Continental epithermal ore deposits are commonly associated with sedimentary organic matter,oils or solid bitumen.These organics embedded in mineral deposits can convey valuable information of the ore genesis.However,...Continental epithermal ore deposits are commonly associated with sedimentary organic matter,oils or solid bitumen.These organics embedded in mineral deposits can convey valuable information of the ore genesis.However,the extent to which the formation of ore minerals was recorded by organic compounds remains largely unknown,as also is how metal-rich ores interfere with the molecular proxies in the temperature regime envisaged for hydrothermal activity.The molecular compositional changes of various polycyclic aromatic steranes and polycyclic aromatic hydrocarbons and compounds derived from the Jinding Pb/Zn deposit,SW China provide new data.Aliphatic regular steranes are present as traces.The transformation from polycyclic aromatic steranes to unsubstituted polycyclic aromatic hydrocarbons is observed to show an increased trend with increasing hydrothermal alteration levels;this is consistent with the transformation from unsubstituted polycyclic aromatic hydrocarbons to heterocyclic compounds.Dehydrocyclization(aromatization)of polycyclic biological compounds and hydrodecyclization(dearomatization)of polycyclic aromatic compounds are two important reaction pathways in hydrothermal systems with moderate temperature.This detailed investigation of organicinorganic interactions of two groups of polycyclic compounds with metal-rich ores provides insights into the questions on how and to what extent the formation of Pb/Zn deposits can be recorded by organics.This work will improve our understanding of carbon reduction,oxidation or condensation in the deep Earth and the carbon exchange between the Earth's crust and mantle,and may shed light on the processes for ultra-deep hydrocarbon exploration.展开更多
The effect of different concentrations of natural macromolecular compound on the characteristics of nutrient release in the membrane materials of organic-inorganic compound film-coated urea was discussed, and the opti...The effect of different concentrations of natural macromolecular compound on the characteristics of nutrient release in the membrane materials of organic-inorganic compound film-coated urea was discussed, and the optimal concentrations for better nutrient release was proposed. The characteristics of nutrient release of film-coated urea were evaluated by soil column leaching experiment. Organic-inorganic compound film-coated urea showed good characteristics of nutrient release, which could be well simulated by Logistic curve. The two parameters in this curve, a and r, can be used to present nutrient release of film-coated urea, and followed the order of B 〉 C 〉 A and C 〈 B 〈 A, respectively, indicating that the release was stronger with the increasing concentration of natural macromolecular compound in the membrane, which implied better controllability of nutrient release. The concentration of 5% of natural macromolecular compound showed better characteristic of nutrient release and can be utilized as a membrane material combined with inorganic mineral powders to develop film-coated slow-release fertilizer.展开更多
Objective: Prepare cross-linked HA gels with higher mechanical stability, lower degradation velocity and desirable biocompatibility,so as to extend the usage of HA.Method:1.Test molecular weight of HA (Mr_ HA ) by vis...Objective: Prepare cross-linked HA gels with higher mechanical stability, lower degradation velocity and desirable biocompatibility,so as to extend the usage of HA.Method:1.Test molecular weight of HA (Mr_ HA ) by viscosimetry;2.prepare cross-linked HA gels by DVS, GTA, DEC;3.discuss the cross-linking and degradation procedure;4.evaluate the biocompatibility of the best HA gels. Results:The mechanical stability and durability to degradation of HA-DVS gels are superior to those of other gels, and when HA:DVS = 40:1(g/g), at 35℃ and in 0.2 M NaOH solution, the HA-DVS gel shows the best mechanical stability, and its cytotoxicity reaches class I, hemolysis ratio is lower than 5%. Conclusion:Our HA-DVS gel can be used to prepare biologic scaffolds.展开更多
