmospheric aging processes.

This research aims to improve the mechanistic understanding of chromophores, which are key species altering light absorption in many environmental systems, as well as the direct climate effects of aerosols. The project also includes targeted mentorship of underrepresented groups as next-generation STEM researchers, and plans to share knowledge gained through outreach programs.

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