3 results about "Methylamine" patented technology

The invention provides a two-dimensional double perovskite material. The composition formula of the two-dimensional double perovskite material is AnMIIIMIX8, wherein A is organic amine; MIII is a trivalent metal element; MI is a monovalent metal element; and X is halogen. The two-dimensional double perovskite material has certain advantages of methylamine lead-iodine perovskite and lead-free double perovskite. The material is lead-free and environmentally friendly, has very good light stability and good chemical stability, and is unlikely to deteriorate in air. The material has a suitable andadjustable light absorption band gap, and more importantly can be used for preparing a film at a low temperature by a solution method. The advantages provide basis for the application of the materialin the photovoltaic fields such as solar cells, optical detectors and light-emitting diodes.

The invention discloses a (S)-1-(3-hydroxy-1-phenylpropyl)thiourea unilateral-modified Fe-Anderson-type heteropoly acid catalyst, a preparation method and an application thereof. According to the invention, ammonium molybdate and ferric sulfate are reacted under acidic condition to generate Fe-Anderson-type heteropoly acid parent; then heteropoly acid parent and tris(hydroxymethyl)aminomethane are reacted under backflow condition to obtain amino unilateral-modified Fe-Anderson-type polyoxometallate; (S)-1-(3-hydroxy-1-phenylpropyl)isorhodanate is synthesized; and finally, polyoxometallate and (S)-1-(3-hydroxy-1-phenylpropyl)isorhodanate are subjected to the reaction to obtain the target product. The preparation method has the advantages of simple process, high yield, mild reaction condition, and environment friendlessness; the catalyst can be used for a self-oxidation coupling reaction of a aryl methylamine compound, and has the advantages of environment pollution and high efficiency, high corresponding selectivity, and easy recovery and utilization.