The creation of a new photoluminescent platform to study their photo physics and further applications is important in the fields of chemistry,material,physics,etc.In this work,we developed benzene-based fluorophores g...The creation of a new photoluminescent platform to study their photo physics and further applications is important in the fields of chemistry,material,physics,etc.In this work,we developed benzene-based fluorophores generated by chemical reactions on conjugate acceptor precursors.Their optical properties have been studied,and the large Stokes shifts,high molar extinction coefficients and quantum yields have been revealed.The starting precursors containing bis-intercalated vinyl thioester shows no luminescence,which is turned on by the chemically triggered cyclization.From spectroscopic,crystallographic,and computational studies,cyclization-induced emission enhancement is proposed as a mean to explain the photoluminescent performances,a principle extended in the substituent incorporated fluorophores.Furthermore,they were applied to the chemically triggered degradation of a polymer and achieved visual tracking,quantifying,and downcycling of the processes.The method for designing and developing series fluorophores and visually tracking polymer degradation represents a new photoluminescent platform,allowing its further applications.展开更多
To realize a fast,easy-operation and precise way using fluorescence probes to quantify analytes is a goal to facilitate detection,especially in situ.Herein,we are reporting an approach which can be generally employed ...To realize a fast,easy-operation and precise way using fluorescence probes to quantify analytes is a goal to facilitate detection,especially in situ.Herein,we are reporting an approach which can be generally employed for the differentiation and quantitation of analytes through fluorescence chromaticity and luminosity.Seven representative fluorescent probes,targeting p H,cysteine,hydrogen sulfide,hydrogen peroxide,palladium and hydrazine,were synthesized and tested.Without utilizing costly instrumentations,portable devices were employed to collect data of photographs from the fluorescence samples in responses to different analytes.Subsequently,the photographic images were digitally processed to generate calibration curves between chromaticity/luminosity verse concentrations after mapping to the CIE 1931 xy Y standard color space.Good linear calibration curves and quantitative analysis of unknown samples with low errors through the spectral technology demonstrated the reliability of this method.Thus,we showed the analytical method with a simple and on-site constructible/portable device which is promising for applications in more fluorescence probes.展开更多
文摘The creation of a new photoluminescent platform to study their photo physics and further applications is important in the fields of chemistry,material,physics,etc.In this work,we developed benzene-based fluorophores generated by chemical reactions on conjugate acceptor precursors.Their optical properties have been studied,and the large Stokes shifts,high molar extinction coefficients and quantum yields have been revealed.The starting precursors containing bis-intercalated vinyl thioester shows no luminescence,which is turned on by the chemically triggered cyclization.From spectroscopic,crystallographic,and computational studies,cyclization-induced emission enhancement is proposed as a mean to explain the photoluminescent performances,a principle extended in the substituent incorporated fluorophores.Furthermore,they were applied to the chemically triggered degradation of a polymer and achieved visual tracking,quantifying,and downcycling of the processes.The method for designing and developing series fluorophores and visually tracking polymer degradation represents a new photoluminescent platform,allowing its further applications.
基金the National Natural Science Foundation of China(No.21907080)Natural Science Foundationof Shaanxi(No.2020JM-069)+1 种基金Key Scientific Research Group of Shaanxi Province(No.2020TD-009)the Youth Innovation Team of Shaanxi Universities。
文摘To realize a fast,easy-operation and precise way using fluorescence probes to quantify analytes is a goal to facilitate detection,especially in situ.Herein,we are reporting an approach which can be generally employed for the differentiation and quantitation of analytes through fluorescence chromaticity and luminosity.Seven representative fluorescent probes,targeting p H,cysteine,hydrogen sulfide,hydrogen peroxide,palladium and hydrazine,were synthesized and tested.Without utilizing costly instrumentations,portable devices were employed to collect data of photographs from the fluorescence samples in responses to different analytes.Subsequently,the photographic images were digitally processed to generate calibration curves between chromaticity/luminosity verse concentrations after mapping to the CIE 1931 xy Y standard color space.Good linear calibration curves and quantitative analysis of unknown samples with low errors through the spectral technology demonstrated the reliability of this method.Thus,we showed the analytical method with a simple and on-site constructible/portable device which is promising for applications in more fluorescence probes.
