| Self-assembly is one of the most original phenomena in the field of life science.Inspired by life system,taking advantage of non-covalent interaction to construct artificial self-assembly systems with different functions has become a hot topic in interdisciplinary research.Supramolecular polymer is a novel system originated from the cross combination of self-assembly and polymer science.It not only has the characteristics of traditional polymer,but also presents novel characteristics such as environmental response,photo-catalysis,self-healing and so on.Nowadays,there are still some scientific problems in the field of supramolecular polymers,such as the relative lack of polymerization systems and polymerization methods,the poor controllability of supramolecular polymerization process,and the further development of functionalization.Hence,it's crucial to develop new supramolecular polymerization systems and controllable polymerization strategies,explore the relationship between the adductivity of non-covalent interactions and the self-assembly behavior of supramolecular polymers and expand the application of supramolecular polymers in life,environment,information,energy and other fields.This paper is devoted to studying the influence of molecular parameters of building elements on supramolecular polymerization behavior and exploring the application of supramolecular polymers in the field of circularly polarized luminescence.In the first part,we sought to investigate the structural isomerism effect in platinum(?)acetylide-based supramolecular polymers by designing two structurally similar monomers.Both compounds contain benzotriazolefunctionalized platinum(?)acetylide as the ?-rod unit.The difference between these two monomers lies in the substitution position of the n-hexyl unit on the benzotriazole motif.The two amides in two monomers are expected to form divalent intermolecular hydrogen bonds,while the dendritic aliphatic chains prevent spontaneous crystallization of the?-organoplatinum(?)core.Accordingly,both compounds are capable of self-assembling into one-dimensional supramolecular nanofibers via nucleation-elongation mechanism in an apolar medium.Depended on the spectroscopic measurements,we studied the effects of structural variation on the photophysical behaviors and self-assembly parameters,and further investigated the differences in macroscopic properties.This work provides a good foundation for us to explore the controlled polymerization of supramolecular polymerization systems.In the second part,we further investigated the co-assembly behaviors of two-component supramolecular systems and their applications in the field of circularly polarized luminescence.The chiral and achiral dicyanodistyrylbenzene compounds were synthesized successfully.After studying the photophysical and self-assembly behaviors of the two monomers,a supramolecular copolymer system was constructed by mixing a small amount of chiral and a large number of achiral molecules in a certain proportion by taking advantage of the structural similarity of the two monomers.The system showed excellent chiral amplification effect.On this basis,we successfully realized the circularly polarized luminescence amplification behavior of the copolymer system by using chiral amplification strategy,which provides an idea for the preparation of new supramolecular circularly polarized luminescence materials. |
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