Organic cocrystal as an emerging assembly strategy has received increasing attention in constructing multiple functional materials,through continually screening suitable constituent monomers or changing their stoichio...Organic cocrystal as an emerging assembly strategy has received increasing attention in constructing multiple functional materials,through continually screening suitable constituent monomers or changing their stoichiometry ratios.However,the role of molecule configuration in the cocrystal field is rarely explored despite the fascinating potential in regulating the packing mode.In this study,the N,N′-diphenyl-5,10-dihydrophenazine derivatives(DPPs) with the flexible scaffold and different methyl substitutions are selected as the donors bearing various molecular configurations.In a simple collaborative way,a series of cocrystals based on DPPs and OFN(octafluoronaphthalene) are fabricated,exhibiting two self-adaptive molecular stacking arrays.X-ray crystallographic analysis and theoretical calculation unveil their different π···π interactions and charge transfer characters,leading to the significant emission redshift up to 125 nm compared with individual DPPs.As a result,controllable molecule stacking structure,tunable emission,and charge transfer properties can be achieved.The study provides a new perspective to reveal the structure-property relationships at the molecular level by controlling the molecule configuration in cocrystal engineering,contributing to the development of cocrystal theoretical physics and organic functional materials.展开更多
Photoluminescent materials play an essential part in the application of polymer systems.However,intrinsic polymer systems have rarely been intuitively interpreted based on photoluminescent regulation.A novel photolumi...Photoluminescent materials play an essential part in the application of polymer systems.However,intrinsic polymer systems have rarely been intuitively interpreted based on photoluminescent regulation.A novel photoluminescent mechanism called vibration-induced emission(VIE)has recently garnered considerable attention due to its multicolor fluorescence from a single molecular entity.展开更多
Herein,we presented a brand-new concept to construct the Forster resonance energy transfer(FRET)based cassette by integrating a vibration-induced emission(VIE)chromophore as the donor.Different from traditional donors...Herein,we presented a brand-new concept to construct the Forster resonance energy transfer(FRET)based cassette by integrating a vibration-induced emission(VIE)chromophore as the donor.Different from traditional donors only with a single emission,the VIE donor possessed well-separated dual emission bands by altering the excited state molecular configuration from the bent state to the planar state.By linking an acceptor such as a cyanine dye(Cy5),a novel VIE-FRET cassette(PPCy5)was prepared.The planar emission profile of the VIE donor moiety could fully cover the absorption of Cy5,and thus the complete FRET process enabled the excellent bimodal spectra difference of 142 nm and ultra-large pseudo-Stokes shift of up to 300 nm.Benefiting from the viscosity-dependent characteristic of the VIE donor,PPCy5 could clearly and intuitively reveal the different viscosity regions in vivo by dual-color and high-resolution imaging.The VIE-FRET paradigm provides an optional platform for developing donor-acceptor-based dual-color fluorescent probes with high-resolution imaging ability.展开更多
基金supported by the National Natural Science Foundation of China (22335004,22004036,22175063)the Shanghai Municipal Science&Technology Major Project (2018SHZDZX-03)+2 种基金the 111 Project (B16017)Shanghai Committee of Science&Technology (17520750100)the Program for Eastern Scholar Distinguished Professor。
文摘Organic cocrystal as an emerging assembly strategy has received increasing attention in constructing multiple functional materials,through continually screening suitable constituent monomers or changing their stoichiometry ratios.However,the role of molecule configuration in the cocrystal field is rarely explored despite the fascinating potential in regulating the packing mode.In this study,the N,N′-diphenyl-5,10-dihydrophenazine derivatives(DPPs) with the flexible scaffold and different methyl substitutions are selected as the donors bearing various molecular configurations.In a simple collaborative way,a series of cocrystals based on DPPs and OFN(octafluoronaphthalene) are fabricated,exhibiting two self-adaptive molecular stacking arrays.X-ray crystallographic analysis and theoretical calculation unveil their different π···π interactions and charge transfer characters,leading to the significant emission redshift up to 125 nm compared with individual DPPs.As a result,controllable molecule stacking structure,tunable emission,and charge transfer properties can be achieved.The study provides a new perspective to reveal the structure-property relationships at the molecular level by controlling the molecule configuration in cocrystal engineering,contributing to the development of cocrystal theoretical physics and organic functional materials.
基金support from the National Natural Science Foundation of China(NSFC nos.21788102,22125803,22020102006,and 21871083)a project supported by Shanghai Municipal Science and Technology Major Project(grant no.2018SHZDZX03)+3 种基金the Program of Shanghai Academic/Technology Research Leader(no.20XD1421300)the“Shu Guang”project supported by the Shanghai Municipal Education Commission and the Shanghai Education Development Foundation(no.19SG26)the Innovation Program of the Shanghai Municipal Education Commission(no.2017-01-07-00-02-E00010)the Fundamental Research Funds for the Central Universities.
文摘Photoluminescent materials play an essential part in the application of polymer systems.However,intrinsic polymer systems have rarely been intuitively interpreted based on photoluminescent regulation.A novel photoluminescent mechanism called vibration-induced emission(VIE)has recently garnered considerable attention due to its multicolor fluorescence from a single molecular entity.
基金This work was supported by the National Natural Science Foundation of China(21788102,21905090,21790361,22004036,91859205)Shanghai Municipal Science and Technology Major Project(2018SHZDZX03)+2 种基金the Program for Professor of Special Appointment(Eastern Scholar)at Shanghai Institutions of Higher Learning,Programme of Introducing Talents of Discipline to Universities(B16017)Shanghai Science and Technology Committee(17520750100)Natural Science Foundation of Shanghai(19ZR1412200),and the Fundamental Research Funds for the Central Universities.
文摘Herein,we presented a brand-new concept to construct the Forster resonance energy transfer(FRET)based cassette by integrating a vibration-induced emission(VIE)chromophore as the donor.Different from traditional donors only with a single emission,the VIE donor possessed well-separated dual emission bands by altering the excited state molecular configuration from the bent state to the planar state.By linking an acceptor such as a cyanine dye(Cy5),a novel VIE-FRET cassette(PPCy5)was prepared.The planar emission profile of the VIE donor moiety could fully cover the absorption of Cy5,and thus the complete FRET process enabled the excellent bimodal spectra difference of 142 nm and ultra-large pseudo-Stokes shift of up to 300 nm.Benefiting from the viscosity-dependent characteristic of the VIE donor,PPCy5 could clearly and intuitively reveal the different viscosity regions in vivo by dual-color and high-resolution imaging.The VIE-FRET paradigm provides an optional platform for developing donor-acceptor-based dual-color fluorescent probes with high-resolution imaging ability.
