Developing candidate materials that are equipped with the ability of both selective detection and efficient removal of pesticides is greatly desirable for the environment and public health.However,most of reported mat...Developing candidate materials that are equipped with the ability of both selective detection and efficient removal of pesticides is greatly desirable for the environment and public health.However,most of reported materials usually possess single function,which considerably limits their applications as sensors or captures.Herein,two fluorescent composites,ZIF-8@Au Ag NPs and ZIF-8-Au Ag NPs,are prepared by the integration of Au/Ag nanoparticles(M NPs)and a zeolite imidazolate framework(ZIF-8),presenting a more stable fluorescent performance compared with pure Au Ag NPs.The characterizations unravel that ZIF-8@Au Ag NPs exhibits a core shell type structure,whereas ZIF-8-Au Ag NPs are indicative of a dispersed loading type motif.ZIF-8-Au Ag NPs features a significant fluorescent quenching effect for three commonly used dinitroaniline pesticides in aqueous matrices.Then,pendimethalin(PDA)is selected as a representative of dinitroaniline pesticides to thoroughly develop the potential applications in the fields of detection and extraction.Impressively,ZIF-8-Au Ag NPs made of ZIF-8 shell embedded with Au Ag NPs can achieve fluorescence sensing for PDA in a low concentration range with the limit of detection(LOD)of 4.2 nmol/L from aqueous solution and agricultural products,attributed to the combination of competition mechanism and electron transfer.Moreover,ZIF-8-Au Ag NPs possesses high adsorption capacity of125 mg/g for PDA at p H 6,depending on the synergistic effect of unique structural frameworks,coordinative interaction and hydrogen bond.The design for present hybrid composites provides a facile strategy to develop difunctional luminescent adsorbents with the merits of selective detection and effective absorption of dinitroaniline pesticides.展开更多
Concise chemistry leads to a family of heptanuclear Co^(Ⅱ)-clusters,[Co_(7)(N_(3))_(12)(CH_(3)CN)_(12)][Y_(2)(NO_(3))_(4)(piv)_(4)]·2CH_(3)CN(DC1)(pivH=pivalic acid),[Co_(7)(N_(3))_(12)(CH_(3)CN)_(10)(NO_(3))_(0...Concise chemistry leads to a family of heptanuclear Co^(Ⅱ)-clusters,[Co_(7)(N_(3))_(12)(CH_(3)CN)_(12)][Y_(2)(NO_(3))_(4)(piv)_(4)]·2CH_(3)CN(DC1)(pivH=pivalic acid),[Co_(7)(N_(3))_(12)(CH_(3)CN)_(10)(NO_(3))_(0.4)(Cl)_(1.6)]·4CH_(3)CN(DC2)and[Co_(7)(N_(3))_(12)(CH_(3)CN)_(10)(NO_(3))_(2)]·4CH_(3)CN(DC3),in which the metal ions are exclusively bridged by end-on azido ligands to stabilize a beautiful disk-like topology.The resulting clusters exhibit interesting structural transformations and thermodynamically-distinct steady states verified by theoretical calcula-tions.Magnetic studies reveal the first observation of zero-field SMM behaviour in disk-like heptanuclear Co^(Ⅱ)complexes.展开更多
Investigation of luminescent materials with efficient photoluminescence(PL)and mechanoluminescence(ML)is significant for the development of both basic theories and industrial applications for new light sources,pressur...Investigation of luminescent materials with efficient photoluminescence(PL)and mechanoluminescence(ML)is significant for the development of both basic theories and industrial applications for new light sources,pressure sensors,and information security.In this study,we obtain a pair of isomorphic europium(Eu)^(3+)-containing coordination polymers(CPs),namely,[Eu(tfpd)_(3)(phen)]_(n)(1)and[Eu(tfpd)_(3)(bipy)]_(n)(2)(tfpd=4,4,4-trifluoro-4-pyridyl-1,3-diketonate,phen=1,10-phenanthroline,bipy=2,2'-bipyridine),which exhibit novel helical chain-like structures that can be extended to 3D supramolecular networks through moderate interchain interactions.The thermostable CPs simultaneously exhibit strong photoluminescence(PL)emissions with high quantum yields and excellent mechanoluminescence(ML)activity with an unusual anti-thermal quenching effect.Careful analyses of the CP crystal structures and optical performances,coupled with theoretical calculations,demonstrate that the PL emission depends on the asymmetric Eu^(3+)coordination spheres,whereas the ML activity is significantly correlated with molecular packing derived from appropriate interchain H-bonding interactions.As these CPs have highly efficient optical activities,they have promising potential applications in pressure sensing,anti-counterfeiting,and fingerprint recognition technologies.展开更多
基金supported by the National Natural Science Foundation of China(NSFC,Nos.21863009 and 22063008)the Natural Science Foundation of Ningxia(Nos.2023AAC03014,2023AAC03227 and 2022AAC05002)+2 种基金the Young Top-notch Talent Cultivation Program of Ningxiathe Discipline Project of Ningxia(No.NXYLXK2017A04)the China Postdoctoral Science Foundation(No.2022M723148)。
文摘Developing candidate materials that are equipped with the ability of both selective detection and efficient removal of pesticides is greatly desirable for the environment and public health.However,most of reported materials usually possess single function,which considerably limits their applications as sensors or captures.Herein,two fluorescent composites,ZIF-8@Au Ag NPs and ZIF-8-Au Ag NPs,are prepared by the integration of Au/Ag nanoparticles(M NPs)and a zeolite imidazolate framework(ZIF-8),presenting a more stable fluorescent performance compared with pure Au Ag NPs.The characterizations unravel that ZIF-8@Au Ag NPs exhibits a core shell type structure,whereas ZIF-8-Au Ag NPs are indicative of a dispersed loading type motif.ZIF-8-Au Ag NPs features a significant fluorescent quenching effect for three commonly used dinitroaniline pesticides in aqueous matrices.Then,pendimethalin(PDA)is selected as a representative of dinitroaniline pesticides to thoroughly develop the potential applications in the fields of detection and extraction.Impressively,ZIF-8-Au Ag NPs made of ZIF-8 shell embedded with Au Ag NPs can achieve fluorescence sensing for PDA in a low concentration range with the limit of detection(LOD)of 4.2 nmol/L from aqueous solution and agricultural products,attributed to the combination of competition mechanism and electron transfer.Moreover,ZIF-8-Au Ag NPs possesses high adsorption capacity of125 mg/g for PDA at p H 6,depending on the synergistic effect of unique structural frameworks,coordinative interaction and hydrogen bond.The design for present hybrid composites provides a facile strategy to develop difunctional luminescent adsorbents with the merits of selective detection and effective absorption of dinitroaniline pesticides.
