Electronic and spectroscopic properties of tetracationic 5,10,15,20-tetrakis(1-methyl-4-pyridyl)-21H,23H-porphyrin (TMPyP) were investigated in the framework of the density functional theory (DFT). Modeling of implicit solvent, charge effects, and medium acidity were performed and compared with experimental results. Various hybrid exchange correlation functionals in the Kohn-Sham Scheme of the DFT were employed and various porphyrin models were constructed, simulating different environmental conditions. Since porphyrins present several technological applications with a plethora of interacting systems and the optical spectra profiles are often used to characterize these macrocyclic compounds, the study performed here aims to stablish a correct description of the UV-Vis spectrum. These results allowed to reproduce, both qualitatively as well as quantitatively, the Soret band of the TMPyP.

Theoretical UV-Vis spectra of tetracationic porphyrin: effects of environment on electronic spectral properties

The invention provides a dimension regulation method of a porphyrin metal organic framework material. The method comprises the following steps of (1) adopting 1 to 5mL of DMF solution of ZrOCl2.8H2O with the concentration being 2 to 6mg/mL, adding benzoic acid, and uniformly dissolving; (2) adopting 1 to 5mL of DMF solution of tetracarboxyl-phenyl porphyrin with the concentration being 1 to 3mg/mL, wherein the mass ratio of the ZrOCl2.8H2O to the tetracarboxyl-phenyl porphyrin is 2:1; (3) after mixing the solution of the step (1) and the solution of the step (2), adding trifluoroacetic acid, mixing, adding CTAB or SDS, carrying out heating reaction at 100 to 150 DEG C for 0.5 to 1.5h, and postprocessing to obtain the porphyrin metal organic framework material. According to the dimension regulation method of the porphyrin metal organic framework material provided by the invention, the dimension can be controlled within an appropriate range, and a better hydrogen production performance can be achieved.

Dimension regulation method of porphyrin metal organic framework material

The invention provides a method for preparing a gas sensor made of a nanotube material and the gas sensor and belongs to the technical field of sensors. A sensitive element and a compensation elementof the gas sensor each include an Al2O3 carrier and a precious metal modified gamma-Al2O3 nanotube array. A sensitive electrode is arranged on the Al2O3 carrier, a metal lead is welded to the sensitive electrode through an electrode bonding pad, and the precious metal modified gamma-Al2O3 nanotube array is located on the bottom surface of the Al2O3 carrier. The method includes the steps that an in-situ grown Al2O3 film-like ceramic material is used as a sensor carrier material, and a sensor microstructure carrier is formed by a micro-machining technology; after gamma-Al2O3 and a precious metalcatalyst are modified in a hole of the Al2O3 film-like material, a sensitive nanotube array sensitive core body is formed, a platinum film is deposited on the surface of the core body, and the sensitive electrode is formed after photoetching and etching. According to the sensor core body, concentrations of different kinds of flammable and explosive gases can be detected at a high temperature.

Method for preparing gas sensor made of nanotube material and gas sensor

The invention provides a method for fluorescently detecting phosphate based on ratio of composite materials of a metal organic frame. The method is characterized in that an analyte which is phosphateanion is in interaction with zirconium-oxygen node of the composite nanomaterial UiO-66-NH2/RhB of the metal organic frame in order to weaken the electronic transfer (LMCT (ligand-to-metal charge transfer)) process, so that the characteristic variation of fluorescence intensity and fluorescence spectrum of a solution can be shown, and as a result, the phosphate anion can be qualitatively and quantitatively detected. When in detection, the concentration of the phosphate anion can be reflected based on the difference of fluorescence intensity of the solution under a UV lamp, and moreover, the quantitative analyzing can be realized based on the characteristic peak ratio I 430nm/I 585nm of the fluorescence spectrum of the solution. The method is simple and convenient to operate, fast, and highin accuracy and sensitivity.

