The controlled synthesis of gigantic polyoxometalates(POMs),as structural model compounds of metal oxides,with tailored functionalities is critical for the understanding of their self-assembly and structure-function r...The controlled synthesis of gigantic polyoxometalates(POMs),as structural model compounds of metal oxides,with tailored functionalities is critical for the understanding of their self-assembly and structure-function relationship;yet,it is very challenging as it requires precise modulation of the connection modes between both fundamental building blocks and imported functionalities on such colossal skeletons.Herein,we describe the controlled synthesis of two types of gigantic POM dimers{Mo_(120)Ce_(6)}_(2),1 and 2,by applying methanol as a modulating solvent and CeIII ions and peptides as functionalities.Upon adoption of methanol as the second solvent together with water,the connection between two{Mo_(120)Ce_(6)}monomers and the way peptides anchor on the surfaces can be well tuned,thus facilely driving the structural transformation from 1 to 2.A rational combination of all these functionalities within porous 1 and 2 realizes the photocatalytic aerobic oxidation of sulfides to sulfoxides.Control experiments revealed that 1 showed the best photocatalytic performance towards a variety of sulfides(yield and selectivity up to 98%)due to the synergistic effect of CeIII sites,the porous skeleton with the optimal cavity and microenvironment as well as surfactant-like peptides.This work may provide a viable strategy by using solvents as modulators to build more gigantic POM clusters with emerging functions.展开更多
The multifunctional properties of rutin have been utilized in the preparation of various pharmaceutical products.As a result,rutin is considered to be one of the most consumed flavonoid substances in pharmaceutical ap...The multifunctional properties of rutin have been utilized in the preparation of various pharmaceutical products.As a result,rutin is considered to be one of the most consumed flavonoid substances in pharmaceutical applications.Hence,researchers have been devoted to developing a simple,cheap and highly efficient electrochemical sensor for the detection of rutin.Nowadays,inorganic nanomaterials,especially metal oxides,with distinct structures and properties are being used for the development of various kinds of electrochemical sensors.The wide band gap values of WO_(3)make it a potentially important sensing material.Therefore,we have synthesized novel CB/WO_(3)nanohybrids using a single step hydrothermal technique and applied them for the electrochemical detection of rutin.In this work,we have chosen the inexpensive and superconductive CB for the synthesis of the nanohybrids,which is an alternative to other carbonaceous materials.The structural,morphological and compositional properties of the synthesized material were systematically characterized by various suitable spectrophotometric techniques.Moreover,the as-prepared electrode materials exhibited a good electrochemical performance towards the electro-oxidation of rutin.Fascinatingly,the lowest LOD of about 2 nM with appreciable linearity from 0.01 to 75.46μM was obtained for the electrochemical determination of rutin.Furthermore,the practical feasibility of the proposed sensor was investigated using commercially available rutin-containing tablets.展开更多
基金supported by the National Natural Science Foundation of China(no.92161111,52372040,21901037,21901038 and 22071148)the Program for Professor of Special Appointment(Eastern Scholar)at Shanghai Institutions of Higher Learning,International Cooperation Fund of Science and Technology Commission of Shanghai Municipality(no.21130750100)+1 种基金the Fundamental Research Funds for the Central Universities(no.2232023D-01,2232023G-07,2232023A-07)the Shanghai Science&Technology Committee(no.22ZR1403300).
文摘The controlled synthesis of gigantic polyoxometalates(POMs),as structural model compounds of metal oxides,with tailored functionalities is critical for the understanding of their self-assembly and structure-function relationship;yet,it is very challenging as it requires precise modulation of the connection modes between both fundamental building blocks and imported functionalities on such colossal skeletons.Herein,we describe the controlled synthesis of two types of gigantic POM dimers{Mo_(120)Ce_(6)}_(2),1 and 2,by applying methanol as a modulating solvent and CeIII ions and peptides as functionalities.Upon adoption of methanol as the second solvent together with water,the connection between two{Mo_(120)Ce_(6)}monomers and the way peptides anchor on the surfaces can be well tuned,thus facilely driving the structural transformation from 1 to 2.A rational combination of all these functionalities within porous 1 and 2 realizes the photocatalytic aerobic oxidation of sulfides to sulfoxides.Control experiments revealed that 1 showed the best photocatalytic performance towards a variety of sulfides(yield and selectivity up to 98%)due to the synergistic effect of CeIII sites,the porous skeleton with the optimal cavity and microenvironment as well as surfactant-like peptides.This work may provide a viable strategy by using solvents as modulators to build more gigantic POM clusters with emerging functions.
基金supported by the Ministry of Science and Technology(MOST 106-2113-M-16027-003),Taiwan,ROC.
文摘The multifunctional properties of rutin have been utilized in the preparation of various pharmaceutical products.As a result,rutin is considered to be one of the most consumed flavonoid substances in pharmaceutical applications.Hence,researchers have been devoted to developing a simple,cheap and highly efficient electrochemical sensor for the detection of rutin.Nowadays,inorganic nanomaterials,especially metal oxides,with distinct structures and properties are being used for the development of various kinds of electrochemical sensors.The wide band gap values of WO_(3)make it a potentially important sensing material.Therefore,we have synthesized novel CB/WO_(3)nanohybrids using a single step hydrothermal technique and applied them for the electrochemical detection of rutin.In this work,we have chosen the inexpensive and superconductive CB for the synthesis of the nanohybrids,which is an alternative to other carbonaceous materials.The structural,morphological and compositional properties of the synthesized material were systematically characterized by various suitable spectrophotometric techniques.Moreover,the as-prepared electrode materials exhibited a good electrochemical performance towards the electro-oxidation of rutin.Fascinatingly,the lowest LOD of about 2 nM with appreciable linearity from 0.01 to 75.46μM was obtained for the electrochemical determination of rutin.Furthermore,the practical feasibility of the proposed sensor was investigated using commercially available rutin-containing tablets.
