MALDI-TOF:

MALDI-TOF:

E n = 1 n = 2 n = 3 : n = 4 l = 0/sl = 1/pl = 2/dl = 3/f :::: :::: ::::. A > H. t.d. C (6e - )

n = 1 n = 2 n = 3 :::: E n = 1 n = 2 n = 3 :::: E A A - B A(n=1) + B A(n=2) + B A(n=3) + B A(n=1) A(n=2) A(n=3) r AB

1xh 2 E AB AB + + e AB**

REMPI = Resonance Enhanced MultiPhoton Ionization 1xh 2xh 2 E AB AB + + e AB** (2 + 1) REMPI

REMPI = Resonance Enhanced MultiPhoton Ionization 1xh 2xh 2 E AB AB + + e AB** A + B + + e

REMPI = Resonance Enhanced MultiPhoton Ionization 1xh 2xh 3xh AB AB + + e AB** 2 nxh E

out Voltage devider HV - 2Kv HX nozzle Turbo Pump TOF lense MCP detector oscilloscope computer Excimer Laser In út Dye- Laser SHG Time delay  S laser control Pellin Broca prism SHG control In REMPI- TOF

H+H+ CH + CH 2 + C+C+ C2+C2+ C2H+C2H+ C2H2+C2H2+ Magn jóna Ion yield LASER radiation of C 2 H 2 Mw Time of flight

Orka HCCH: HCCH*:

Orka C2C2 H2H2 HCCH*: C2C2 + +

Orka HCCH*:

Orka HCCH*: CH 2 C

H+H+ CH + CH 2 + C+C+ C2+C2+ C2H+C2H+ C2H2+C2H2+ Magn jóna Ion yield LASER radiation of C 2 H 2 Mw Time of flight

C2H2C2H2 Big Organic molecules : Life(?) Interstellar space ???

C2H2C2H2 Big Organic molecules : Life(?) Interstellar space ??? C2C2 C CH 2

REMPI = Resonance Enhanced MultiPhoton Ionization Resonance excitation to high energy states of neutral species, followed by photon ionization; For example: 1xh 2xh 3xh AB AB + + e AB** 2 nxh E

Intensity Mw H+H+ 35 Cl + H 35 Cl + H 37 Cl + 12 C + Two photon resonance excitation= cm -1 Mass spectrum RCl = HCl

Mw / rel. Two photon excitation / cm -1 Ion yield REMPI- spectrum H+H+ 35 Cl + H 35 Cl + H 37 Cl + cm -1

Mw / rel. 35 Cl + H 35 Cl + H 37 Cl + 2xhv Mw 35 Cl + 37 Cl + H 37 Cl + H 35 Cl + /cm -1

2xhv Mw /amu 35 Cl + 37 Cl + H 37 Cl + H 35 Cl + H+H+ /cm -1

2xhv/ cm -1 Mw/amu 35 Cl + 37 Cl + H 37 Cl + H 35 Cl + H+H+

REMPI = Resonance Enhanced MultiPhoton Ionization 1xh 2xh 2 E AB AB + + e AB** A + B + + e

REMPI = Resonance Enhanced MultiPhoton Ionization 1xh 2xh 2 E AB AB + + e AB** A + B + + e AB # # AB + + e A + + B + e A + B + + e

A + B/B* REMPI = Resonance Enhanced MultiPhoton Ionization 1xh 2xh 2 E AB AB + + e AB** A + B + + e AB # # AB + + e A + + B + e A + B + + e A + + e B + + e

MCP detector Based on

= MCP (Micro Channel Plates = Charge-Couple Device camera Based on

= MCP (Micro Channel Plates = Charge-Couple Device camera

r(I-Br) I + Br I + Br* tt I + +e + Br* I + + e + Br Based on Energy

Unsymmetric images!? tt Laser beams: Polarized light

Accelleration region Flight Region Reflectron MS Magnetic Reflector

Based on: Without reflectron: With reflectron: Detector t TOF

Nozzle 2) Velocity selction by jet cooling / 2) Hraðaval framkvæmt með “gasúðara”

: Experiments by use of molecular beams/ Detector Collision Molecular beam Detection -Collision complexes determined from scattering patterns John C. Polanyi Nobel prize 1986: Dudley Herzbach Yuan Lee Molec.beam

Light /Ljós ? White light/ Hvítt ljós Gulur Rauður Grænn Blár

Prism /Gler- strendingur / Bylgju- lengd

LASER beam /LASER geisli: Sample /Sýni;sameindir 6 LASERLASER- beam/geisli Monochromatic light / Einlitt ljós (ein bylgjulengd) Anisotropic / mjög stefnuháð High photon concentration / Mikið magn jafnorkuríkra ljóseinda Pulsed or continuus / örstuttir blossar eða samfelld geislun -

Laser activity / Laser virkni:

He/Ne & Dye laser /Lit-LASER

CO 2 and Excimer LASERs

The chemical laser /Efna-Laserinn F + H 2 HF* (v´ > 0) + H

The chemical laser /Efna-Laserinn

Efna-LASER

HOMO LUMO R(A-B) E

E

E

E

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