Synthesis, Self-assembly And Fluorescence Properties Of Hyperbranched Polyester Low-dimensional Nanomaterials

Hyperbranched polyester(HBPE)is a kind of highly branched compounds which contains reactive functional groups at its periphery.In recent years,the self-assemble of HBPE attracted great interest due to it's unique physical and chemical properties.However,most of the current research works all focus on the structures and properties of the three-dimensional(3D)hyperbranched polymers(HBPs)nano materials.The study on the structures and properties of the one-dimensional(1D)and two-dimensional(2D)HBPEs nano materials is sparsely reported.Therefore,in this paper,the synthesis and self-assemble of the low dimensional(1D or 2D)HBPEs were systematically described.In addition,the fluorescence response of HBPEs to aromatic compounds and heavy metal ions were studied.The structurally controllable hyperbranched aromatic-aliphatic copolyesters HBPE-MPICB4 and HBPE-MPICB2 were synthesized by modifying the periphery of a second-generation hyperbranched polyester(HBPE)with the derivative of pyrrole[2,1-a]isoquinoline(MPICB)groups,in ethyl acetate solution,they could self-assemble to the 2D hyperbranched aromatic-aliphatic copolyester HBPE-MPICB4 and HBPE-MPICB2 nano layers.However,in the ethanol solution,they could self-assemble to the 3D hyperbranched aromatic and aliphatic copolyesters HBPE-MPICB4 micro flowers and HBPE-MPICB2 micro vesicles.The host-guest fluorescence response of the functionalized HBPE-MPICBs to the aromatic compounds were studied.The results showed that the highly branched HBPE-MPICB4 showed the better fluorescence response to the fused ring compound pyrene.The structurally controllable hyperbranched aromatic-aliphatic copolyesters HBPE-PPICA2,HBPE-PPICHBA1 and HBPE-PPICHEA1 were synthesized by modifying the periphery of a second-generation hyperbranched polyester(HBPE)with the derivatives of 2-phenyl pyrrole[2,1,5-cd]indolizine(PPICA,PPICHBA and PPICHEA)respectively,the 3D or 1D hyperbranched aromatic-aliphatic copolyester HBPE-PPICA2 nanospheres and HBPE-PPICHBA1,HBPE-PPICHEA1 micro/nano bamboo-like chain were obtained.The fluorescence response of these functionalized HBPE-PPICA2,HBPE-PPICHBA1 and HBPE-PPICHEA1 nano particles to aromatic compounds were studied.HBPE-PPICA2 nanospheres showed better fluorescence response to aromatic compounds,such as aniline and 3-amino acetophenone.while HBPE-PPICHBA1 and HBPE-PPICHEA1 long chain showed selective fluorescence response to the fused ring compound anthracene and pyrene.The structurally controllable 1D hyperbranched aromatic-aliphatic copolyesters HBPE-PPIBA1 nano-rods were synthesized by modifying the periphery of a second-generation hyperbranched polyester(HBPE)with derivative of 8-phenyl-10,11-azine pyrrole[2,1-a]isoquinoline(PPIBA).The host-guest fluorescence response of the hyperbranched polyester HBPE-PPIBA1 to the aromatic compounds was studied.The results showed that HBPE-PPIBA1 nano-rods could be used as fluorescent probe for aromatic compounds,such as aniline and 3-amino acetophenone.The structurally controllable hyperbranched aromatic-aliphatic copolyesters HBPE-PPICE4 and HBPE-PPICE1 vesicles were synthesized by modifying the periphery of a second-generation hyperbranched polyester(HBPE)with the derivative of pyridine[4',5':4,5]pyrrole(PPICE).The host-guest fluorescence response of the hyperbranched polyester HBPE-PPICE4 and HBPE-PPICE1 to the heavy metals was studied.The results showed HBPE-PPICE1 vesicles could be used as fluorescent probe for Fe3+.