A new compound,[Co(dien)2](dienH3)(H3O)7[P2Mo5O23]2·14H2O, has been hydrothermallly synthesized by using Na2MoO4,CoCl2, H3PO4 and dien, and structurally characterized by elemental analysis, X-ray powder dif...A new compound,[Co(dien)2](dienH3)(H3O)7[P2Mo5O23]2·14H2O, has been hydrothermallly synthesized by using Na2MoO4,CoCl2, H3PO4 and dien, and structurally characterized by elemental analysis, X-ray powder diffraction analysis, SEM, IR and TG analysis. The results show that the compound is composed of a polyanion [P2Mo5O23]2^12, complex [Co(dien)2]^2+ cation, protonated [dienH3]^3+ , and forteen crystallization water molecule.展开更多
Multifunctional switchable materials are attracting tremendous interest because of their great application potential in signal processing,information encryption,and smart devices.Here,we reported an organic-inorganic ...Multifunctional switchable materials are attracting tremendous interest because of their great application potential in signal processing,information encryption,and smart devices.Here,we reported an organic-inorganic hybrid thermochromic ferroelastic crystal,[TMIm][CuCl_(4)](TMIm=1,1,3,3-tetramethylimidazolidinium),which undergoes two reversible phase transitions at 333 K and 419 K,respectively.Intriguingly,these three phases experience a remarkable ferroelastic-paraelastic-ferroelastic(2/m-mmm-2/m)transition,which remains relatively unexplored in ferroelastics.Moreover,the ferroelastic domains can be simultaneously switched under temperature and stress stimuli.Meanwhile,[TMIm][CuCl_(4)]exhibits thermochromic phenomenon,endowing it with extra spectral encryption possibilities during information processing.Combined with dielectric switching behavior,[TMIm][Cu Cl_(4)]are promising for practical applications in memory devices,next-generation sensors,and encryption technology.展开更多
A novel organic-inorganic hybrid compound {[Cu(2,2'-bpy)_2]_2Mo_8O_(26)} hasbeen hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction.The compound crystallizes in the ortho...A novel organic-inorganic hybrid compound {[Cu(2,2'-bpy)_2]_2Mo_8O_(26)} hasbeen hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction.The compound crystallizes in the orthorhombic space group, Pna2_1, with a = 2.4164(5), b =1.8281(4), c = 1.1877(2) nm, V = 5.247(2) nm^3, Z = 4, and final R_1 = 0.0331, wR_2 = 0.0727. Thestructure consists of discrete {[Cu(2,2'-bpy)_2]_2Mo_8O_(26)} clusters, constructed from aβ-octamolybdate subunit [Mo_8O_(26)]^(4-) covalently bonded to two [Cu(2,2'-bpy)_2]^(2+)coordination complex cations via bridging oxo groups. In addition, the spectroscopic properties andthermal behavior of this compound have been investigated by spectroscopic techniques (UV-vis, IR,Raman and EPR spectra) and TG analysis.展开更多
Three new Keggin polyoxometalates, [Zn(phen)3]2[SiW12O40]'5H2O(1), [Co(phen)3]2[SiW12O40](2) and [Ni(phen)3]2[SiW12O40].2H2O(3)(phen=1,10'-phenanthroline) have been hydrothermally synthesized and chara...Three new Keggin polyoxometalates, [Zn(phen)3]2[SiW12O40]'5H2O(1), [Co(phen)3]2[SiW12O40](2) and [Ni(phen)3]2[SiW12O40].2H2O(3)(phen=1,10'-phenanthroline) have been hydrothermally synthesized and characterized by elemental analysis, IR, crystal X-ray diffraction, thermogravimetric analyses(TGA) and fluorescence tech- niques. Complex 1, crystallized in the triclinic space group Pi, consists of one [SiW12O40]4 anion, two discrete [Zn(phen)3]^2+ cations and five crystal water molecules. Complexes 2 and 3 have the similar configuration to complex 1, but they crystallized in the monoclinic space group C2/c. Variable-temperature magnetic susceptibilities of complexess 2 and 3 reveal antiferromagnetism and ferromagnetism, respectively.展开更多
The organic-inorganic hybrid halide compounds have emerged as one of the most promising photoelectric material for their superior optoelectronic properties and hold great prospects for renewable energy substitutes and...The organic-inorganic hybrid halide compounds have emerged as one of the most promising photoelectric material for their superior optoelectronic properties and hold great prospects for renewable energy substitutes and environmental protection as photocatalysis.Here,we report the optical properties of the Sb-based organic-inorganic hybrid ferroelectric materials:pyridine-4-aminium tetrachloroantimonate((C_(5)H_(7)N_(2))SbCl_(4),sample 1),piperidin-1-aminium tetrachloroantimonate((C_(5)H_(13)N_(2))SbCl_(4),sample 2)and tris(trimethylammonium)nonachlorodiantimonate(((CH_(3))_(3)NH)_(3)Sb_(2)Cl_(9),sample 3),which are a kind of exploited efficient photocatalysts.Samples 2 and 3 exhibit distinct photoelectric respond,which are mainly ascribed to their minor narrow band-gap compared with sample 1.For the ferroelectrics,the intrinsic of spontaneous polarization of sample 3 at room temperature is favourable for the separation of photogenerated electrons and holes within the photorespond process.Moreover,sample 3 shows the highest efficiency of photo-decomposed Rhodamine B(90.2%within 80 min)and Methyl Orange(MO)(97.4%within 50 min),thanks to the photo-excited electrons and holes promoting the formation of oxidative radical species during the photo-redox progress.These findings prove that the development of a novel Sbbased organic-inorganic hybrid halide compounds with good stability in the degradation of organic dyes paves a way to designing new photocatalyst.展开更多
