Organic luminophores with superior solid-state luminescence are urgently required in various fields,such as lighting,display,sensing,and solar energy conversion.However,to achieve their highly efficient luminescence s...Organic luminophores with superior solid-state luminescence are urgently required in various fields,such as lighting,display,sensing,and solar energy conversion.However,to achieve their highly efficient luminescence still remains a challenge.Herein,a newly designed Nile red derivative,Nile-DPA-VB,is successfully obtained to exhibit aggregation-induced emission characteristics with the photoluminescent quantum yield(PLQY)of 11.45%.Such PLQY could be further promoted to 53.45%when Nile-DPA-VB is polymerized undergoing precipitation polymerization process,where the confined aggregation microenvironment severely restricts the intramolecular motions of Nile-DPA-VB.Remarkably,Nile-DPA-VB is ultrasensitive to the polarity and steric effect,enabling the real-time monitoring of aggregation microenvironment evolution for precipitation polymerization.The microphase separation and dynamic hardening for the nucleation and growth processes are visually demonstrated,which contribute dominantly to the high-efficiency luminescence.Finally,by doping the as-prepared fluorescent polymeric particles into polymethyl methacrylate,functional films with high luminescence and high haze are achieved to show the potential in lighting.These findings clearly demonstrate the significant role of polymerization in constructing high-efficiency solid-state luminescent materials for practice.展开更多
An AIEgen decorated porphyrin(TPETPyP)was easily obtained through a one-step reaction.The bulky TPE in TPETPyP greatly impeded the intermolecularπ-πstacking of the porphyrin core,which significantly suppressed aggre...An AIEgen decorated porphyrin(TPETPyP)was easily obtained through a one-step reaction.The bulky TPE in TPETPyP greatly impeded the intermolecularπ-πstacking of the porphyrin core,which significantly suppressed aggregation-caused quenching(ACQ)effect of TPETPyP in aqueous solution.The four pyridinium salts formed in TPETPyP also render the whole molecule water solubility,which eliminated its aggregation.TPETPyP exhibited 1O2 quantum yield as high as 0.85 in PBS.Moreover,it also showed high binding affinity to proteins,the major biotarget of 1O2.The high 1O2 quantum yield plus the great binding ability of TPETPyP toward proteins makes it a highly-efficient protein photocleaving agent.Protein electrophoresis experiments demonstrated that TPETPyP can photocleave BSA upon visible light irradiation,indicating that TPETPyP can act as a promising photosensitizer(PS)in PDT.The work here will provide a facile strategy to utilize AIEgens modified traditional PSs for photodynamic therapy(PDT).展开更多
Powder dusting method is the most practically useful approach for latent fingerprint development in the crime scene. Herein, a general powder dusting method has been explored for latent fingerprint development based o...Powder dusting method is the most practically useful approach for latent fingerprint development in the crime scene. Herein, a general powder dusting method has been explored for latent fingerprint development based on aggregation-induced emission luminogens(AIEgens). A series of tetraphenylethene(TPE) derivatives with multiple diphenylamine(DPA), namely, TPE-DPA,TPE-2 DPA and TPE-4 DPA, were selected as candidates to dope with magnetic powders and applied for latent fingerprint development. After screening, the magnetic powder 3 doped with TPE-4 DPA proves to be the best, in terms of fluorescent intensity, resolution and adhesiveness. Afterwards, the magnetic powder 3 was applied for visualization of latent fingerprint on various smooth and porous substrates, including glass, stainless steel, leaf, ceram, plastic bag, lime wall, wood and paper money.Specific details, such as island, core, termination and bifurcation, can be clearly observed for the fluorescent fingerprint images.展开更多
Organic conjugated materials combining high conductivity with strong solid-state emission are highly desired for organic electronic applications,yet still rather rare.Herein,a novel luminogen(TEN)comprised by linking ...Organic conjugated materials combining high conductivity with strong solid-state emission are highly desired for organic electronic applications,yet still rather rare.Herein,a novel luminogen(TEN)comprised by linking naphthalene diimides and triphenyl ethylene with vinyl bridges is reported.TEN exhibits aggregation-induced emission(AIE)behavior of a strong nearinfrared fluorescence over 700 nm and the efficiency above 60.5%in the solid state,while also shows promising application in vivo bio-imaging with good permeability and