posted on 2021-06-29, 17:05authored byTaoyu Weng, Qi Zou, Man Zhang, Bin Wu, Glib V. Baryshnikov, Shen Shen, Xuanying Chen, Hans Ågren, Xiaoyong Jia, Liangliang Zhu
Controllable
aggregation-induced emission luminogens (AIEgens)
by photoexcitation can be conducted within a single solvent, thus
opening new opportunities for preparing and processing smart materials.
However, undesired side-reactions like photooxidation that can easily
occur in the organic phase remain, limiting their applications. To
enhance the operability of photoexcitation-controlled AIEgens (to
specifically produce a phosphorescence characteristic) in the organic
phase, in this work, we employ a typical prototype, hexathiobenzene,
usually as the specific phosphorescent group, and investigate a series
of physical and chemical factors, such as light intensity, dissolved
oxygen content, and solvent polarity, to explore ways to control the
photoexcitation-controllable AIEgens against the impurities from side-reactions.
An organogel strategy was also developed to minimize interference
factors and improve the practical application ability. We believe
that the presented results provide new insights into the further development
of the photoexcitation-based functional materials and the promotion
of their practical usage.