Layered hydroxide metal acetate Co2(OH)3(CH3COO)·H2O with an interlayer spacing of 1.282 nm has been synthesized by a novel method which is employed in ethanol-aqueous mixed solvents media. Experiment results...Layered hydroxide metal acetate Co2(OH)3(CH3COO)·H2O with an interlayer spacing of 1.282 nm has been synthesized by a novel method which is employed in ethanol-aqueous mixed solvents media. Experiment results show that the purity of the product by the modified method is higher compared with that by the previous methods. A complete characterization of the as-prepared samples was performed by means of X-ray powder diffraction, IR spectroscopy, scanning electron microscope, as well as magnetic measurement. The facile and effective approach for the preparation of this compound in this study is very interesting and important because it has wide application in the field of anionic exchange reaction for the synthesis of hybrid organic-inorganic compounds.展开更多
Polyacrylonitrile preoxided fibre PANOF is an intermediate in carbon fibre preparation. Thequality of PANOF is closely related to the property and structure of carbon fibre. In this paper, thermal mechanical analysis(...Polyacrylonitrile preoxided fibre PANOF is an intermediate in carbon fibre preparation. Thequality of PANOF is closely related to the property and structure of carbon fibre. In this paper, thermal mechanical analysis(TMA), thermogravimetric analysis(TGA), swell-ing differential scanning calorimetry(SDSC)and X-ray photoelectron spectroscopy(XPS)wereused to study the increase in tenacity of PANOF from the precursor treated with cuprous salt It has been discovered that the cuprous salt reacts strongly with the uncyclized CN of PANOF,resulting in an increase in the tenacity of PANOF by 30%. The results shwo that the cause of thistenacity improvement is the formation of coordinated complex. Cu^+is the central ion, and PANOFthe ligand. It is due to the coordinate bond that the network structure is formed from uncyclizedCN of PANOF. Therefore the tenacity of PANOF is remarkably increased.展开更多
基金financially supported by the National Key Research and Development Program of China(Grant No.2019YFA0708504)National Natural Science Foundation of China(Grant Nos.U20B6001,42141021,42102185)。
文摘Continental epithermal ore deposits are commonly associated with sedimentary organic matter,oils or solid bitumen.These organics embedded in mineral deposits can convey valuable information of the ore genesis.However,the extent to which the formation of ore minerals was recorded by organic compounds remains largely unknown,as also is how metal-rich ores interfere with the molecular proxies in the temperature regime envisaged for hydrothermal activity.The molecular compositional changes of various polycyclic aromatic steranes and polycyclic aromatic hydrocarbons and compounds derived from the Jinding Pb/Zn deposit,SW China provide new data.Aliphatic regular steranes are present as traces.The transformation from polycyclic aromatic steranes to unsubstituted polycyclic aromatic hydrocarbons is observed to show an increased trend with increasing hydrothermal alteration levels;this is consistent with the transformation from unsubstituted polycyclic aromatic hydrocarbons to heterocyclic compounds.Dehydrocyclization(aromatization)of polycyclic biological compounds and hydrodecyclization(dearomatization)of polycyclic aromatic compounds are two important reaction pathways in hydrothermal systems with moderate temperature.This detailed investigation of organicinorganic interactions of two groups of polycyclic compounds with metal-rich ores provides insights into the questions on how and to what extent the formation of Pb/Zn deposits can be recorded by organics.This work will improve our understanding of carbon reduction,oxidation or condensation in the deep Earth and the carbon exchange between the Earth's crust and mantle,and may shed light on the processes for ultra-deep hydrocarbon exploration.
