Synthesis, characterization, and photophysical properties of novel 9‑phenyl-9-phosphafluorene oxide derivatives

• Shuxian Qiu,
• Duan Dong,
• Jiahui Li,
• Huiting Wen,
• Jinpeng Li,
• Yu Yang,
• Shengxian Zhai and
• Xingyuan Gao

Beilstein J. Org. Chem. 2024, 20, 3299–3305, doi:10.3762/bjoc.20.274

• Chemistry & Environmental Engineering, Anyang Institute of Technology, Anyang 455000, China 10.3762/bjoc.20.274 Abstract A novel series of D−A−D-type 9-phenyl-9-phosphafluorene oxide (PhFlOP) derivatives was prepared and is reported herein. The synthetic protocol involved 5 steps from commercially

• studies, revealing that their photophysical behavior can be affected by the different substituents in the donor carbazole group. Keywords: carbazole; D−A−D type; noble-metal-free system; 9‑phenyl-9-phosphafluorene oxide; photophysical properties; Introduction π-Conjugated molecular materials containing

• -performing PO-based luminescent molecules [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] due to the benign electron injection/transport capability of PO-containing groups. Among them, 9-phenyl-9-phosphafluorene oxide (PhFlOP) is one of the most popular core units [22][23][24][25][26