1H NMR (400 MHz, DMSO-d6) δ 7.88 (td, J = 13.1, 6.4 Hz, 2H), 7.76 (t, J = 12.8 Hz,
1H), 7.63 –7.54 (m, 2H), 7.45 –7.32 (m, 4H), 7.30 –7.16 (m, 2H), 6.54 (td, J = 12.6,
8.9 Hz, 2H), 6.35 (dd, J = 13.7, 2.8 Hz, 2H), 4.06 (t, J = 7.4 Hz, 2H), 3.60 (s, 3H),
2.20 (t, J = 7.2 Hz, 2H), 1.70 (d, J = 8.6 Hz, 2H), 1.64 (d, J = 2.0 Hz, 11H), 1.55 (q, J
= 7.4 Hz, 2H), 1.39 (p, J = 7.5, 6.7 Hz, 2H). HRMS (ESI-TOF): [M+H]+calcd m/z for
C68H76N9O2, 1051.50; found, 1050.61.
备注：λex：750 nm, λmax：773 nm
参考文献： Dyes and Pigments, 2021, 194, 109586
![CO前药，[Fe(CO)4I2]](photo/1712026802.png)
