Pure organic room-temperature phosphorescence(RTP)materials have attracted wide attention owing to their excellent luminescent properties and great potential in various applications.In this work,iminostilbene and its ...Pure organic room-temperature phosphorescence(RTP)materials have attracted wide attention owing to their excellent luminescent properties and great potential in various applications.In this work,iminostilbene and its analogues are applied to realize RTP emission by copolymerizing with acrylamide.It can be concluded that the growth of alkane chain in monomers can enhance the lifetime and photoluminescence quantum yield of RTP emission,and polymers with the larger conjugated structure of the monomer show a longer RTP emission wavelength.This work provides a series of new pure organic RTP materials and might provide new thoughts for designing more advanced and superior RTP materials.展开更多
A large number of reaction systems are composed of hydrophobic interfaces and microorganisms in natural environment.However,it is not clear how microorganisms adjust their breathing patterns and respond to hydrophobic...A large number of reaction systems are composed of hydrophobic interfaces and microorganisms in natural environment.However,it is not clear how microorganisms adjust their breathing patterns and respond to hydrophobic interfaces.Here,Shewanella oneidensis MR-1 was used to reduce ferrihydrite of a hydrophobic surface.Through Fe(II)kinetic analysis,it was found that the reduction rate of hydrophobic ferrihydrite was 1.8 times that of hydrophilic one.The hydrophobic surface of the mineral hinders the way the electroactive microorganism uses the water-soluble electron mediator riboflavin for indirect electron transfer and promotes MR-1 to produce more liposoluble quinones.Ubiquinone can mediate electron transfer at the hydrophobic interface.Ubiquinone-30(UQ-6)increases the reduction rate of hydrophobic ferrihydrite from 38.5±4.4 to 52.2±0.8 mM$h1.Based on the above experimental results,we propose that liposoluble electron mediator ubiquinone can act on the extracellular hydrophobic surface,proving that the metabolism of hydrophobic minerals is related to endogenous liposoluble quinones.Hydrophobic modification of minerals encourages electroactive microorganisms to adopt differentiated respiratory pathways.This finding helps in understanding the electron transfer behavior of the microbes at the hydrophobic interface and provides new ideas for the study of hydrophobic reactions that may occur in systems,such as soil and sediment.展开更多
基金the financial support from the National Natural Science Foundation of China (Nos. 21788102, 22125803, 22020102006 and 21871083)Program of Shanghai Academic/Technology Research Leader (No. 20XD1421300)+2 种基金‘Shu Guang’ Project supported by Shanghai Municipal Education Commission and Shanghai Education Development Foundation (No. 19SG26)the Innovation Program of Shanghai Municipal Education Commission (No. 2017–01–07–00–02-E00010)the Fundamental Research Funds for the Central Universities.
文摘Pure organic room-temperature phosphorescence(RTP)materials have attracted wide attention owing to their excellent luminescent properties and great potential in various applications.In this work,iminostilbene and its analogues are applied to realize RTP emission by copolymerizing with acrylamide.It can be concluded that the growth of alkane chain in monomers can enhance the lifetime and photoluminescence quantum yield of RTP emission,and polymers with the larger conjugated structure of the monomer show a longer RTP emission wavelength.This work provides a series of new pure organic RTP materials and might provide new thoughts for designing more advanced and superior RTP materials.
基金This study was supported by grants from the National Key R&D Program of China(2018YFC1800502)the National Natural Science Foundation of China(nos.42021005 and 22025603)the FJIRSM&IUE Joint Research Fund(RHZX-2018-006).
文摘A large number of reaction systems are composed of hydrophobic interfaces and microorganisms in natural environment.However,it is not clear how microorganisms adjust their breathing patterns and respond to hydrophobic interfaces.Here,Shewanella oneidensis MR-1 was used to reduce ferrihydrite of a hydrophobic surface.Through Fe(II)kinetic analysis,it was found that the reduction rate of hydrophobic ferrihydrite was 1.8 times that of hydrophilic one.The hydrophobic surface of the mineral hinders the way the electroactive microorganism uses the water-soluble electron mediator riboflavin for indirect electron transfer and promotes MR-1 to produce more liposoluble quinones.Ubiquinone can mediate electron transfer at the hydrophobic interface.Ubiquinone-30(UQ-6)increases the reduction rate of hydrophobic ferrihydrite from 38.5±4.4 to 52.2±0.8 mM$h1.Based on the above experimental results,we propose that liposoluble electron mediator ubiquinone can act on the extracellular hydrophobic surface,proving that the metabolism of hydrophobic minerals is related to endogenous liposoluble quinones.Hydrophobic modification of minerals encourages electroactive microorganisms to adopt differentiated respiratory pathways.This finding helps in understanding the electron transfer behavior of the microbes at the hydrophobic interface and provides new ideas for the study of hydrophobic reactions that may occur in systems,such as soil and sediment.
