Ultralong organic afterglow materials are being actively explored as attractive candidates for a wide range of applications such as data storage,security inks,emergency lighting,etc.,due to their unique long-lived exc...Ultralong organic afterglow materials are being actively explored as attractive candidates for a wide range of applications such as data storage,security inks,emergency lighting,etc.,due to their unique long-lived excited state properties and inherent advantages of low cost,appreciable functionality and ease of preparation.In the last three years,much effort has been devoted to achieving efficient ultralong afterglow from organic small molecules,which possess controllable intermolecular interactions and defined energy levels,making them a good platform to suppress the non-radiative decays,hence stabilizing the excitons for efficient afterglow emissions at room temperature.Nevertheless,there has been a lack of reviews on how efficient ultralong organic afterglow can be systematically achieved from small molecular host-vip materials,which is not conducive to the development of the field.In this review,we have outlined and summarized small-molecule ultralong organic afterglow materials based on different emission mechanisms.We have included emission mechanisms involving ultralong room-temperature phosphorescence(URTP),ultralong thermally activated delayed fluorescence(UTADF)and organic long persistent luminescence(OLPL),where the latter two mechanisms have rarely been reported.In addition,challenges and future perspectives are discussed to emphasize the future directions.展开更多
Photochromic polymer is defined as a series of materials based on photochromic units in polymer chains,which produces reversible color changes under irradiation with a particular wavelength.Currently,as the research p...Photochromic polymer is defined as a series of materials based on photochromic units in polymer chains,which produces reversible color changes under irradiation with a particular wavelength.Currently,as the research progresses,it shows increasing potential applications in various fields,such as anti-counterfeiting,information storage,super-resolution imaging,and logic gates.However,there is a paucity of published reviews on the topic of photochromic polymers.Herein,this review discusses and summarizes the research progress and prospects of such materials,mainly summarizing the basic mechanisms,classification,and applications of azobenzene,spiropyran,and diarylethene photochromic polymers.Moreover,3-dimensional(3D)printable photochromic polymers are worthy to be summarized specifically because of its innovative approach for practical application;meanwhile,the developing 3D printing technology has shown increasing potential opportunities for better applications.Finally,the current challenges and future directions of photochromic polymer materials are summarized.展开更多
基金financial support from the NSF of China(62275217,T.Y.)Natural Science Basic Research Programme of Shaanxi(2024JC-JCQN-51,T.Y.)a start-up grant from City University of Hong Kong(9610637,C.-Y.C.).
文摘Ultralong organic afterglow materials are being actively explored as attractive candidates for a wide range of applications such as data storage,security inks,emergency lighting,etc.,due to their unique long-lived excited state properties and inherent advantages of low cost,appreciable functionality and ease of preparation.In the last three years,much effort has been devoted to achieving efficient ultralong afterglow from organic small molecules,which possess controllable intermolecular interactions and defined energy levels,making them a good platform to suppress the non-radiative decays,hence stabilizing the excitons for efficient afterglow emissions at room temperature.Nevertheless,there has been a lack of reviews on how efficient ultralong organic afterglow can be systematically achieved from small molecular host-vip materials,which is not conducive to the development of the field.In this review,we have outlined and summarized small-molecule ultralong organic afterglow materials based on different emission mechanisms.We have included emission mechanisms involving ultralong room-temperature phosphorescence(URTP),ultralong thermally activated delayed fluorescence(UTADF)and organic long persistent luminescence(OLPL),where the latter two mechanisms have rarely been reported.In addition,challenges and future perspectives are discussed to emphasize the future directions.
基金supported by the Fundamental Science Center Funds(62288102)the NSF of China(62275217)+1 种基金Natural Science Basic Research Program of Shaanxi(2024JC-JCQN-51)the Postgraduate Innovation Fund of Northwestern Polytechnical University(PF2024125).
文摘Photochromic polymer is defined as a series of materials based on photochromic units in polymer chains,which produces reversible color changes under irradiation with a particular wavelength.Currently,as the research progresses,it shows increasing potential applications in various fields,such as anti-counterfeiting,information storage,super-resolution imaging,and logic gates.However,there is a paucity of published reviews on the topic of photochromic polymers.Herein,this review discusses and summarizes the research progress and prospects of such materials,mainly summarizing the basic mechanisms,classification,and applications of azobenzene,spiropyran,and diarylethene photochromic polymers.Moreover,3-dimensional(3D)printable photochromic polymers are worthy to be summarized specifically because of its innovative approach for practical application;meanwhile,the developing 3D printing technology has shown increasing potential opportunities for better applications.Finally,the current challenges and future directions of photochromic polymer materials are summarized.