extremely low background.Single crystal of TEN reveals intra-and intermolecular C–H…O hydrogen bonds,contributing to an inclined molecular stacking along the a-axis of the cell,creating a 1 D charge carrier transporting channel under a shortπ-πinteraction distance of 3.42?,which might benefit the solid emission and charge transport ability simultaneously.Solution processed bottom contact,top gate organic field effect transistors based on TEN reveal a high ambipolar charge transport ability with the hole mobility up to 0.13 cm2 V-1 s-1 and electron mobility up to0.010 cm2 V-1 s-1.Further atomic force microscopy and X-ray diffraction analysis on TEN thin film confirm the existence of the1 Dπ-πstacking channel,suggesting the stacking geometry revealed in crystal crucial for facilitating high charge carrier mobility while preserving the strong solid emission at the same time.展开更多
Materials showing metallophilic interactions continue to attract considerable theoretical and experimental attention largely because of their unusual and unanticipated photophysical behavior as well as their unique st...Materials showing metallophilic interactions continue to attract considerable theoretical and experimental attention largely because of their unusual and unanticipated photophysical behavior as well as their unique stimuli-responsive behavior in an aggregate or solid state.Metallophilic interactions are mostly found between metals with either identical(d^(10)–d^(10))or different(s^(2)–d^(8),d^(8)–d^(10))configurations.Among various metallophilic interactions,aurophilic interactions(Au⋯Au)are well-known and widely reported.In this study,a new phosphorescent gold(I)complex,[(CF_(3)Ph)_(3)PAuC≡CPh](TPPGPA)was reported.展开更多
基金supported by the National Natural Science Foundation of China(52373171,52173154,52221006,22375014)the Beijing Natural Science Foundation Grant(JQ23006),and the Fundamental Research Funds for the Central Universities(ZY2404).
文摘Organic luminophores with superior solid-state luminescence are urgently required in various fields,such as lighting,display,sensing,and solar energy conversion.However,to achieve their highly efficient luminescence still remains a challenge.Herein,a newly designed Nile red derivative,Nile-DPA-VB,is successfully obtained to exhibit aggregation-induced emission characteristics with the photoluminescent quantum yield(PLQY)of 11.45%.Such PLQY could be further promoted to 53.45%when Nile-DPA-VB is polymerized undergoing precipitation polymerization process,where the confined aggregation microenvironment severely restricts the intramolecular motions of Nile-DPA-VB.Remarkably,Nile-DPA-VB is ultrasensitive to the polarity and steric effect,enabling the real-time monitoring of aggregation microenvironment evolution for precipitation polymerization.The microphase separation and dynamic hardening for the nucleation and growth processes are visually demonstrated,which contribute dominantly to the high-efficiency luminescence.Finally,by doping the as-prepared fluorescent polymeric particles into polymethyl methacrylate,functional films with high luminescence and high haze are achieved to show the potential in lighting.These findings clearly demonstrate the significant role of polymerization in constructing high-efficiency solid-state luminescent materials for practice.
基金National Natural Science Foundation of China(Nos.21663005,21871060,21804022 and 21702016)the Natural Science Foundation of Jiangxi Province(Nos.2018ACB21009,20181BAB213007)+2 种基金the Science and Technology Project of the Education Department of Jiangxi Province of China(No.GJJ170846)the Special Graduate Student Innovation Fund of Jiangxi Province(No.YCX18B007)Beijing National Laboratory for Molecular Sciences(No.BNLMS201813)for the financial support
文摘An AIEgen decorated porphyrin(TPETPyP)was easily obtained through a one-step reaction.The bulky TPE in TPETPyP greatly impeded the intermolecularπ-πstacking of the porphyrin core,which significantly suppressed aggregation-caused quenching(ACQ)effect of TPETPyP in aqueous solution.The four pyridinium salts formed in TPETPyP also render the whole molecule water solubility,which eliminated its aggregation.TPETPyP exhibited 1O2 quantum yield as high as 0.85 in PBS.Moreover,it also showed high binding affinity to proteins,the major biotarget of 1O2.The high 1O2 quantum yield plus the great binding ability of TPETPyP toward proteins makes it a highly-efficient protein photocleaving agent.Protein electrophoresis experiments demonstrated that TPETPyP can photocleave BSA upon visible light irradiation,indicating that TPETPyP can act as a promising photosensitizer(PS)in PDT.The work here will provide a facile strategy to utilize AIEgens modified traditional PSs for photodynamic therapy(PDT).
