posted on 2019-08-01, 19:37authored byCheng-Xia Chen, Zhang-Wen Wei, Chen-Chen Cao, Shao-Yun Yin, Qian-Feng Qiu, Neng-Xiu Zhu, Yang-Yang Xiong, Ji-Jun Jiang, Mei Pan, Cheng-Yong Su
A zirconium-based
metal–organic framework (Zr-MOF) with
a 2-fold catenated breathing structure is designed, whose framework
contracts in a similarly consecutive manner responsive to solvent
(S), temperature (T), or pressure
(P). As a result, photoluminescence color tuning
(PLCT) can be achieved progressively from blue to yellow, via S, T, or P pathways, leading
to multiple PL states with memory nature. Based on this, a 3D PLCT
coordinate system is established. Along each stimulation pathway,
the starting, ending, and multiple intermediate PLCT states can be
recognized and plotted on the S, T, and P axes of the coordinate system. Furthermore,
multiplexing node-transfer pathways are programmed among the axes,
in which two or three kinds of outer stimuli (S/T/P) are implemented successively and alternatively,
leading to various stages of PL states. This multiplexing approach
provides a new strategy to control and utilize the multiresponsiveness
of PL-MOFs for intriguing applications such as composite nonvolatile
data storage and so on.