Organic Multifunctional Luminescent Materials Based on Modified Phenyl Derivatives
The photoelectric properties of organic luminescent materials with large conjugated structures are closely related to molecular structure and intermolecular interaction.As a basic rigid conjugated unit between large π conjugation and C=X,phenyl has the characteristics of high stability,simple structure and direct relationship between structure and properties,and is the best model compound for studying the excited state properties of obtained luminescent materials.However,phenyl is a liquid at room temperature and becomes a solid at generally harsh low temperatures.Therefore,if the phenyl is fixed in a variety of environmentally responsive skeletons containing heteroatoms,and its condensed state structure and excited state properties will be effectively studied in a wide range,it will solve the important scientific problem of how the phenyl emollients can emit light under different aggregation states.In this paper,the recent advances in the modification of phenyl by heterocycles,conjugation extension of phenyl,substitution of peripheral heteroatoms,bridge between phenyl and other combined strategies are reviewed.The applications of modified phenyl in the synthesis of fluorescent materials,metal-organic complexes or clusters phosphorescent materials,thermally-activated delayed fluorescent materials,aggregation-induced luminescent materials and pure organic room temperature phosphorescent materials were reviewed according to different luminescence mechanisms.Finally,the future research focus and development prospect of organic multifunctional luminescent materials based on modified phenyl are also prospected.
phenylchemically modifiedorganic multifunctional luminescent materialsfluorescencemetal-organic complexes or clusters phosphorescencethermally activated delayed fluorescenceaggregation-induced emissionpure organic room temperature phosphorescence