Sodium diethyldithiocarbamate (DDTC-Na) was demonstrated to be a new colorimetric cyanide chemosensor by utilizing an indirect trick. First, some copper ions were added to the colorless aque- ous solution of DDTC-Na. ...Sodium diethyldithiocarbamate (DDTC-Na) was demonstrated to be a new colorimetric cyanide chemosensor by utilizing an indirect trick. First, some copper ions were added to the colorless aque- ous solution of DDTC-Na. Then, the resultant brown solution was studied upon the addition of different anions, including Cl-, I-, IO3-, SO42-, NO-2, Br-, H2PO4-, F-, SCN-, HSO-4, ClO-4 and CN-. It was observed by naked eyes that the brown solution changed to colorless immediately after the addition of the trace cyanide, but there were no changes towards other anions, making DDTC-Na a good selective cyanide chemosensor in pure water.展开更多
A variety of DNA-based probes are utilized for the detections of multiple analytes and DNA nanotechnology has been thriving for recent decades and achieving numerous nanostructures,mainly focusing on DNA morphology mo...A variety of DNA-based probes are utilized for the detections of multiple analytes and DNA nanotechnology has been thriving for recent decades and achieving numerous nanostructures,mainly focusing on DNA morphology modulation and multifunctional systems engineered into to the complicated works.Among the numerous detections,fluorescence method is a non-invasive,highly selective and sensitive means for varieties of applications,but their emissions are often compromised by the aggregation-caused quenching(ACQ)effect,which weakens their applications.The aggregation induced emission luminogens(AIEgens)are created with non emissive or weakly emissive in a low concentration but emit strong fluorescence in a high concentration with aggregated states.Herein,numerous functionalized AIEgens have been emerged and used for detection and imaging and DNA-modified AIEgen probes are introduced.In this vein,here we report the progress on DNA-modified AIEgen probes in recent years and highlight their conjugation strategies including covalent bonding,electrostatic interaction and their applications of biosensing.Moreover,multiple DNA strands are needed to introduce into the DNA-modified AIEgen probes for more purposes.At the end,some challenges are mentioned to discuss the new trend of DNA-modified AIEgen probes.展开更多
Many researchers,however,found that(1)the flow of both liquid and gas through nanoscale pores is one to even seven orders of magnitude faster than that would be predicted from the classic Newton’s mechanic theories,s...Many researchers,however,found that(1)the flow of both liquid and gas through nanoscale pores is one to even seven orders of magnitude faster than that would be predicted from the classic Newton’s mechanic theories,such as the Hagen-Poiseuille equation,the Bernoulli’s principle,the Knudsen theory;(2)the seeming contradiction that K+channels conduct K+ions at maximal throughput rates while not permeating slightly smaller Na+ions,which have perplexed scientists for decades.Herein we propose a possible explanation for the above phenomena based on the Wave-Particle Dualism.The quantum effect on ultrafast flow could possibly provide a new perspective for studying the nature of the ion and molecule channels,which are the backbones for the biology,and possibly promote the development of new methods for energy conversion,desalination of sea water and even information systems.展开更多
基金Supported by the National Natural Science Foundation of China (Grant Nos. 20674059 & 20402011)
文摘Sodium diethyldithiocarbamate (DDTC-Na) was demonstrated to be a new colorimetric cyanide chemosensor by utilizing an indirect trick. First, some copper ions were added to the colorless aque- ous solution of DDTC-Na. Then, the resultant brown solution was studied upon the addition of different anions, including Cl-, I-, IO3-, SO42-, NO-2, Br-, H2PO4-, F-, SCN-, HSO-4, ClO-4 and CN-. It was observed by naked eyes that the brown solution changed to colorless immediately after the addition of the trace cyanide, but there were no changes towards other anions, making DDTC-Na a good selective cyanide chemosensor in pure water.
基金This work was supported by the National Key R&D Program of China(No.2020YFA0211200)the National Natural Science Foundation of China(Nos.21974128,21874121)+2 种基金the Natural Science Foundation of Hubei Province,China(No.2019CFA043)supported by the Open Research Fund of the State Key Laboratory of Bioelectronics(Southeast University),China and the Hubei Postdoctoral Innovative Research Foundation,China(to Wu Jun)the Project Funded by China Postdoctoral Science Foundation(No.2020M672436).
文摘A variety of DNA-based probes are utilized for the detections of multiple analytes and DNA nanotechnology has been thriving for recent decades and achieving numerous nanostructures,mainly focusing on DNA morphology modulation and multifunctional systems engineered into to the complicated works.Among the numerous detections,fluorescence method is a non-invasive,highly selective and sensitive means for varieties of applications,but their emissions are often compromised by the aggregation-caused quenching(ACQ)effect,which weakens their applications.The aggregation induced emission luminogens(AIEgens)are created with non emissive or weakly emissive in a low concentration but emit strong fluorescence in a high concentration with aggregated states.Herein,numerous functionalized AIEgens have been emerged and used for detection and imaging and DNA-modified AIEgen probes are introduced.In this vein,here we report the progress on DNA-modified AIEgen probes in recent years and highlight their conjugation strategies including covalent bonding,electrostatic interaction and their applications of biosensing.Moreover,multiple DNA strands are needed to introduce into the DNA-modified AIEgen probes for more purposes.At the end,some challenges are mentioned to discuss the new trend of DNA-modified AIEgen probes.
基金supported by the National Natural Science Foundation of China(Nos.22090050,22090053,21974126,21874121,51803194)the Zhejiang Provincial Natural Science Foundation,China(No.LY19B030001)+1 种基金the Open-end Funds from the Engineering Research Center of Nano-Geomaterials of Ministry of Education,China(No.NGM2019KF013)the Fundamental Research Funds for National Universities,China University of Geosciences(Wuhan).
文摘Many researchers,however,found that(1)the flow of both liquid and gas through nanoscale pores is one to even seven orders of magnitude faster than that would be predicted from the classic Newton’s mechanic theories,such as the Hagen-Poiseuille equation,the Bernoulli’s principle,the Knudsen theory;(2)the seeming contradiction that K+channels conduct K+ions at maximal throughput rates while not permeating slightly smaller Na+ions,which have perplexed scientists for decades.Herein we propose a possible explanation for the above phenomena based on the Wave-Particle Dualism.The quantum effect on ultrafast flow could possibly provide a new perspective for studying the nature of the ion and molecule channels,which are the backbones for the biology,and possibly promote the development of new methods for energy conversion,desalination of sea water and even information systems.
