High-Efficiency Light Emitters: 10-(Diphenylphosphoryl)-anthracenes from One-Pot Synthesis Including C-O-P to C-P(═O) Rearrangement.

The absorption maxima of nitrile-substituted anthracenes 6-CN- 4g , 6-CN- 6 , and 6-CN- 7 with 10-Ph 2 P=O (432 nm), 10-Ph 2 P=S (448 nm), and 10-Ph 2 P=Se (456 nm) groups on the anthracene backbone ( Table 1 ), respectively, revealed all redshifts compared to the 10-unsubstituted anthracene 9 (411 nm) and a clear trend due to the increasing polarizability of P=O > P=S > P=Se bonds which made electron excitation easier ( Figure 1 d).

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