Toward Multifunctional Polymer Hybrid Through Tunable Charge Transfer Interaction Of Anthracene/Naphthalenediimide

As one of the important supramolecular interactions,charge transfer(CT)interactions possesses easy controlling and wider solvent tolerance performance,which endow the materials with many superior properties,and plays an increasingly important role in the field of hybrid polymer materials.Based on the unique optical properties and reversible controlling nature of CT interactions,this text proposed a new method of fabricating and controlling the functional polymer system.Relevant complexes system including organic-inorganic materials and organic-organic materials.Other than optimizing the functionality of the materials,we also explored its CT interactions deeply to make certain the mechanism consequently to realize the accurate control of its performance.First,an organic-inorganic hybrid solid materials composed of ?-electron-poor naphthalenediimide(NDI)containing polyimide(PI)and ?-electron-rich anthracene(AN)ended polyhedral oligomer silsesquioxane(POSS-AN)were fabricated via blending-solution casting method.The inner CT interactions were characterized and discussed in detail.Combined with the reversible dimerization of anthracene moieties,we obtained the reversible control of the CT interactions.Due to the color change of the CT complexes under the light irradiation and through the adoption of photo masks,we got a micron-grade rewritable pattern on the surface of the hybrids.Besides,the 365 nm UV irradiation can make the anthracene moieties crosslinked thereby increasing the mechanical properties of the hybrids,to the contrary,254 nm UV irradiation or heating can depolymerize it to transfer the system into non-crosslinking,this process make it possible for the crosslinked hybrids to be reprocessed.Furtherly,copolymer of anthracenylmethyl methacrylate and methacrylate(P(AMA-co-MMA)),copolymer of naphthalenediimide methacrylate and methacrylate(P(NDIMA-co-MMA))were synthesized and then blended into solid films.Different proportions of the two components shows different emitting color.Thanks to the inner CT interactions and excellent photo-physical properties of PMMA copolymer,there are two means to tune the emitting color of the composites,one is to change the components ratio,the other is change the illumination time.Among which the ratio of AN and NDI is 1:1 makes the best combination and shows white-light emitting.Similar to the second chapter,we got rewritable patterns on the surface of the complex.Besides,we find that the emitting color shows temperature-dependent phenomenon.This simple way of fabricating and controlling composite materials provides a flexible,simple and efficient idea.