Data Files Accompanying: Sodium Drives Equilibria for Semi-Soluble Phosphoric and Phosphonic Acids of Model Sea Spray Aerosol Surfaces
Authors: Jennifer F. Neal, Mickey M. Rogers, Morgan A. Smeltzer, Kimberly A. Carter-Fenk, Alexander J. Grooms, Mia M. Zerkle, and Heather C. Allen
Journal: Submitted to ACS Earth and Space Chemistry

Contact: 
Heather C. Allen, allen@chemistry.ohio-state.edu, Department of Chemistry & Biochemistry, The Ohio State University

Cite as:
Neal, Jennifer F.; Rogers, Mickey M.; Smeltzer, Morgan A.; Carter-Fenk, Kimberly A.; Grooms, Alexander J.; Zerkle, Mia M.; Allen, Heather C. (2020). Data from: Sodium Drives Interfacial Equilibria for Semi-Soluble Phosphoric and Phosphonic Acids of Model Sea Spray Aerosol Surfaces. In Center for Aerosol Impacts on Chemistry of the Environment (CAICE). UC San Diego Library Digital Collections. https://doi.org/10.6075/J0KK995Z

Abbreviations:
BAM: Brewster angle microscopy
Isotherm: Surface pressure-area isotherm
IRRAS: Infrared reflection absorption spectroscopy
1-palmitoyl-2-hydroxy-sn-glycero-3-phosphate sodium salt: C16LPA
1,2-didecanoyl-sn-glycero-3-phosphate sodium salt: C10PA
1,2-dioctanoyl-sn-glycero-3-phosphate sodium salt: C8PA
1-stearoyl-2-hydroxy-sn-glycero-3-phosphate sodium salt: C18LPA
hexadecylphosphonic acid: C16PO3H2
octadecylphosphonic acid: C18PO3H2


Files:


Folders:
jfn_20200214_BAMImages: Cropped and scaled Brewster angle microscopy images
jfn_20200214_IRRAS: Infrared reflection absorption spectroscopy data
jfn_2020014_Isotherms: Surface pressure-area isotherm data



Experimental Methods for Data Collection:
Materials
1-palmitoyl-2-hydroxy-sn-glycero-3-phosphate sodium salt (>99%, Avanti Polar Lipids), 1,2-didecanoyl-sn-glycero-3-phosphate sodium salt (>99%, Avanti Polar Lipids), 1,2-dioctanoyl-sn-glycero-3-phosphate sodium salt (>99%, Avanti Polar Lipids), and 1-stearoyl-2-hydroxy-sn-glycero-3-phosphate sodium salt (>99%, Avanti Polar Lipids) were dissolved in a 65:35:8 chloroform/methanol/water (v/v/v) (HPLC grade, Fisher Scientific). Stock solutions of hexadecylphosphonic acid (97%, Sigma Aldrich) and octadecylphosphonic acid (97%, Sigma Aldrich) were dissolved in a mixture of 4:1 chloroform/methanol (v/v) and/or pure chloroform (HPLC grade, Fisher Scientific). Sodium chloride (ACS certified, Fisher) was baked at 650°C for 10 hours prior to use. The pH adjusted solutions were made with hydrochloric acid (trace metal grade, Fisher Scientific). All solutions were prepared in ultrapure water with a resistivity of 18.2 MΩ·cm (Milli-Q Advantage A10).

Surface Pressure-Area Isotherms
	Teflon Langmuir trough; Biolin Scientific Paramus, NJ
	Delrin barriers
	Wilhelmy plate method: using precut filter paper plates (Ashless grade, Whatman)
	Each isotherm was averaegd in Origin 9.0.0
	Error shown is 1 standard deviation from the mean and was calculated in Origin 9.0.0
Brewster Angle Microscopy
	Laser: 1.5 mW He-Ne, 543 nm
	Glan-laser calcite polarizer, Thorlabs, Newton, NJ
	Objective lens: 10X infinity-corrected SLWD CFI60 TU Plan EPI, Nikon Instruments, Melville, NY
	Tube lens, focal length 200 mm, MXA22018, Nikon Instruments
	Camera: back-illuminated EM-CCD, iXon DV887-BV, Andor Technology USA, Concord, MA, 512 x 512 active pixels
	Images were processed in ImageJ 
	Images cropped to show the highest resolution region.
Infrared Reflection Absorption Spectroscopy
	FTIR spectrometer (Frontier, Perkin Elmer, United States) with liquid nitrogen cooled HgCdTe (MCT) detector
	Each IRRAS spectrum was averaegd in Origin 9.0.0
	Error shown is 1 standard deviation from the mean and was calculated in Origin 9.0.0