Stable luminescent diphenylamine biphenylmethyl radicals with α-type D 0 → D 1 transition and antiferromagnetic properties

transition. Besides, in a 2(2Cl(m)PhN)-BTM crystal we for the first time observed strong antiferromagnetic interactions among luminescent radicals through SQUID measurements. This work offers design insights into luminescent radicals with α-type transition for future development.