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Perylene diimide-based supramolecular polymer with temperature-sensitive ratiometric fluorescence responsiveness in solution and gels
來(lái)源:陳建教授個(gè)人網(wǎng)站 發(fā)布日期:2020-09-23
作者:Jie Liua, Yubing Zhanga, Chonghua Zhanga, Peisheng Zhanga, Rongjin Zenga,*, Jiaxi Cuib,*, Jian Chena
關(guān)鍵字:fluorescent polymer nanoparticles; fluorescence resonance energy transfer (FRET); ratiometric fluorescence detection; data encryption; fluorescent imaging
論文來(lái)源:期刊
發(fā)表時(shí)間:2020年

Novel amphiphilic fluorescence building block with perylene diimide (PDI) as core and quadruple H-bonding groups (UPy) as wings (UPy-PDI-UPy) has been synthesized. It shows interesting thermo-responsive ratiometric dual-emission properties in both aqueous solution and hydrogel state. Further contrast experiments with other two analogous derivatives as UPyTPDI-UPy and TEG-PDI-TEG indicated that the presence of supramolecular aggregation induced emission enhancement effect between UPy-PDI-UPy molecules is ascribe to the synergetic effect of intermolecular intrinsic π?π stacking, hydrophobic effect and highly directional quadruple H-bonding. In DMF/H2O (v: v=1: 1), UPy-PDI-UPy self-assembles into nanoparticles with obviously ratiometric fluorescence responsiveness towards temperature in the range of 20-80 °C. Moreover, UPy-PDI-UPy can form a thermo-responsive hydrogel by dispersing in PEG-containing aqueous. The hydrogels show a temperature-dependent ratiometric dual-emission with a narrow responsive range of 20-39 °C and excellent renewable property. This innovative research helps to fabricate novel responsive luminescent materials by using supramolecular self-assembly behavior.


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