基金supported by a key project of Liaoning Province (2006215005)China Ministry of Education (209032)
文摘The effect of different concentrations of natural macromolecular compound on the characteristics of nutrient release in the membrane materials of organic-inorganic compound film-coated urea was discussed, and the optimal concentrations for better nutrient release was proposed. The characteristics of nutrient release of film-coated urea were evaluated by soil column leaching experiment. Organic-inorganic compound film-coated urea showed good characteristics of nutrient release, which could be well simulated by Logistic curve. The two parameters in this curve, a and r, can be used to present nutrient release of film-coated urea, and followed the order of B 〉 C 〉 A and C 〈 B 〈 A, respectively, indicating that the release was stronger with the increasing concentration of natural macromolecular compound in the membrane, which implied better controllability of nutrient release. The concentration of 5% of natural macromolecular compound showed better characteristic of nutrient release and can be utilized as a membrane material combined with inorganic mineral powders to develop film-coated slow-release fertilizer.
基金The Second Hospital of Tianjin Medical University,300211 Tianjin,China
文摘Objective: Prepare cross-linked HA gels with higher mechanical stability, lower degradation velocity and desirable biocompatibility,so as to extend the usage of HA.Method:1.Test molecular weight of HA (Mr_ HA ) by viscosimetry;2.prepare cross-linked HA gels by DVS, GTA, DEC;3.discuss the cross-linking and degradation procedure;4.evaluate the biocompatibility of the best HA gels. Results:The mechanical stability and durability to degradation of HA-DVS gels are superior to those of other gels, and when HA:DVS = 40:1(g/g), at 35℃ and in 0.2 M NaOH solution, the HA-DVS gel shows the best mechanical stability, and its cytotoxicity reaches class I, hemolysis ratio is lower than 5%. Conclusion:Our HA-DVS gel can be used to prepare biologic scaffolds.
基金Funded by the Natural Science Foundation of Hubei Province (No. 2003ABA085) Key Laboratory for Silicate Materials Science and Engineering (Wuhan University of Technology), Ministry of Education (No.2003-SJSJJ-15)
文摘A new compound,[Co(dien)2](dienH3)(H3O)7[P2Mo5O23]2·14H2O, has been hydrothermallly synthesized by using Na2MoO4,CoCl2, H3PO4 and dien, and structurally characterized by elemental analysis, X-ray powder diffraction analysis, SEM, IR and TG analysis. The results show that the compound is composed of a polyanion [P2Mo5O23]2^12, complex [Co(dien)2]^2+ cation, protonated [dienH3]^3+ , and forteen crystallization water molecule.
基金supported by the National Natural Science Foundation of China(Nos.21975114,11904151 and 22105094)。
文摘Multifunctional switchable materials are attracting tremendous interest because of their great application potential in signal processing,information encryption,and smart devices.Here,we reported an organic-inorganic hybrid thermochromic ferroelastic crystal,[TMIm][CuCl_(4)](TMIm=1,1,3,3-tetramethylimidazolidinium),which undergoes two reversible phase transitions at 333 K and 419 K,respectively.Intriguingly,these three phases experience a remarkable ferroelastic-paraelastic-ferroelastic(2/m-mmm-2/m)transition,which remains relatively unexplored in ferroelastics.Moreover,the ferroelastic domains can be simultaneously switched under temperature and stress stimuli.Meanwhile,[TMIm][CuCl_(4)]exhibits thermochromic phenomenon,endowing it with extra spectral encryption possibilities during information processing.Combined with dielectric switching behavior,[TMIm][Cu Cl_(4)]are promising for practical applications in memory devices,next-generation sensors,and encryption technology.
基金theNationalNaturalScienceFoundationofChina (No .2 0 0 710 0 7)andtheFoundationforUniversityKeyTeacherbytheMinistryofEducationofChina
文摘A novel organic-inorganic hybrid compound {[Cu(2,2'-bpy)_2]_2Mo_8O_(26)} hasbeen hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction.The compound crystallizes in the orthorhombic space group, Pna2_1, with a = 2.4164(5), b =1.8281(4), c = 1.1877(2) nm, V = 5.247(2) nm^3, Z = 4, and final R_1 = 0.0331, wR_2 = 0.0727. Thestructure consists of discrete {[Cu(2,2'-bpy)_2]_2Mo_8O_(26)} clusters, constructed from aβ-octamolybdate subunit [Mo_8O_(26)]^(4-) covalently bonded to two [Cu(2,2'-bpy)_2]^(2+)coordination complex cations via bridging oxo groups. In addition, the spectroscopic properties andthermal behavior of this compound have been investigated by spectroscopic techniques (UV-vis, IR,Raman and EPR spectra) and TG analysis.
