electronic spectroscopy of mass-selected c 7 h 3 + and c 7 h 3 isomers in 6 k neon matrices
DESCRIPTION
Freivogel, Fulara, Lessen, Forney, Maier, Chem. Phys. 1994, 189: 335; Fulara, Nagy, Garkusha, Maier, J. Chem. Phys. 2010, 133: −5 mbar 10 −8 mbar ION SOURCE DEFLECTOR MASS FILTER MATRIX ELECTROSTATIC LENSES NeTRANSCRIPT
Electronic Spectroscopy of Mass-Selected C7H3+
and C7H3 Isomers in 6 K Neon Matrices
Freivogel, Fulara, Lessen, Forney, Maier, Chem. Phys. 1994, 189: 335;Fulara, Nagy, Garkusha, Maier, J. Chem. Phys. 2010, 133: 024304
10−5 mbar
10−8 mbar
ION SOURCE
DEFLECTOR
MASS FILTER MATRIX
ELE
CTR
OS
TATI
CLE
NS
ES
Ne
GRATING TURRET
FIBER BUNDLE
DIFFUSER
LIGHT SOURCE
SPECTROGRAPH
CUT-OFF FILTERS
MANUAL SHUTTER
MATRIX
250‒1100 nmresolution ~0.1 nm
Fulara, Nagy, Garkusha, Maier, J. Chem. Phys. 2010, 133: 024304
150 μm
Nneon/Nion 10≅ 6−108
(1013−1016 ions/cm3)
• Neutralization electron scavenger (CH3Cl + e− CH3 + Cl−)
• UV irradiation (mpHg lamp 5.4 eV) cations/ neutrals
• Laser induced fluorescence selective excitation of single species
Matrix, 6 K
450 500 550 600 650 700
Wavelength [nm]
Abs
orba
nce
0.0
0.2
0.4
0.6
0.8
440 4500.00
0.05
0.10
H-Cor
H-Cor+
H-Cor+
H-Cor+
deposition
irradiation
H
C7H3+
C7H3.
540 520 500 480 460 nm
0.00
0.05
0.10
0.15
HC7H+
HC7H+
Abs
orba
nce
90 eV
uv + h
50 eV
C7H3+
A+ (0,0)A (86,160)A- (210)
B+ (15,61)B (0,52)B- (35)
C+ (46,69)C (28,29)C- (0)
F+ (14,25)F (104,134)F- (235)
E+ (381,452)E (34,281)E- (124)
J+ (73,40)J (-,0)
450 435 420 405 nm
0.0
0.1
0.2
0.3
0.4
0001A1 X 1A1
0001A' X 1A'
Abs
orba
nce
C7H3+
+
+
525 510 495 480 465 nm
0.00
0.02
0.04
0.06
Abs
orba
nce
0002A' X 2A'
2B1 X 2B1
000
000
2A' X 2A'
C2+
C7H3.
324 318 312 306 300 294 nm
0.00
0.05
0.10
0.15
0.20000
1A1 X 1A1
2B1 X 2A2
A+A.
Abs
orba
nce
C7H3+
+
Dr. Jan FULARA
Iryna GARKUSHA PhD
Adam NAGY PhD
Arghya CHAKRABORTY
Karol FILIPKOWSKI