The disclosure provides a magnetic reagent comprised of a recombinant yeast cell having the following genetic modifications: impairment of the CCC1 gene; addition of at least one copy of a human ferritin gene complex; addition of at least one copy of a TCO89 gene; and addition of at least one copy of a mineral- or metal ion-adsorbing target peptide, wherein the magnetic susceptibility or mass magnetization of said magnetic reagent is greater than it would be for a native yeast.

The present invention provides a POSS-containing in-situ composite nanogel with magnetic responsiveness and the method for preparing the same, wherein POSS-containing macromolecule capable of polymerizing and metal-coordination complexing is synthesized to complex with iron salt, Fe.sup.2+/Fe.sup.3+ salts are in-situ deposited via chemical coprecipitation, and crosslinking agent and initiator are added to induce polymerization so that POSS-containing nanogel ranges with magnetic responsiveness is obtained. The present invention is of professional design, feasible technique and simple operation, and prepared nanogel magnetic particles are well dispersed with excellent magnetic responsiveness, which possesses a good application prospect in medical diagnosis, sensor, catalyst carrier and biomaterial.

The present invention provides a POSS-containing in-situ composite nanogel with magnetic responsiveness and the method for preparing the same, wherein POSS-containing macromolecule capable of polymerizing and metal-coordination complexing is synthesized to complex with iron salt, Fe.sup.2+/Fe.sup.3+ salts are in-situ deposited via chemical coprecipitation, and crosslinking agent and initiator are added to induce polymerization so that POSS-containing nanogel ranges with magnetic responsiveness is obtained. The present invention is of professional design, feasible technique and simple operation, and prepared nanogel magnetic particles are well dispersed with excellent magnetic responsiveness, which possesses a good application prospect in medical diagnosis, sensor, catalyst carrier and biomaterial.

This invention describes the preparation and its application of a cyanide bridged metal organic compound with intramolecular magnetic transition. The general structural formula of the compound is [(L2)(L1)M1(NC)M2(L3).sub.m(CN)M1(L1)(L2)](PF.sub.6).sub.6, n=2, 3, or 4. Damagnetic cyanidometal-bridge polynuclear compound [(L2)(L1)M1(NC)M(L)m(CN)M1(L1)(L2)](PF.sub.6).sub.2 is synthesized by compound M(L1)(L2)X (X=Cl, Br or I) with redox activity is selected as the terminal group fragment, and M(L).sub.2(CN).sub.2 is selected as the central bridging ligand, using solution. Carry out electrochemical research on compound [(L2)(L1)M1(NC)M(L)m(CN)M1(L1)(L2)](PF.sub.6).sub.2, select the appropriate oxidant, and obtain the one-electron oxidation product [(L2)(L1)M1(NC) M(L).sub.m(CN)M1(L1)(L2)](PF.sub.6).sub.3 and two-electron oxidation product [(L2)(L1)M1(NC)M(L).sub.m(CN)M1(L1)(L2)](PF.sub.6).sub.4. The cyanide-bridged metal organic compound is a cyanide bridged polynuclear compound that bridges by two diamagnetic metal fragments through a cyano group on a paramagnetic ion. According to its electrochemical and magnetic properties, it can be used for molecular-based magnetic materials. The preparation method is simple and the process conditions are easy to control.

This invention describes the preparation and its application of a cyanide bridged metal organic compound with intramolecular magnetic transition. The general structural formula of the compound is [(L2)(L1)M1(NC)M2(L3).sub.m(CN)M1(L1)(L2)](PF.sub.6).sub.6, n=2, 3, or 4. Damagnetic cyanidometal-bridge polynuclear compound [(L2)(L1)M1(NC)M(L)m(CN)M1(L1)(L2)](PF.sub.6).sub.2 is synthesized by compound M(L1)(L2)X (X=Cl, Br or I) with redox activity is selected as the terminal group fragment, and M(L).sub.2(CN).sub.2 is selected as the central bridging ligand, using solution. Carry out electrochemical research on compound [(L2)(L1)M1(NC)M(L)m(CN)M1(L1)(L2)](PF.sub.6).sub.2, select the appropriate oxidant, and obtain the one-electron oxidation product [(L2)(L1)M1(NC) M(L).sub.m(CN)M1(L1)(L2)](PF.sub.6).sub.3 and two-electron oxidation product [(L2)(L1)M1(NC)M(L).sub.m(CN)M1(L1)(L2)](PF.sub.6).sub.4. The cyanide-bridged metal organic compound is a cyanide bridged polynuclear compound that bridges by two diamagnetic metal fragments through a cyano group on a paramagnetic ion. According to its electrochemical and magnetic properties, it can be used for molecular-based magnetic materials. The preparation method is simple and the process conditions are easy to control.

Photosensitive molecular switch, having a chelate ligand, a metal ion bonded coordinatively to the chelate ligand, the metal ion being selected from the group of metal ions consisting of Mn.sup.2+, Mn.sup.3+, Fe.sup.2+, Fe.sup.3+, Co.sup.2+ and Ni.sup.2+, a photochromic system which is bonded covalently to the chelate ligand and can be isomerized by irradiation, this system being bonded coordinatively to the metal ion in one configuration and not bonded to the metal ion in the other configuration.

Photosensitive molecular switch, having a chelate ligand, a metal ion bonded coordinatively to the chelate ligand, the metal ion being selected from the group of metal ions consisting of Mn.sup.2+, Mn.sup.3+, Fe.sup.2+, Fe.sup.3+, Co.sup.2+ and Ni.sup.2+, a photochromic system which is bonded covalently to the chelate ligand and can be isomerized by irradiation, this system being bonded coordinatively to the metal ion in one configuration and not bonded to the metal ion in the other configuration.

[object] A magnetization technique that enhances magnetic properties of an organic compound is provided without damaging properties of the organic compound or while maintaining the structure of the organic compound. [solution] The present disclosure is a method for manufacturing a magnetic substance composed of crystals of a magnetization target compound and an electron acceptor by combining the magnetization target compound with the electron acceptor; forming a solution by dissolving a mixture of the magnetization target compound and the electron acceptor in a solvent; maintaining the solution in a very low temperature state and allowing the solution to deposit the crystals of the magnetic target compound and the electron acceptor; and separating the crystals from the solvent.

[object] A magnetization technique that enhances magnetic properties of an organic compound is provided without damaging properties of the organic compound or while maintaining the structure of the organic compound. [solution] The present disclosure is a method for manufacturing a magnetic substance composed of crystals of a magnetization target compound and an electron acceptor by combining the magnetization target compound with the electron acceptor; forming a solution by dissolving a mixture of the magnetization target compound and the electron acceptor in a solvent; maintaining the solution in a very low temperature state and allowing the solution to deposit the crystals of the magnetic target compound and the electron acceptor; and separating the crystals from the solvent.

A nanohybrid includes: reduced graphene oxide (rGO); zinc ferrite (ZnFe.sub.2O.sub.4) nanoparticles dispersed in the rGO; and manganese dioxide (MnO.sub.2) nanoflakes three-dimensionally attached on the rGO. The nanohybrid reduces recombination of graphene through the synergistic effects of MnO.sub.2 nanoflakes, ZnFe.sub.2O.sub.4 nanoparticles, and graphene, and increases the surface area of the catalyst, thus being capable of exhibiting higher catalytic activity than the conventional δ-MnO.sub.2@ZnFe.sub.2O.sub.4, γ-MnO.sub.2@rGO, and ZnFe.sub.2O.sub.4@rGO composites in the decomposition of harmful organic waste.