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Figs 12 and 13 illustrate the PL intensity and maximum emission wavelength of the compounds. As can be seen in Fig. 12, the intensities of2B-TPAand3B-TPAexhibited a slight decrease in PL enhancement upon the addition of water before the starting point, but an increase in the PL intensities of the three compounds was observed with the further addition of water after the starting points. After reaching a maximum, the PL intensities of the three compounds decreased with the increase in water content. This phenomenon was often observed in some compounds with AIE or AIEE properties, but the reasons remain unclear. Thus far, there are two possible explanations for this phenomenon. |
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