基金supported by the Opening Project Fund of Shanghai Key Laboratory of Criminal Scene Evidence (201123417049)the Academician Foundation of the Ministry of Public Security of China (2011-23214203, 23215243, 23317015)+4 种基金Program for Young Innovative Research Team in China University of Political Science and Law (18CXTD09, 16CXTD05)the National Natural Science Foundation of China (21788102)the Research Grants Council of Hong Kong (16308116, C2014-15G, A-HKUST605/16, C6009-17G)the Nissan Chemical Industries Ltd., the AIEgen Biotech Co. Ltd., the Innovation and Technology Commission (ITC-CNERC14SC01)the Science and Technology Plan of Shenzhen (JCY20160229205601482)
文摘Powder dusting method is the most practically useful approach for latent fingerprint development in the crime scene. Herein, a general powder dusting method has been explored for latent fingerprint development based on aggregation-induced emission luminogens(AIEgens). A series of tetraphenylethene(TPE) derivatives with multiple diphenylamine(DPA), namely, TPE-DPA,TPE-2 DPA and TPE-4 DPA, were selected as candidates to dope with magnetic powders and applied for latent fingerprint development. After screening, the magnetic powder 3 doped with TPE-4 DPA proves to be the best, in terms of fluorescent intensity, resolution and adhesiveness. Afterwards, the magnetic powder 3 was applied for visualization of latent fingerprint on various smooth and porous substrates, including glass, stainless steel, leaf, ceram, plastic bag, lime wall, wood and paper money.Specific details, such as island, core, termination and bifurcation, can be clearly observed for the fluorescent fingerprint images.
基金the China Scholarship Councilthe National Natural Science Foundation of China(21702016,21905015)+1 种基金the Chongqing Science and Technology Commission(cstc2018jcyj AX0091)the Fundamental Research Funds for the Central Universities(2019CDQYHG023)。
文摘Organic conjugated materials combining high conductivity with strong solid-state emission are highly desired for organic electronic applications,yet still rather rare.Herein,a novel luminogen(TEN)comprised by linking naphthalene diimides and triphenyl ethylene with vinyl bridges is reported.TEN exhibits aggregation-induced emission(AIE)behavior of a strong nearinfrared fluorescence over 700 nm and the efficiency above 60.5%in the solid state,while also shows promising application in vivo bio-imaging with good permeability and extremely low background.Single crystal of TEN reveals intra-and intermolecular C–H…O hydrogen bonds,contributing to an inclined molecular stacking along the a-axis of the cell,creating a 1 D charge carrier transporting channel under a shortπ-πinteraction distance of 3.42?,which might benefit the solid emission and charge transport ability simultaneously.Solution processed bottom contact,top gate organic field effect transistors based on TEN reveal a high ambipolar charge transport ability with the hole mobility up to 0.13 cm2 V-1 s-1 and electron mobility up to0.010 cm2 V-1 s-1.Further atomic force microscopy and X-ray diffraction analysis on TEN thin film confirm the existence of the1 Dπ-πstacking channel,suggesting the stacking geometry revealed in crystal crucial for facilitating high charge carrier mobility while preserving the strong solid emission at the same time.
基金supported by the National Natural Science Foundation of China(no.21788102)the Natural Science Foundation of Guangdong Province(nos.2019B121205002 and 2019B030301003)+1 种基金the Research Grants Council of Hong Kong(nos.16305618,16305518,16304819,C6009-17G,and C6014-20W)the Innovation and Technology Commission(no.ITC-CNERC14SC01).
文摘Materials showing metallophilic interactions continue to attract considerable theoretical and experimental attention largely because of their unusual and unanticipated photophysical behavior as well as their unique stimuli-responsive behavior in an aggregate or solid state.Metallophilic interactions are mostly found between metals with either identical(d^(10)–d^(10))or different(s^(2)–d^(8),d^(8)–d^(10))configurations.Among various metallophilic interactions,aurophilic interactions(Au⋯Au)are well-known and widely reported.In this study,a new phosphorescent gold(I)complex,[(CF_(3)Ph)_(3)PAuC≡CPh](TPPGPA)was reported.
