. 2017 Feb 2;121(12):6626–6634. doi: 10.1021/acs.jpcc.6b12097

Table 2. Comparison of Spin–Lattice Relaxation Times T₁ and Signal-to-Noise in a Single 90°-Acquired Experiment of Dilute (Methanol-d₄) and Neat Solutions at 8.5 and 1 T^a.

compound	conc. [mM]	T₁ @ 8.5 T [min]	T₁ @ 1 T [min]	S/N @ 8.5 T	S/N @ 1 T
¹⁵N-pyridine	50	1.05 ± 0.02	2.06 ± 0.13	5700	1500
¹⁵N-acetonitrile	50	2.05 ± 0.02	3.73 ± 0.05	5000	2900
¹⁵N-benzonitrile	50	2.15 ± 0.02	11.95 ± 0.35	7300	1400
¹⁵N₂-diazirine	50	0.16 ± 0.002	4.35 ± 0.1	1200	1300
pyridine	neat (12.4 M)	1.5 ± 0.05	3.31 ± 0.3	300	300
pyridine-d₅	neat (12.4 M)	1.6 ± 0.02	3.68 ± 0.45	1300	400
acetonitrile	neat (19.1 M)	2.2 ± 0.05	2.3 ± 0.4	1000	200
acetonitrile-d₃	neat (19.1 M)	2.36 ± 0.03	2.01 ± 0.1	1900	400
benzonitrile	neat (9.7 M)	2.88 ± 0.03	10.5 ± 1	7100	2600

Neat solutions have ¹⁵N at natural abundance (0.36%).

Table 2. Comparison of Spin–Lattice Relaxation Times T1 and Signal-to-Noise in a Single 90°-Acquired Experiment of Dilute (Methanol-d4) and Neat Solutions at 8.5 and 1 Ta.