Experiment: Browne Lab_20201124_Hexamethylcyclotrisiloxane/Chlorine/Acetonitrile_Chlorine radical_No Seed


Name: Browne Lab_20201124_Hexamethylcyclotrisiloxane/Chlorine/Acetonitrile_Chlorine radical_No Seed
Date: 2020-11-24

Browne Lab

Browne Lab Main Chamber

Experiment Set
D3 Experiments

Oxidize D3 using Cl2 as the oxidant precursor to promote RO2 radical isomerizaion/autooxidation reactions.

The difunctional product, the formate ester + siloxanol was the largest product detected.

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: 1e6 (molecules_per_cubic_centimeter)
RO2 Main Fate: Autoxidation/Isomerization
RO2 Lifetime: 27 (Seconds)
Pressure: 860

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

Experiment Set Details

Name: D3 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 D3 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
Hexamethylcyclotrisiloxane (10914) 80 Parts Per Billion
Chlorine (24526) 15 Parts Per Billion
Acetonitrile (6342)
  • Nitrile
1 Parts Per Million

D3Cl2_20201124_Logs.csv Timeline

Acquisition started (ID# 0) 3689084608
chamber background. 3689084631
about to add Cl2. 3689084685
done adding Cl2 3689085036
adding D3 3689085283
done adding D3 3689085419
one pair of lights on 3689085797
End of acquisition 3689088206
Acquisition started (ID# 1) 3689088612
End of acquisition 3689092210
Acquisition started (ID# 2) 3689092214
lights off 3689093910
Acquisition aborted after 343 complete writes. 1 additional bufs in the incomplete last write. 3689095643

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: