Binary amorphous solids consisting of 2,4,6-triarylphenoxyl radicals and their dimers

Preparation of solid solution and crystal-glass composite consisting of stable phenoxyl radical and its phenol analogue

“…1 OH and 1 M were synthesized according to the literature procedure. 17,28 The purity of 1 M was confirmed as follows. Since 1 M was prepared from 1 OH , possible impurities were (unreacted) 1 OH and by-products.…”

“…Amorphous solids I was prepared as reported previously. 17 Crystal II suitable for single-crystal X-ray analysis was obtained by slow evaporation of 5 mg of 1 OH in a mixture of ethyl acetate and hexane (15 mL) for a few days. Solid solutions III were given when 2 mg of 1 OH and 2 mg of 1 M (as I) was dissolved in distilled acetone (10 mL), the mixed solution was evaporated for 12 h, then the precipitated deep purple needles were filtered from mother solution.…”

“…1 M owns a unique characteristic that it can yield both amorphous solid (I) consisting of 1 M and its equilibrium dimer 1 D (where 1 M : 1 D = 0.09 : 0.91) and crystal consisting solely of 1 D depending on solidification solvents. 17 Since there was no report on solidification behaviour of combination of such unique phenoxyl radicals and their phenol analogues, solidification behaviour of 1 M and its phenolic analogue (1 OH ) has been examined herein.…”