Experiment: Browne Lab_20210325_Chlorine/Decamethylcyclopentasiloxane/Acetonitrile_Chlorine radical_No Seed


Name: Browne Lab_20210325_Chlorine/Decamethylcyclopentasiloxane/Acetonitrile_Chlorine radical_No Seed
Date: 2021-03-25

Browne Lab

Browne Lab Main Chamber

Experiment Set
D5 Experiments

Oxidized D5 using Cl2 as the radical precursor to encourage RO2 isomerization/isomerization reactions.

We generally saw the same products as when other oxidants were used, even with very different RO2 lifetimes.

Additional Notes
NOx was not measured on the same day as the CIMS data was taken. NOx data is from a repeat experiments without any CIMS measurements.

Experiment Details


  • Gas phase chemical reaction
Temperature: 25
Relative Humidity: 0-5
Seeded Experiment: No
Fuchs Adjusted Surface Area:
Condensation sink rate coefficient: 0-5
Reaction type:
Oxidant Name: Chlorine radical
Initial Oxidant Concentration Value: 4e5 (molecules_per_cubic_centimeter)
RO2 Main Fate: Autoxidation/Isomerization
RO2 Lifetime: 46 (Seconds)
Pressure: 860 mbar

Data Set plots
Choose a file: Choose the X-Axis:

Experiment Set Details

Name: D5 Experiments
Time format and units: CIMS time is in number of seconds since Jan 1st, 1904 in UTC. NOx data is in M/D/Y Hr:Min:Sec format in local time.
CIMS and NOx data (if available) for measurements of D5 oxidation with conditions favoring different peroxy radical fates. Three radical precursors were used: HONO, H2O2, and Cl2.


  • Mitchell Alton University of Colorado at Boulder
  • Eleanor Browne University of Colorado at Boulder


Principal investigator:

Eleanor Browne
Phone: 303-735-7685
E-mail: eleanor.browne@colorado.edu
OrcID: 0000-0002-8076-9455

Data Manager:

Mitchell Alton
E-mail: mitchell.alton@colorado.edu


Reactant Compound type Concentration Concentration units
Chlorine (24526) 15 Parts Per Billion
Decamethylcyclopentasiloxane (10913) 80 Parts Per Billion
Acetonitrile (6342)
  • Nitrile
1 Parts Per Million

D5Cl2_20210325_Logs.csv Timeline

tw_wv_logText tw_wv_logTime
Acquisition started (ID# 0) 3699529916
chamber background 3699529925
about to add 20uL ACN 3699530037
adding Cl2 3699530178
about to add 1uL D5 3699530266
850sccm dry 700sccm wet
letting everything mix 3699530592
background 3699530625
done adding Cl2 3699530932
back to sampling chamber w. 850+700sccm dilution 3699530975
no diluition into chamber 3699531146
8 bulbs on 3699532091
End of acquisition 3699533523
Acquisition started (ID# 1) 3699533523
End of acquisition 3699537130
Acquisition started (ID# 2) 3699537131
lights off 3699540462
End of acquisition 3699540738
Acquisition started (ID# 3) 3699540738
Acquisition aborted after 259 complete writes. 8 additional bufs in the incomplete last write. 3699543342

Light Flux Characterizations:
Particle Loss Characterizations:
Vapor Loss Characterizations:

Chamber Details

Name: Browne Lab Main Chamber
Volume in cubic meters: 1
Surface area in cubic meters: 8
Flow Mode: Batch
Flow through rate in liters per minute:
Body Material: Teflon
Body thickness: 2
Replacement date: 2017-10-01
Replacement frequency: As needed
Cleaning method: Flushing with air Flushing with air with UV lights on Oxidation
o3 background:
nox background:
Particle background in micrograms per cubic meter:
Air filtration method: Uses Aadco clean air
Mixing method: 0
Mixing method material:
Temparature Control: No
Temparature measurements recorded: No
Temparature range (min degrees celcius):
Temparature range (max degrees celcius):
Humidity Control: Yes
Humidity Measurements Recorded: Yes
Relative humidity range (min percent): 0
Relative humidity range (max percent): 80
Particle experiment capability: 1
Lights: Yes
Light source type(s): Up to 10 fluorescent bulbs centered at 370nm, Up to 4 fluorescent bulbs centered at 254nm
Supplemental information:
Additional Notes: