Table 2 Parameters for the DOSY experiments of AETAC-co-AAm (sample B) used in our previous studies (Run 1) [37, 46] and in the present study (Run 2)a

From: 1H DOSY analysis of high molecular weight acrylamide-based copolymer electrolytes using an inverse-geometry diffusion probe

Run

1

2

Spectrometer

JEOL JNM-ECA

Bruker Avance NEO

Probe

5 mm GR

5 mm Diff BBI

Observed frequency (MHz)

500

400

Δ (ms)

100

10

δ (ms)

2.0

2.5

tg (μs)

238

0.5

Te (ms)

50

5

n

32

128

Number of G steps

32

64

Shape of the gradient pulse

square

smooth square

G1 (G/cm)

100

80

Gmax (G/cm)

1100

1720

S/N of the (CH3)N+ resonanceb

263.7

861.5

S/N of the CH2 resonanceb

9.9

47.0

  1. aDOSY experiments in D2O at 40 °C. tg denotes the gradient recovery time (see Fig. 1 for the other abbreviations of the delay times (Δ, δ, Te)); n is the number of gradient steps (linear G ramp); and G1 and Gmax are the strengths of the minimum (the first) and maximum (the n-th) gradients, respectively
  2. bSignal-to-noise ratio for the 1D spectrum obtained at G1. An exponential apodization function (LB = 3.0 Hz) was applied prior to the Fourier transform along the F2 dimension. The noise region for the S/N calculations was 6.5–10.0 ppm
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