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Formation of Droplets Doping of Droplets Excitation of solvated species Bolometer or mass spectrometer detection UGA HENDI Apparatus
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Stark Spectroscopy of CHStark Spectroscopy of CH33F F Solvated in Helium NanodropletsSolvated in Helium Nanodroplets
Alexander M. MorrisonSteven Flynn
Tao LiangGary E. Douberly
Department of Chemistry, University of Georgia
http://douberly.myweb.uga.edu
Supported by: UGA Office of the Vice President for Research University of Georgia Research Foundation
Coupling Rotational Relaxation to He excitationsCoupling Rotational Relaxation to He excitations
Rotational Energy (cm-1)
Den
sity
of S
tate
s
|1,1
|1,1
q Q1(
1)ns = E
|J,K
ener
gy
M
+1
+1
-1
-10
0
~6 cm-1
•Formation of Droplets
•Doping of Droplets
•Excitation of solvated species
•Bolometer or mass spectrometer detection
UGA HENDI ApparatusUGA HENDI Apparatus
Wavemeter output <10MHz resolution
Lockheed Martin Aculight Argos Lockheed Martin Aculight Argos Model 2400 PPLN cw OPOModel 2400 PPLN cw OPO
2550-4000 cm-1
~ 1 Watt (idler)
13CH3F
ν1/2ν5
ν1/2ν5
ν4
CH3F-N2
Upper Diad (1/25) = 0.14 cm-1
Lower Diad (1/25) = 0.06 cm-1
0
5
10
15
20
2860
2870
2880
Ene
rgy
(cm
-1)
ns = Ens = A1
|J,K
|0,0|1,1
|2,2
|0,0
|1,1
|2,2
Parallel band: K = 0
q R0(
0)
q R0(
1)
q R1(
1)
q Q1(
1)
q P0(
1)gns=16 gns=16
0
5
10
15
20
2860
2870
2880
Ene
rgy
(cm
-1)
ns = Ens = A1
|J,K
|0,0|1,1
|2,2
|0,0
|1,1
|2,2
Parallel band: K = 0Parallel band: K = 0
q R0(
0)
q R0(
1)
q R1(
1)
q Q1(
1)
q P0(
1)
q R0(
0)
q R0(
1)
q R1(
1)
q Q1(
1)
q P0(
1)gns=16 gns=16
Lower Diad (Lower Diad (11/2/255))KJK”(J’’)
v' = A1
HeliumB=0.388 cm-1
D''=0D'=0.0054 cm-1
0=2859.373 cm-1
Gas Phase *B''=0.852 cm-1
0=2863 cm-1
* J. Champion, A. Robiette, I. Mills, G. Graner, J. Mol. Spec. 96, 422, (1982).
KJK”(J’’)
Lower Diad (Lower Diad (11/2/255))
Elaser
EStark
Elaser
EStark
or
M = 0 M = ±1
Parallel PolarizationM = 0
Elaser
EStark
Lower Diad (Lower Diad (11/2/255))
Perpendicular Polarization M = ±1
Elaser
EStark
qQ1(1)
+1
0
-1
+1
0
-1
|1,1
|1,1
E (kv/cm)
Elaser
EStark
Elaser
EStark
" = 1.90 D' = 1.92 D
" = 1.90 D' = 1.92 D
νν44 asymmetric stretchasymmetric stretch
0
5
10
15
20
2860
2870
2880
Ene
rgy
(cm
-1)
ns = Ens = A1
|J,K
|0,0|1,1
|2,2
|0,0
|1,1
|2,2
v' = E
Perpendicular band: K = ±1
r R0(
1)
r Q0(
1) p P1(
1)
r R0(
0) p Q1(
1)p R
1(1)
r R1(
1)
0
5
10
15
20
2860
2870
2880
Ene
rgy
(cm
-1)
ns = Ens = A1
|J,K
|0,0|1,1
|2,2
|0,0
|1,1
|2,2
v' = E
Perpendicular band: K = ±1Perpendicular band: K = ±1
r R0(
1)
r Q0(
1) p P1(
1)
r R0(
0) p Q1(
1)p R
1(1)
r R1(
1)
r R0(
1)
r Q0(
1) p P1(
1)
r R0(
0) p Q1(
1)p R
1(1)
r R1(
1)
HeliumB=0.388 cm-1
A=4.31 cm-1
0=2996.50 cm-1
Gas Phase *B''=0.852 cm-1
A''=5.18 cm-1
0=2998.438 cm-1
* J. Champion, A. Robiette, I. Mills, G. Graner, J. Mol. Spec. 96, 422, (1982).
KJK”(J’’)
νν44 asymmetric stretchasymmetric stretch
Perpendicular Polarization M = ±1
Elaser
EStark
qQ1(1)
+1
0
-1
+1
0
-1
|1,1
|1,1
E (kv/cm)
Thanks!Thanks!
Gary Douberly
Fellow Lab MatesSteven FlynnTao Liang
SupportUniversity of Georgia Research FoundationUGA Office of the Vice President for Research
