Abstract: The invention provides a composite polymer film material based on a tungsten/copper/sulfur cluster compound, a preparation method and use thereof. The cluster compound has a chemical formula of: [RWS3Cu2(La)]n(M)n, wherein R is tris(3,5-dimethylpyrazolyl)hydroborate, tris(pyrazolyl)hydroborate, or pentamethylcyclopentadienyl; La has a structural formula of: when M is perrhenate, n is 4; and when M is triflate, n is 6. The synthesis process of the cluster compound is simple and controllable. A tetrahedral and an octahedral tungsten/copper/sulfur cluster compound that are good third-order nonlinear optical (NLO) active species are selectively synthesized by using different cuprous salts. Composite polymer films of various layers are prepared by spin coating. Such films, as flexible, portable and easy-to-process solid materials, are applicable to third-order NLO devices.

Abstract: The present invention relates to the field of singlet oxygen technologies, and particularly to a singlet oxygen capturing or releasing material, and a preparation method and use thereof. The singlet oxygen capturing material according to the present invention has a chemical formula of [Cd(BP4VA)(4-NBA)2]n; and the singlet oxygen releasing material has a chemical formula of [Cd(BP4VA-1O2)(4-NBA)2]n, in which BP4VA is 9,10-bis[(cis)-2-(pyridin-4-yl)vinyl]anthracene, 4-NBA is a unit derived by removing a hydrogen ion from 4-nitrobenzoic acid after reaction, and n=3000-50000. The material has simple synthesis steps and high yield, and is capable of being prepared in large quantities. The material is capable of efficiently and rapidly capturing or releasing singlet oxygen. The singlet oxygen capturing material is also useful as a fluorescence sensor for detecting oxygen, with the advantages of simple operation, high selectivity, high sensitivity, and good recyclability and good stability.

Abstract: The present invention relates to the technical field of nano-materials, and specifically provides a method for preparing multiphase heterojunction nanomaterials. The method comprises the following steps: providing a substrate loaded with a NiMoO4 precursor; dissolving a selenium powder in hydrazine hydrate, adding water or sodium molybdate aqueous solution, then adding the substrate loaded with a NiMoO4 precursor, and reacting at 180-200° C.; and after the reaction, obtaining the multiphase heterojunction nanomaterials. The present invention also provides a tetraphase heterojunction nanomaterial 1T/2H-MoSe2—H/R—NiSe, and a triphase heterojunction nanomaterial 1T/2H-MoSe2—H—NiSe prepared by the method, and use thereof as an electrocatalyst to catalyze a hydrogen evolution reaction under an alkaline condition.

Abstract: The invention provides a light-stimuli responsive coordination polymer, and preparation method and use thereof. The coordination polymer has a chemical formula of [Zn(tkpvb) (Fb)2]n1, wherein Fb represents p-fluorobenzoate, tkpvb represents 1,2,4,5-tetrakis((E)-2-(4-pyridyl)vinyl)benzene, and n=3000-60000; and crystallographic parameters of: (1) crystal system: monoclinic system; (2) space group: C2/c; (3) a=28.577(3)?, b=7.4084(6) ?, c=22.612(3) ?, ?=126.771(2)°, and V=3834.8(7) ?3; (4) Z=4; and (5) F(000)=1720, R1=0.0440, wR2=0.1042, and GOF=1.047. The method is simple, and has mild reaction conditions, and fast light conversion rate. The means of light-stimuli responsiveness are non-contact and non-damage type, the volume adjustment is highly accurate, and the whole adjustment process does not require any chemical reagents, and is safe and reliable. Photoactuators can complete a variety of behaviors under the irradiation of ultraviolet light having a wavelength of 365 nm.

Abstract: The invention provides a light-stimuli responsive coordination polymer, and preparation method and use thereof. The coordination polymer has a chemical formula of [Zn(tkpvb) (Fb)2]n1, wherein Fb represents p-fluorobenzoate, tkpvb represents 1,2,4,5-tetrakis((E)-2-(4-pyridyl)vinyl)benzene, and n=3000-60000; and crystallographic parameters of: (1) crystal system: monoclinic system; (2) space group: C2/c; (3) ?=28.577(3)?, b=7.4084(6) ?, c=22.612(3) ?, ?=126.771(2°), and V=3834.8(7) ?3; (4) Z=4; and (5) F(000)=1720, R1=0.0440, wR2=0.1042, and GOF=1.047. The method is simple, and has mild reaction conditions, and fast light conversion rate. The means of light-stimuli responsiveness are non-contact and non-damage type, the volume adjustment is highly accurate, and the whole adjustment process does not require any chemical reagents, and is safe and reliable. Photoactuators can complete a variety of behaviors under the irradiation of ultraviolet light having a wavelength of 365 nm.

