Fu Chun Yu Lab Notebooks

12/5/50

weight of bottle = 21.800 g " " 1 ml D₂O = 1.120 g

weight of MnSO₄·H₂O = 16.9 g

29.3 20 cc of H₂O added to form 100/3 cc solution

Saturation expt of O¹⁷ resonance with a sample of enriched H₂O¹⁷ in 0.00019 M MnSO₄ solution

Assume saturation occurs at H₁ = 0.1

Saturation expt of D² resonance with sample of 3.38 N D₂O + 3 M MnSO₄

G ~ 55

12/10/50

The siqnal amplitudes & width of O¹⁷ & D² resonances were compared at the same magnetic field

O¹⁷ Height = 41.7 ± 2.6 , Width = 40.0 ± 2.4 enriched H₂O¹⁷ +0.00019M MnSO₄

D² 1.20N D²O Height = 82 ± 4 Width = 66 ± 4 +3M MnSO₄

a ≡ amplitude

I (I+1) n γ³ / ΔH² ------------------------------------------------------------ I_D(I_D+1) n_D γ³_D / ΔH²_D

= a ----- a_D

I(I+1) = I_D(I_D+1)(n_D / n)(γ_D / γ)³ {aΔH² / a_DΔH²}

= 2x 1.70/0.1 x 1.45 x 42x40²/82x66² (1+14.5%) x 0.96 correction factor for difference in rates

=8.90 (1+14.5%)

I = 2.52 ± 0.[?] % abundance of O¹⁷ = 0.18 Molarity of O¹⁷ = 55.55 x 0.18 = 0.1

11/23/50

Proton resonances from the following two samples were compared under identical conditions:

Sample volume = 4 cc Molarity of Mn⁺⁺ = 0.75 Gain = 60 H_s = 0.086 G H₁ = 1 1/2 cell ~ 0.089 G Rate = D H₀ ~ 1500 G

(a) 4.256 g 99.5 % D₂O was added to 0.507 g. MnSO₄·H₂O to form 4 cc solution. It contains H to 1.28 M (b) 4 cc. of 0.75 M Mn⁺⁺ in H₂O

Size of signal from sample (a) = 65.1

" " " " " (b) = 13.5 (attenuated to a factor 1/200)

Conclusion: [illegible] If attentuation factor is correct, % purity of D₂O is 98.2%

Oct. 12, '50

Frequency of Pd¹⁰⁵ in H₂PdCl₄ compound with that of Cl³⁵ in HCl.

H₀ = 10830 G

[Break]

Pd¹⁰⁵ (6240 --> 6230 KC) in H₂PdCl₆

Cl³⁵ (4510 --> 4500 KC) in HCl

Actually the resonance is due to O¹⁷ in H₂O

Be^9 Both are at the same frequency, leakage and phase. D^2

August 12, 1950 Preparation of Na3 Rh(NO2)6 m.w. [molecular weight] NaNO2 = 69.01 m.w. RhCl3 = 209.3 a.w. [atomic weight] Rh = 102.9

One gram of commercial RhCl3 was dissolved in 75 cc. of 1 m. NaNo2 & 5 cc. of 6 m. HC2H3O2; the mixture was heated at 60-90 degrees for 5 minutes. (A.A. Noyes & W. C. Bray, A sysem of qualitative analysis for rare elements, The MacMillan Company, 1948)

Sept. 2 - Sept. 12 Search for As, Zn, using KAsF6 & Zn(CH)4 + HF concentrated in water bath.

Zn 3.41 ML -> 3.015 ML at Ho = 11400 G

[tape marks on page: something missing? See Page 8]

July 1, '50

Measurement of the resonance frequencies of Re¹⁸⁵ & Re¹⁸⁷ relative to that of Na²³

ν(Na²³) = 7526.1 (1 ± 7 x 10^-5) Kc (1/4M NaCl + 1M MnSO₄

Schüler & Korsching's value 1.01069 ± 0.00043 obtained from the hfs of λ 4889 in ReI spectrum.