Two highly water-soluble amino acids, which derived from β-CDs, i.e., glutamic acid-β-cyclodextrin （GluCD） and ethylene-diamine- β-cyclodextrin （EDCD）, were synthesized and were examined for their effect on sol...Two highly water-soluble amino acids, which derived from β-CDs, i.e., glutamic acid-β-cyclodextrin （GluCD） and ethylene-diamine- β-cyclodextrin （EDCD）, were synthesized and were examined for their effect on solubilization of anthracene （ANT）, complexation of cadmium （Cd^2＋）, and elution removal of ANT and Cd^2＋ in soil. The results showed that GluCD and EDCD were powerful complexant for ANT and Cd^2＋. In the presence of 10 g/L GIuCD and EDCD, the solubilization of ANT increased by 47.04 and 23.85 times compared to the control, respectively. GluCD resulted in approximately 90% complexation of Cd^2＋ while 70% complexation was observed for EDCD. Simultaneously, GluCD and EDCD could greatly enhance the elution removal of ANT and Cd^2＋ from soil. GluCD resulted in the highest elution efficiency of ANT and Cd^2＋. With the addition of 10 g/L GluCD, 53.5% of ANT and 85.6% of Cd^2＋ were eluted, respectively. The ANT had a negligible effect on the Cd^2＋ removal due to different complexing sites of ANT and Cd^2＋, while Cd^2＋ enhanced the ANT removal under the addition of GluCD because Cd^2＋ neutralized the -COOH group of GIuCD. Adversely, the removal of ANT was decreased with Cd^2＋ under the addition of EDCD, this was due to the fact that Cd^2＋ enhanced the polarity of EDCD molecule and inhibited the complexation between ANT and EDCD. The study suggested that GluCD could be preferred and be successfully applied to remediation of heavy metals or organic compounds in contaminated soil.展开更多
Pure organic luminogens with long-persistent luminescence have been extensively studied,on account of their fundamental research significance and diverse utilizations in anticounterfeiting,bioimaging,encryption,organi...Pure organic luminogens with long-persistent luminescence have been extensively studied,on account of their fundamental research significance and diverse utilizations in anticounterfeiting,bioimaging,encryption,organic light-emitting diodes,chemo-sensing,etc.However,time-dependent color-tunable afterglow is rarely reported,especially for single-component materials.In this work,we reported an organic luminogen with time-dependent afterglow,namely,benzoyleneurea(BEU),with multiple persistent room-temperature phosphorescence(p-RTP)and thermally activated delayed fluorescence(TADF)in single crystals.While the lifetime of TADF is relatively short(~1.2 ms),those for p-RTP are as long as around 369~754 ms.The comparable but different decay rates of diversified p-RTP emissions endow BEU crystals with obvious time-dependent afterglow.The existence of multiple emissions can be reasonably illustrated by the clustering-triggered emission(CTE)mechanism.Single-crystal structure illustrates that the combination of benzene ring and nonconventional chromophores of ureide helps facilitate divergent intermolecular interactions,which contribute to the formation of varying emissive species.Moreover,its methyl-and chloro-substituted derivatives show similar multiple p-RTP emissions.However,no time-dependent afterglows are observed in their crystals,due to the highly approaching lifetimes.The afterglow color variation of BEU crystals grants its applications in advanced anticounterfeiting field and information encryption.展开更多
Fabrication of efficient solid luminogens with tunable emission is both fundamentally significant and technically important. Herein, based on our previous strategy for the construction of efficient and multifunctional...Fabrication of efficient solid luminogens with tunable emission is both fundamentally significant and technically important. Herein, based on our previous strategy for the construction of efficient and multifunctional solid luminogens through the combination of diverse aggregation-induced emission （ALE） units with other functional moieties, a group of luminophores with electron donor-acceptor （D-A） structure and typical intramolecular charge transfer （ICT） characteristics, namely CZ-DCDPP, DPA-DCDPP and DBPA-DCDPP were synthesized and investigated. The presence of twisting and AlE-active 2,3- dicyano-S,6-diphenylpyrazine （DCDPP） moiety endows them highly emissive in the solid states, whereas the introduction of arylamines with varied electron-donating capacity and different conjugation render them with tunable solid emissions from green to red. While CZ-DCDPP and DPA-DCDPP solids exhibit distinct mechanochromism, both DPA-DCDPP and DBPA-DCDPP solids can generate efficient red emission. Owing to their high efficiency, remarkable thermal and morphological stabilities and moreover red emission, they are promising for diverse optoelectronic and biological applications.展开更多