基金supported by the National Natural Science Foundation of China(NSFC,Nos.21863009,22063008)the Natural Science Foundation of Ningxia Province(Nos.2023AAC03014,2023AAC03227,2021AAC03136,2021BEB04062)+1 种基金the Young Top-notch Talent Cultivation Program of Ningxia Province,the Discipline Project of Ningxia(No.NXYLXK2017A04)the China Postdoctoral Science Foundation(No.2022M723148).
文摘Concise chemistry leads to a family of heptanuclear Co^(Ⅱ)-clusters,[Co_(7)(N_(3))_(12)(CH_(3)CN)_(12)][Y_(2)(NO_(3))_(4)(piv)_(4)]·2CH_(3)CN(DC1)(pivH=pivalic acid),[Co_(7)(N_(3))_(12)(CH_(3)CN)_(10)(NO_(3))_(0.4)(Cl)_(1.6)]·4CH_(3)CN(DC2)and[Co_(7)(N_(3))_(12)(CH_(3)CN)_(10)(NO_(3))_(2)]·4CH_(3)CN(DC3),in which the metal ions are exclusively bridged by end-on azido ligands to stabilize a beautiful disk-like topology.The resulting clusters exhibit interesting structural transformations and thermodynamically-distinct steady states verified by theoretical calcula-tions.Magnetic studies reveal the first observation of zero-field SMM behaviour in disk-like heptanuclear Co^(Ⅱ)complexes.
基金supported by the National Natural Science Foundation of China(22463010,22063008)the National Natural Science Foundation of China(62275170)+9 种基金the Natural Science Foundation of Ningxia(2023AAC03227,2022AAC05002,2023AAC03183)the Project of Central Government Guides Local Science and Technology Development(2024FRD05053)the Key Research and Development Project of Ningxia(2023BEG03031)the Young Top-notch Talent Cultivation Program of Ningxiathe Discipline Project of Ningxia(NXYLXK2017A04)the support of Key-Area Research and Development Program of Guangdong Province(2024B0101080001)the Guangdong Provincial Science Fund for Distinguished Young Scholars(2022B1515020054)the Scientific Research Foundation as PhaseⅢConstruction of High-level University 2035 Plan(0000050101)the Proof-of-concept Project(000003011313)of Shenzhen Universitythe Medical-Engineering Interdisciplinary Research Foundation of Shenzhen University(2023YG031)。
文摘Investigation of luminescent materials with efficient photoluminescence(PL)and mechanoluminescence(ML)is significant for the development of both basic theories and industrial applications for new light sources,pressure sensors,and information security.In this study,we obtain a pair of isomorphic europium(Eu)^(3+)-containing coordination polymers(CPs),namely,[Eu(tfpd)_(3)(phen)]_(n)(1)and[Eu(tfpd)_(3)(bipy)]_(n)(2)(tfpd=4,4,4-trifluoro-4-pyridyl-1,3-diketonate,phen=1,10-phenanthroline,bipy=2,2'-bipyridine),which exhibit novel helical chain-like structures that can be extended to 3D supramolecular networks through moderate interchain interactions.The thermostable CPs simultaneously exhibit strong photoluminescence(PL)emissions with high quantum yields and excellent mechanoluminescence(ML)activity with an unusual anti-thermal quenching effect.Careful analyses of the CP crystal structures and optical performances,coupled with theoretical calculations,demonstrate that the PL emission depends on the asymmetric Eu^(3+)coordination spheres,whereas the ML activity is significantly correlated with molecular packing derived from appropriate interchain H-bonding interactions.As these CPs have highly efficient optical activities,they have promising potential applications in pressure sensing,anti-counterfeiting,and fingerprint recognition technologies.
