Materials with blue-shifted and enhanced emission exhibit extensive applications in information encryption,solar ultraviolet sensing and ink-free printing,however,preparing blue-shifted and enhanced emission from phot...Materials with blue-shifted and enhanced emission exhibit extensive applications in information encryption,solar ultraviolet sensing and ink-free printing,however,preparing blue-shifted and enhanced emission from photo-responsive material remains a significant challenge.Herein,we designed and synthesized successfully the photo-responsive ionic-bonded organic crystals(IOC)using tetraphenylethylene(TPE)-based multidentate imidazolium salt and sulfonic acid.Impressively,the discernible response of IOC to UV light is evidenced by a blue shift and an enhancement in dilute solution.Specifically,this has resulted in a significant increase in the absolute quantum yield,from 7.0%to 41.3%.This remarkable efficiency can be attributed to the cooperative effect that reduces non-radiative processes,the restriction of intermolecular motions(RIM)and the modulation of charge transfer(CT)behavior.This work first reports blue-shifted and enhanced emission from ionic crystal,providing a new strategy to achieve photochromic materials.展开更多
This work presents a generic strategy to create a series of metal mercaptides complexes via coordination selfassembly between transition metals(Mn,Cu,Co,Fe,and Ni)and cysteine(Cys)by forming the sulfur-metal bridges.T...This work presents a generic strategy to create a series of metal mercaptides complexes via coordination selfassembly between transition metals(Mn,Cu,Co,Fe,and Ni)and cysteine(Cys)by forming the sulfur-metal bridges.This strategy involves dissolving metal chlorides and Cys into deep eutectic solvents(DES),followed by the precipitation of metal mercaptides complexes(such as Cys-Mn)by adding water as an antisolvent,where DES serves as the solvent,shape directing,and capping agent,thereby preventing the formation of other metal impurities.Interestingly,the prepared complexes possess both laccase and peroxidase-like properties,allowing the design of a technique for the detection of L-3,4-dihydroxyphenylalanine(L-DOPA)and uric acid,respectively.The prepared Cys-Mn can linearly oxidize L-DOPA with its concentrations from 0.1 to 130μM and the detection limit was calculated to be 75.5 n M.Additionally,the Cys-Mn can mimic the activity of peroxidase towards oxidization of o-phenylenediamine at neutral p H,allowing single-step and one-pot cascade reactions for visual and fluorometric measurements of uric acid(UA)that could work in the range of 0.2-500μM UA with a detection limit of 0.06μM and 0.054μМ,respectively.The assay was successful in detecting UA in serum and urine samples with relative standard deviation(RSD)ranging from 7.3%to 10.2%and 3.0%-8.5%respectively,suggesting that it may prove useful in medical diagnostic testing.展开更多
基金the Gansu Natural Science Foundation(No.21JR7RA076)LICP Cooperation Foundation for Young Scholars(No.HZJJ23-6)for financial support。
文摘Materials with blue-shifted and enhanced emission exhibit extensive applications in information encryption,solar ultraviolet sensing and ink-free printing,however,preparing blue-shifted and enhanced emission from photo-responsive material remains a significant challenge.Herein,we designed and synthesized successfully the photo-responsive ionic-bonded organic crystals(IOC)using tetraphenylethylene(TPE)-based multidentate imidazolium salt and sulfonic acid.Impressively,the discernible response of IOC to UV light is evidenced by a blue shift and an enhancement in dilute solution.Specifically,this has resulted in a significant increase in the absolute quantum yield,from 7.0%to 41.3%.This remarkable efficiency can be attributed to the cooperative effect that reduces non-radiative processes,the restriction of intermolecular motions(RIM)and the modulation of charge transfer(CT)behavior.This work first reports blue-shifted and enhanced emission from ionic crystal,providing a new strategy to achieve photochromic materials.
基金supported by the National Natural Science Foundation of China(Nos.21822407 and 22074154)the Chinese Academy of Sciences-the World Academy of Sciences(CAS-TWAS)President’s Fellowship Program+2 种基金CAS“Light of West China”ProgramYouth Innovation Promotion Association CAS(2021420)the Foundation for Sci&Tech Research Project of Gansu Province(20JR5RA573,20JR10RA045)
文摘This work presents a generic strategy to create a series of metal mercaptides complexes via coordination selfassembly between transition metals(Mn,Cu,Co,Fe,and Ni)and cysteine(Cys)by forming the sulfur-metal bridges.This strategy involves dissolving metal chlorides and Cys into deep eutectic solvents(DES),followed by the precipitation of metal mercaptides complexes(such as Cys-Mn)by adding water as an antisolvent,where DES serves as the solvent,shape directing,and capping agent,thereby preventing the formation of other metal impurities.Interestingly,the prepared complexes possess both laccase and peroxidase-like properties,allowing the design of a technique for the detection of L-3,4-dihydroxyphenylalanine(L-DOPA)and uric acid,respectively.The prepared Cys-Mn can linearly oxidize L-DOPA with its concentrations from 0.1 to 130μM and the detection limit was calculated to be 75.5 n M.Additionally,the Cys-Mn can mimic the activity of peroxidase towards oxidization of o-phenylenediamine at neutral p H,allowing single-step and one-pot cascade reactions for visual and fluorometric measurements of uric acid(UA)that could work in the range of 0.2-500μM UA with a detection limit of 0.06μM and 0.054μМ,respectively.The assay was successful in detecting UA in serum and urine samples with relative standard deviation(RSD)ranging from 7.3%to 10.2%and 3.0%-8.5%respectively,suggesting that it may prove useful in medical diagnostic testing.