基金Supported by the National Natural Science Foundation of China(Nos.20771013, 20476011 and 20371007)
文摘Three new Keggin polyoxometalates, [Zn(phen)3]2[SiW12O40]'5H2O(1), [Co(phen)3]2[SiW12O40](2) and [Ni(phen)3]2[SiW12O40].2H2O(3)(phen=1,10'-phenanthroline) have been hydrothermally synthesized and characterized by elemental analysis, IR, crystal X-ray diffraction, thermogravimetric analyses(TGA) and fluorescence tech- niques. Complex 1, crystallized in the triclinic space group Pi, consists of one [SiW12O40]4 anion, two discrete [Zn(phen)3]^2+ cations and five crystal water molecules. Complexes 2 and 3 have the similar configuration to complex 1, but they crystallized in the monoclinic space group C2/c. Variable-temperature magnetic susceptibilities of complexess 2 and 3 reveal antiferromagnetism and ferromagnetism, respectively.
基金supported by the National Natural Science Foundations of China(Nos.11874200 and 11574138)the TopNotch Young Talents Program of China,the National Key R&D Program of China(No.2016YFA0201104)+1 种基金Dengfeng Project B of Nanjing UniversityOpen Fund of Key Laboratory for Intelligent Nano Materials and Devices of the Ministry of Education(No.INMD-2020M06)。
文摘The organic-inorganic hybrid halide compounds have emerged as one of the most promising photoelectric material for their superior optoelectronic properties and hold great prospects for renewable energy substitutes and environmental protection as photocatalysis.Here,we report the optical properties of the Sb-based organic-inorganic hybrid ferroelectric materials:pyridine-4-aminium tetrachloroantimonate((C_(5)H_(7)N_(2))SbCl_(4),sample 1),piperidin-1-aminium tetrachloroantimonate((C_(5)H_(13)N_(2))SbCl_(4),sample 2)and tris(trimethylammonium)nonachlorodiantimonate(((CH_(3))_(3)NH)_(3)Sb_(2)Cl_(9),sample 3),which are a kind of exploited efficient photocatalysts.Samples 2 and 3 exhibit distinct photoelectric respond,which are mainly ascribed to their minor narrow band-gap compared with sample 1.For the ferroelectrics,the intrinsic of spontaneous polarization of sample 3 at room temperature is favourable for the separation of photogenerated electrons and holes within the photorespond process.Moreover,sample 3 shows the highest efficiency of photo-decomposed Rhodamine B(90.2%within 80 min)and Methyl Orange(MO)(97.4%within 50 min),thanks to the photo-excited electrons and holes promoting the formation of oxidative radical species during the photo-redox progress.These findings prove that the development of a novel Sbbased organic-inorganic hybrid halide compounds with good stability in the degradation of organic dyes paves a way to designing new photocatalyst.
基金Supported by the President Fund of Xi'an Technological University,China(No.XAGDXJJ1009)
文摘Layered hydroxide metal acetate Co2(OH)3(CH3COO)·H2O with an interlayer spacing of 1.282 nm has been synthesized by a novel method which is employed in ethanol-aqueous mixed solvents media. Experiment results show that the purity of the product by the modified method is higher compared with that by the previous methods. A complete characterization of the as-prepared samples was performed by means of X-ray powder diffraction, IR spectroscopy, scanning electron microscope, as well as magnetic measurement. The facile and effective approach for the preparation of this compound in this study is very interesting and important because it has wide application in the field of anionic exchange reaction for the synthesis of hybrid organic-inorganic compounds.
文摘Polyacrylonitrile preoxided fibre PANOF is an intermediate in carbon fibre preparation. Thequality of PANOF is closely related to the property and structure of carbon fibre. In this paper, thermal mechanical analysis(TMA), thermogravimetric analysis(TGA), swell-ing differential scanning calorimetry(SDSC)and X-ray photoelectron spectroscopy(XPS)wereused to study the increase in tenacity of PANOF from the precursor treated with cuprous salt It has been discovered that the cuprous salt reacts strongly with the uncyclized CN of PANOF,resulting in an increase in the tenacity of PANOF by 30%. The results shwo that the cause of thistenacity improvement is the formation of coordinated complex. Cu^+is the central ion, and PANOFthe ligand. It is due to the coordinate bond that the network structure is formed from uncyclizedCN of PANOF. Therefore the tenacity of PANOF is remarkably increased.