Table 1.

T₁ and T_m of selected stable organic radical qubits

Radicala	Concentration / mmol·L−1	Frequency / GHz	Solvent	Temperature / K	T1 / μs	Tm / μs	Reference
OX63D	1	9.5	H2O: glycerol = 4:6	77	3334a	NAb	Chen et al.101
		95			5000a
OX63D	NAb	9.5	MeOH	300	16.5	5.8	Kuzhelev et al.102
		34			15.6	1.8
OX63D	NAb	9.5	H2O	300	16.0	7.3	Kuzhelev et al.102
		34			15.3	2.2
OX63D	NAb	9.5	D2O	300	16.1	7.6	Kuzhelev et al.102
		34			16.1	2.0
OX63D	NAb	9.5	CHCl3	300	11.4	9.1	Kuzhelev et al.102
		34			11.2	5.4
BDPA	0.0007	9.5	Toluene	Ambient	12c	9.8c	Meyer et al.103
DPPH	0.012	9.5	Toluene	Ambient	2.0c	1.3c	Meyer et al.103
PDT	0.25	9.5	H2O	Ambient	0.56	0.59	Meyer et al.103
2,5-DTBSQ	0.3	9.5	Ethanol	Ambient	7.8c	3.2c	Elajaili et al.104
TEMPO	1.0	9.5	H2O: glycerol = 1:1	295a	2.00c	NAb	Sato et al.105
Tempone	0.3	9.5	H2O: glycerol = 1:1	100	100c	5c	Nakagawa et al.106
Tempol	3	9.5	Sucrose octaacetate	298a	19.95c	NAb	Sato et al.107
DTBN	3	9.5	Sucrose octaacetate	250a	5.6c	0.40c	Sato et al.107
TEIO	3	9.5	Sucrose octaacetate	300a	25.12c	0.63c	Sato et al.107
PCTM	0.2-0.5	9.5	Toluene : CHCl3 = 4:1	298	10c	NAb	Kathirvelu et al.108
PtTTFtt	0.05	9.5	DCM	298	1.44c	0.34c	McNamara et al.109
NIT-polyphenylene	NAb	9.4	Powder	300a	1.43c	0.6c	Slota et al.92
NIT-GNRs	NAb	9.4	Powder	300a	1.43c	0.2c	Slota et al.92
C50-LA90	1%d,e	9.73	NAb	30	2102	0.186	Hou et al.110
		9.65		298	25.02	0.148
C50-LA140	0.7%d,e	9.73	NAb	30	3522	0.300	Hou et al.110
		9.65		298	29.62	0.213
C50-LA400	0.4%d,e	9.73	NAb	30	5173	0.377	Hou et al.110
		9.65		298	29.23	0.318
MgHOTP	0.66%e	9.4	NAb	296	10.55	0.153	Sun et al.111
				296	21.61f	0.202f
TAPPy-NDI	0.01%e	9.4	NAb	100	790	1.26	Oanta et al.112
				296	30.2	0.49
Ni-HATI_iPr	1%e	9.7	NAb	100	3c	0.09c	Lu et al.113
PTCM	0.1%e	9.26	NAb	100	150c	1.5c	Dai et al.114
				298	35.6	1.08
TEMPO SAM	NAb	9.47	NAb	10	9200	13.53	Tesi et al.115
BTEV-BTR	1%e	9	NAb	80	386	4.39	Poryvaev et al.116

See the full collection of data in Table S2.

^aAbbreviations are consistent with those in Figures S1-S4.

^bNot available.

^cValue estimated from a figure in the reference.

^dvalue estimated from the synthetic condition.

^eMolar percentage of the radical.

^fMgHOTP soaked in THF.