Abstract: The present invention discloses a fluorescent chromic material having a chemical formula of [PPy3Cu2I2]n, wherein PPy3 is tripyridylphosphine. The present invention also provides a method for preparing the fluorescent chromic material, and the use of the fluorescent chromic material in the detection of dichloromethane vapor. The fluorescent chromic material of the present invention has simple synthesis steps, high yield, and capability of large production; and can be used as a fluorescent probe for detecting dichloromethane vapor. It has the advantages of simple operation, high selectivity, high sensitivity, good cycle performance and good stability.

Abstract: The invention discloses a method for preparing a Fe-doped MoS2 nano-material, which comprises the following steps: dissolving a ferric salt and ammonium tetrathiomolybdate in DMF and reacting at 180-200° C. for 6-24 hrs to obtain a Fe-doped MoS2 nano-material. The present invention also provides a Fe-doped MoS2 nano-material supported by nickel foam, which includes a nickel foam substrate and the Fe-doped MoS2 nano-material loaded on the nickel foam substrate. Furthermore, the present invention also provides a preparation method and use of the above materials. In the invention, the desired product can be obtained by a one-pot solvothermal reaction, and thus the operation is simple. There is no need to introduce a surfactant for morphological control during the preparation process, and the resulting product has a clean surface and is easy to wash.

Abstract: The invention provides a photoinduced-nonlinear-expansion coordination polymer and preparation method thereof. The coordination polymer has a chemical formula of [Zn(iba)(tkpvb)Cl]n1, wherein iba represents p-iodobenzoate, tkpvb represents 1,2,4,5-tetrakis((E)-2-(4-pyridyl)vinyl)benzene, and n=3000-60000; and crystallographic parameters of: (1) crystal system: monoclinic system; (2) space group: Cc; (3) a = 28.6156(16) Å, b = 7.2901(4) Å, c = 21.5157(13) Å, ? = 127.430(4)°, and V = 3574.2(4) Å3; (4) Z = 4; and (5) F(000) = 1680, R1 = 0.1363, wR2 = 0.3788, and GOF = 1.620; wherein iba represents p-iodobenzoate, tkpvb represents 1,2,4,5-tetrakis((E)-2-(4-pyridyl)vinyl)benzene, and n1=3000-60000. The preparation method of the coordination polymer of the present invention is simple, and has mild reaction conditions, and fast light conversion rate.

Abstract: The present invention discloses a method for preparing an ultra-thin Ni—Fe-MOF nanosheet, which comprises the steps of dissolving an organic ligand in an organic solvent, dripping the resulting solution to an aqueous solution containing a nickel salt and an iron salt, mixing uniformly and reacting at 140-160° C. for 3-6 h to obtain the ultra-thin Ni—Fe-MOF nanosheet, wherein the organic ligand is terephthalic acid and/or disodium terephthalate, and the organic solvent is N,N-dimethylacetamide and/or N,N-dimethylformamide. The present invention discloses an ultra-thin Ni—Fe-MOF nanosheet, and use thereof. The preparation method does not require a surfactant, the surface of the product is neat and easy to be cleaned, and the large-scale synthesis of 2D ultra-thin MOF materials can be realized.

Abstract: The present invention discloses a fluorescent chromic material having a chemical formula of [PPy3Cu2I2]n, wherein PPy3 is tripyridylphosphine. The present invention also provides a method for preparing the fluorescent chromic material, and the use of the fluorescent chromic material in the detection of dichloromethane vapor. The fluorescent chromic material of the present invention has simple synthesis steps, high yield, and capability of large production; and can be used as a fluorescent probe for detecting dichloromethane vapor. It has the advantages of simple operation, high selectivity, high sensitivity, good cycle performance and good stability.

Abstract: The present invention discloses a method for preparing an ultra-thin Ni—Fe-MOF nanosheet, which comprises the steps of dissolving an organic ligand in an organic solvent, dripping the resulting solution to an aqueous solution containing a nickel salt and an iron salt, mixing uniformly and reacting at 140-160° C. for 3-6 h to obtain the ultra-thin Ni—Fe-MOF nanosheet, wherein the organic ligand is terephthalic acid and/or disodium terephthalate, and the organic solvent is N,N-dimethylacetamide and/or N,N-dimethylformamide. The present invention discloses an ultra-thin Ni—Fe-MOF nanosheet, and use thereof. The preparation method does not require a surfactant, the surface of the product is neat and easy to be cleaned, and the large-scale synthesis of 2D ultra-thin MOF materials can be realized.

Abstract: The invention discloses a method for preparing a Fe-doped MoS2 nano-material, which comprises the following steps: dissolving a ferric salt and ammonium tetrathiomolybdate in DMF and reacting at 180-200° C. for 6-24 hrs to obtain a Fe-doped MoS2 nano-material. The present invention also provides a Fe-doped MoS2 nano-material supported by nickel foam, which includes a nickel foam substrate and the Fe-doped MoS2 nano-material loaded on the nickel foam substrate. Furthermore, the present invention also provides a preparation method and use of the above materials. In the invention, the desired product can be obtained by a one-pot solvothermal reaction, and thus the operation is simple. There is no need to introduce a surfactant for morphological control during the preparation process, and the resulting product has a clean surface and is easy to wash.