Xiao Lu, Wu Yishi, Yu Zhenyi, Xu Zhenzhen, Li Jinbiao, Liu Yanping, Yao Jiannian, Fu Hongbing
Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
Chemistry. 2018 Feb 6;24(8):1801-1805. doi: 10.1002/chem.201705391. Epub 2018 Jan 16.
Organic room-temperature phosphorescence (ORTP), when combined with external stimuli-responsive capability, is very attractive for sensors and bio-imaging devices, but remains challenging. Herein, by doping two β-iminoenamine-BF derivatives (S-2CN and S-2I) into a 4-iodoaniline (I-Ph-NH ) crystalline matrix, the formation of S-2CN⋅⋅⋅I-Ph-NH and S-2I⋅⋅⋅I-Ph-NH halogen bonds leads to bright-red RTP emissions from these two host-guest doped crystals (hgDCs) with quantum efficiencies up to 13.43 % and 15.96 %, respectively. Upon treatment with HCl, the competition of I-Ph-NH ⋅HCl formation against S-2I⋅⋅⋅I-Ph-NH halogen bonding switches off the red RTP from S-2I/I-Ph-NH hgDCs, whereas the stable halogen-bonded S-2CN⋅⋅⋅I-Ph-NH ensures red RTP from S-2CN/I-Ph-NH hgDCs remains unchanged. A security protection luminescence pattern by using these different HCl-responsive RTP behaviors was designed.
有机室温磷光（ORTP）与外部刺激响应能力相结合时，对传感器和生物成像设备极具吸引力，但仍具有挑战性。在此，通过将两种β-亚氨基烯胺-BF衍生物（S-2CN和S-2I）掺杂到4-碘苯胺（I-Ph-NH ）晶体基质中，S-2CN⋅⋅⋅I-Ph-NH和S-2I⋅⋅⋅I-Ph-NH卤键的形成导致这两种主客体掺杂晶体（hgDCs）发出亮红色RTP发射，量子效率分别高达13.43%和15.96%。用HCl处理后，I-Ph-NH ⋅HCl形成与S-2I⋅⋅⋅I-Ph-NH卤键形成的竞争使S-2I/I-Ph-NH hgDCs的红色RTP熄灭，而稳定的卤键S-2CN⋅⋅⋅I-Ph-NH确保S-2CN/I-Ph-NH hgDCs的红色RTP保持不变。利用这些不同的HCl响应RTP行为设计了一种安全保护发光图案。
