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Analysis, 200707 :. Mw 1 91 1 12 245 3.4641 13 254 3.60555 14 262 3.74166 15 271 3.87298 24 335 4.89898 25 341 5 26 347 5.09902 27 354 5.19615 28 359 5.2915 32 382 5.65685 33 388 5.74456 34 393 5.83095. pnt. Sqrt(Mw). “agust, heima../HF/mass calibr-200707ak.ppt”. pnt.
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Analysis, 200707 : Mw1 91 1 12 245 3.4641 13 254 3.60555 14 262 3.74166 15 271 3.87298 24 335 4.89898 25 341 5 26 347 5.09902 27 354 5.19615 28 359 5.2915 32 382 5.65685 33 388 5.74456 34 393 5.83095 pnt Sqrt(Mw) “agust, heima../HF/mass calibr-200707ak.ppt”
pnt Coefficient values ± one standard deviation a = 28.432 ± 0.321 b = 62.538 ± 0.0686 Sqrt(Mw)
Wave7 vs pnt; 200707 From “agust,heima.. /HF/fra Wang/ Pure HF 1 bar mass-190707.pxp” pnt
37Cl+ H35Cl+ Conclusion relevant to ion species observed: H37Cl+ 35Cl+ H+ C2FH4+ CH3+ C2FH3+ C2H5+ C2FH2+ C2H4+ C2FH+ C+ CH2+ C2H3+ CH+ C2H2+ CFH3+ C2H+ CFH2+ CFH+ Wave7 vs pnt; 200707 From “agust,heima.. /HF/fra Wang/ Pure HF 1 bar mass-190707.pxp” Skimmer out C2+ pnt
Comments: • Most probably the ion species (and the F containing species in particular) are formed via radical • reactions, such as between F and oil (CxHy), for example: • F + CxHy ->->-> C2,. ...CFH,... Followed by • N hv + C2,...CFH... ->-> C2+,...CFH+ • F can not be formed by 2 hv excitation of the monomer in this region (see : e-mail 5.6.07 • (http://www.hi.is/~agust/rannsoknir/rempi/hf/REMPI%20signal.txt) and • http://www.hi.is/~agust/rannsoknir/rempi/hf/HF-pot-090307.ppt and EJ calculations (http://www.hi.is/~agust/rannsoknir/rempi/hf/EJ-080307.xls) ) • The ion signals increase as HF is diluted according to KM (e-mail 12.06.07 / agust,heima,.. • /REMPI/HF/KM/Massspectra vs %HF-120607.pxp) • Hence probably F is formed after excitation of oligomers (dimer): • (HF)n + 2hv -> (HF)n* followed by dissociation, such as: • (HF)n* -> F + ... (which is what Andras Bodes calculations suggest • (http://www.hi.is/~agust/rannsoknir/rempi/hf/PES-011106.pdf)! • -in which case these signals are measurements of (HF)n !!!!
Comments: Furthermore: the “HF)2” signal recorded in 2005 is in fact a mass near 24 – 26 (see e-mail from me to Wang and KM 190707) and could be C2 or C2H formed as: (HF)2 + 2 hv ->-> F or H F + C2H2 -> HF + C2H Followed by C2H + n hv ->-> C2H+ NB!: C2H2 had been used on the vacuum line before we did the HF experiments