Method for fluorescently detecting phosphate based on ratio of composite materials of metal organic frame

The invention discloses a nanometer medicine loading system, a method for preparing the same and application of the nanometer medicine loading system, and belongs to the field of nanometer biomedicine. The nanometer medicine loading system, the method and the application have the advantages that a lactic acid protein inhibitor CHC (alpha-cyano-4-hydroxycinnamate) is carried into cells by the aid of porphyrinic zirconium metal organic framework materials for the first time, targeting polymers are coated, the intratumor oxygen consumption can be reduced after the CHC is released, equivalently, the intratumor oxygen concentration is increased, accordingly, the shortcomings of photodynamic cancer therapy in the prior art can be overcome by the aid of the nanometer medicine loading system, andphotodynamic antitumor effects can be greatly improved; the nanometer medicine loading system is excellent in biocompatibility and system safety.

Nanometer medicine loading system, method for preparing same and application of nanometer medicine loading system

The invention discloses application of zirconium-porphyrin metal-organic frameworks (MOFs) as fluorescent probes to the detection of hydrogen phosphate ions The zirconium-porphyrin MOFs are made by making 5,10,15,20-tetra(4-carboxylphenyl)porphyrin, benzoic acid and zirconium oxychloride react through a solvothermal method In comparison with the prior art, according to the application, the zirconium-porphyrin MOFs are used as the fluorescent probes to detect phosphates; not only does the application have the advantages of being simple in method, being quick and being convenient to operate, but also Zr-O nodes in the zirconium-porphyrin MOFs have quite strong affinity interactions with the hydrogen phosphate ions; moreover, the zirconium-porphyrin MOFs have favorable dispersity in an aqueous solution and are easily recovered; thus, the detection on the hydrogen phosphate ions in the aqueous solution is realized

Application of zirconium-porphyrin metal-organic frameworks (MOFs) as fluorescent probes to detection of hydrogen phosphate ions

The invention discloses a porous graphene-gold nanorod modified electrode which comprises a substrate electrode, gold nanorod and porous graphene. The gold nanorod and the porous graphene are adhered on the surface of the substrate electrode. The modified electrode has excellent sensitivity and selectivity and high biocompatibility and can be used for electrochemical enzyme-free detection of hydrogen peroxide.

Porous graphene-gold nanorod modified electrode and preparation method and application thereof

The invention discloses an application of Zn-MOFs to detection of 4-nitrophenol. Zn-MOFs is used as a fluorescence probe, and the fluorescence quenching effect of 4-nitrophenol for Zn-MOFs is used for detecting the 4-nitrophenol. The used Zn-MOFs fluorescence probe is easy to prepare and store, the stability is good, the selectivity for the 4-nitropenol is good, the specificity identification detection of the 4-nitrophenol can be realized, the operation is simple and convenient, and the sensitivity is high.

Application of Zn-MOFs to detection of 4-nitrophenol

The invention discloses an application of a silicon dioxide nanocavity array electrode serving as an ion channel. The silicon dioxide nanocavity array electrode is formed by ITO conductive glass and a SiO2 nanocavity array, holes of which are vertical to the surface of the ITO conductive glass. The SiO2 nanocavity array electrode is utilized to simulate the biomembrane ion channel, so that under different pH conditions, difference of electric charges on the surface of mesoporous SiO2 controls ions to transfer in a confinement environment; and by utilizing the SiO2 nanocavity array electrode as the ion channel, ion transfer dynamic process can be studied better, a liquid/liquid interface ion transfer mechanism can be understood better and potassium ion and sodium ion membrane transfer mechanisms in the life process can be known, and the application of silicon dioxide nanocavity array electrode serving as the ion channel is of great significance to reveal the mysteries of life.

Application of silicon dioxide nanocavity array electrode serving as ion channel

The invention discloses a nickel-doped cobaltosic oxide nanoflower and a preparation method thereof. A form of the nickel-doped cobaltosic oxide naonflower is a flower-shaped structure formed by adopting a great number of nanorods to surround a center, and the length of a nanorod is 500 to 350 nanometers. The Ni-doped Co3O4 nanoflower prepared by the invention is applied to a modified electrode, and has good catalytic performance, low detection limit and wide linear range for glucose; and moreover, the preparation method of the Ni-doped Co3O4 nanoflower is simple in operation.

Nickel-doped cobaltosic oxide nanoflower and preparation method thereof

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