基金supported by the Public Foundation of National Environmental Protection Department(No.201009047)Xi’an Science and Technology Plan Projects(No. CXY09025(3))
文摘Two highly water-soluble amino acids, which derived from β-CDs, i.e., glutamic acid-β-cyclodextrin （GluCD） and ethylene-diamine- β-cyclodextrin （EDCD）, were synthesized and were examined for their effect on solubilization of anthracene （ANT）, complexation of cadmium （Cd^2＋）, and elution removal of ANT and Cd^2＋ in soil. The results showed that GluCD and EDCD were powerful complexant for ANT and Cd^2＋. In the presence of 10 g/L GIuCD and EDCD, the solubilization of ANT increased by 47.04 and 23.85 times compared to the control, respectively. GluCD resulted in approximately 90% complexation of Cd^2＋ while 70% complexation was observed for EDCD. Simultaneously, GluCD and EDCD could greatly enhance the elution removal of ANT and Cd^2＋ from soil. GluCD resulted in the highest elution efficiency of ANT and Cd^2＋. With the addition of 10 g/L GluCD, 53.5% of ANT and 85.6% of Cd^2＋ were eluted, respectively. The ANT had a negligible effect on the Cd^2＋ removal due to different complexing sites of ANT and Cd^2＋, while Cd^2＋ enhanced the ANT removal under the addition of GluCD because Cd^2＋ neutralized the -COOH group of GIuCD. Adversely, the removal of ANT was decreased with Cd^2＋ under the addition of EDCD, this was due to the fact that Cd^2＋ enhanced the polarity of EDCD molecule and inhibited the complexation between ANT and EDCD. The study suggested that GluCD could be preferred and be successfully applied to remediation of heavy metals or organic compounds in contaminated soil.
基金We sincerely thank the financial support from the National Natural Science Foundation of China(51822303,52073172)the Natural Science Foundation of Shanghai(20ZR1429400)Also,our gratitude goes to the“Shuguang Program”(20SG11)。
文摘Pure organic luminogens with long-persistent luminescence have been extensively studied,on account of their fundamental research significance and diverse utilizations in anticounterfeiting,bioimaging,encryption,organic light-emitting diodes,chemo-sensing,etc.However,time-dependent color-tunable afterglow is rarely reported,especially for single-component materials.In this work,we reported an organic luminogen with time-dependent afterglow,namely,benzoyleneurea(BEU),with multiple persistent room-temperature phosphorescence(p-RTP)and thermally activated delayed fluorescence(TADF)in single crystals.While the lifetime of TADF is relatively short(~1.2 ms),those for p-RTP are as long as around 369~754 ms.The comparable but different decay rates of diversified p-RTP emissions endow BEU crystals with obvious time-dependent afterglow.The existence of multiple emissions can be reasonably illustrated by the clustering-triggered emission(CTE)mechanism.Single-crystal structure illustrates that the combination of benzene ring and nonconventional chromophores of ureide helps facilitate divergent intermolecular interactions,which contribute to the formation of varying emissive species.Moreover,its methyl-and chloro-substituted derivatives show similar multiple p-RTP emissions.However,no time-dependent afterglows are observed in their crystals,due to the highly approaching lifetimes.The afterglow color variation of BEU crystals grants its applications in advanced anticounterfeiting field and information encryption.
基金supported by the National Natural Science Foundation of China (No. 51473092)the Shanghai Rising-Star Program (No. 15QA1402500)
文摘Fabrication of efficient solid luminogens with tunable emission is both fundamentally significant and technically important. Herein, based on our previous strategy for the construction of efficient and multifunctional solid luminogens through the combination of diverse aggregation-induced emission （ALE） units with other functional moieties, a group of luminophores with electron donor-acceptor （D-A） structure and typical intramolecular charge transfer （ICT） characteristics, namely CZ-DCDPP, DPA-DCDPP and DBPA-DCDPP were synthesized and investigated. The presence of twisting and AlE-active 2,3- dicyano-S,6-diphenylpyrazine （DCDPP） moiety endows them highly emissive in the solid states, whereas the introduction of arylamines with varied electron-donating capacity and different conjugation render them with tunable solid emissions from green to red. While CZ-DCDPP and DPA-DCDPP solids exhibit distinct mechanochromism, both DPA-DCDPP and DBPA-DCDPP solids can generate efficient red emission. Owing to their high efficiency, remarkable thermal and morphological stabilities and moreover red emission, they are promising for diverse optoelectronic and biological applications.
