3 results about "Gold cluster" patented technology

This invention discloses a method for preparing and applying a gold cluster scintillator protected by a stable luminescent free radical ligand. The scintillator material uses (3,5-dichloro-4-pyridine)bis(2,4,6-trichlorobenzene)methyl free radical (PyBTM) as a ligand, and a chain-like tetranuclear free radical cluster is constructed using a one-pot method. The chemical formula of the compound is [Au4(PNP)2(PyBTM)2](SbF6)4, belonging to the triclinic crystal system, space group R-3. This free radical cluster scintillator achieves 100% theoretical exciton utilization and a short radiation decay lifetime due to its unique doublet emission mechanism. These properties make it an ideal candidate material for overcoming the contradiction between high luminous yield and fast response in traditional scintillators. Due to the excellent thermal and water-oxygen stability of this system, it can be fabricated into a scintillator screen to further achieve high-quality X-ray imaging with a spatial resolution of up to 31 LP·mm. ‑1 This provides a general design strategy for high-performance radiation detection materials.

This invention relates to a three-emission ratio fluorescence nanosensor for detecting tetracycline and its preparation method. The sensor uses a carbon dot-gold cluster nanocomposite material as the fluorescence signal. The synthesis steps and detection process of the carbon dot-gold cluster nanocomposite material in this invention are simple, convenient, and rapid, exhibiting rich fluorescence color changes. It does not require the assistance of complexes or coupling reagents. By constructing a three-emission ratio fluorescence sensor, the goal of highly sensitive and selective detection of tetracycline can be achieved.

This invention discloses a gold cluster zinc oxide composite photocatalyst for methane oxidative coupling reactions, its preparation method, and its applications. The gold cluster zinc oxide composite photocatalyst comprises zinc oxide and gold clusters uniformly distributed on its surface. The gold clusters have a particle size ranging from 0.9 to 1.3 nm, and the mass percentage of the gold clusters in the composite photocatalyst is 0.3 to 1.1 wt.%. The prepared gold cluster zinc oxide composite photocatalyst exhibits excellent low-temperature catalytic performance and stability, enabling the high-rate, high-selectivity photo-driven conversion of methane to C2-C4 hydrocarbons at low temperatures in a closed reactor, effectively suppressing the side reaction of excessive methane oxidation to carbon dioxide. This invention also provides a method for preparing the gold cluster zinc oxide composite photocatalyst, which is simple in process, uses simple raw materials, and is inexpensive.