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MALDI-TOF:

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Presentation on theme: "MALDI-TOF:"— Presentation transcript:

1

2 MALDI-TOF: http://www.raust.is/2003/1/13/raust2003-1-13.pdf

3 http://biopedia.org/index.php/MALDI-TOF-MS MALDI-TOF:

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

5 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

6 1xh 2 E AB AB + + e AB**

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

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

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

10 out Voltage devider HV - 2Kv HX nozzle Turbo Pump TOF lense MCP detector oscilloscope computer Excimer Laser In út Dye- Laser SHG Time delay 200-1200  S laser control Pellin Broca prism SHG control In REMPI- TOF

11 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

12 Orka HCCH: HCCH*:

13 Orka C2C2 H2H2 HCCH*: C2C2 + +

14 Orka HCCH*:

15 Orka HCCH*: CH 2 C

16 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

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

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

19 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

20 Intensity Mw 1 3512 H+H+ 35 Cl + H 35 Cl + H 37 Cl + 12 C + Two photon resonance excitation= 82842.36 cm -1 Mass spectrum RCl = HCl

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

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

23 2xhv Mw /amu 35 Cl + 37 Cl + H 37 Cl + H 35 Cl + H+H+ /cm -1

24 2xhv/ cm -1 Mw/amu 35 Cl + 37 Cl + H 37 Cl + H 35 Cl + H+H+

25

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

27 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

28 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

29 MCP detector Based on http://en.wikipedia.org/wiki/Photofragment-ion_imaging

30 = MCP (Micro Channel Plates = Charge-Couple Device camera Based on http://pubs.rsc.org/en/content/articlelanding/2010/cp/c001233e#!divAbstract http://pubs.rsc.org/en/content/articlelanding/2012/cp/c2cp40822h#!divAbstract

31 = MCP (Micro Channel Plates = Charge-Couple Device camera http://pubs.rsc.org/en/content/articlelanding/2010/cp/c001233e#!divAbstract http://pubs.rsc.org/en/content/articlelanding/2012/cp/c2cp40822h#!divAbstract

32 r(I-Br) I + Br I + Br* tt I + +e + Br* I + + e + Br Based on http://www.chem.queensu.ca/people/faculty/Stolow/Research/QCVibrational.htmlhttp://www.chem.queensu.ca/people/faculty/Stolow/Research/QCVibrational.html Energy

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

34 https://www.physics.umn.edu/research/workshops/fluorescence/Fluoro4.pdf

35

36 Accelleration region Flight Region Reflectron MS Magnetic Reflector

37 Based on: http://msr.dom.wustl.edu/reflectrons-ion-mirrors/ Without reflectron: With reflectron: Detector t TOF

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

39

40

41 1975-1990: 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

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

43 Prism /Gler- strendingur / Bylgju- lengd

44 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 -

45 Laser activity / Laser virkni:

46 He/Ne & Dye laser /Lit-LASER

47 CO 2 and Excimer LASERs

48 The chemical laser /Efna-Laserinn F + H 2 HF* (v´ > 0) + H http://perg.phys.ksu.edu/vqm/laserweb/ch-6/f6s1t9p4.htm

49 The chemical laser /Efna-Laserinn

50 Efna-LASER

51 HOMO LUMO R(A-B) E

52 E

53 E

54 E

55 http://www.raust.is/2003/1/13/raust2003-1-13.pdf

56 http://www.magnet.fsu.edu/education/tutorials/tools/ionization_esi.html http://www.rsc.org/chemistryworld/Issues/2003/February/together.asp http://www.rsc.org/chemistryworld/Issues/2003/February/together.asphtt p://www.rsc.org/chemistryworld/Issues/2003/February/together.asp


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