IRPC Public has filed a patent for a novel fluorene derivative that can be used as a material for organic light-emitting diode devices. The derivative has a specific chemical structure and can be obtained through various methods outlined in the patent. GlobalData’s report on IRPC Public gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on IRPC Public, microscale biofuel reactors was a key innovation area identified from patents. IRPC Public's grant share as of June 2023 was 1%. Grant share is based on the ratio of number of grants to total number of patents.
A recently filed patent (Publication Number: US20230159457A1) describes a fluorene derivative with a specific chemical structure. The patent also includes a method for preparing this fluorene derivative and a polymer comprising repeating units of the fluorene derivative.
The fluorene derivative described in the patent has a structure represented by formula (I). The patent claims that X in the formula can be either Br or I, Y is a group represented by —(CH2)n— where n is an integer ranging from 3 to 10, and R1, R2, R3, and R4 are identical.
The patent also provides a method for preparing the fluorene derivative. The method involves reacting a fluorene compound with a halogenating agent or triflating agent in the presence of a catalyst, followed by reacting the compound obtained from the first step with a C3-C12 alkyl halide in the presence of the halogenating agent or triflating agent and a strong base. The reaction conditions for these steps are specified in the patent.
Furthermore, the patent describes a polymer comprising repeating units of the fluorene derivative. The polymer can also include repeating units of other fluorene derivatives. The patent claims that the polymer can be used as a blue, red, green, or white electroluminescent material. The patent also provides details about the weight average molecular weight, number average molecular weight, and polydispersity index of the polymer.
In addition to the fluorene derivative and the polymer, the patent also discloses a light-emitting element comprising the polymer and a method for preparing the polymer through polymerization of monomers containing the fluorene derivatives. The patent specifies the mole ratios and reaction conditions for the polymerization process.
Overall, this patent provides detailed information about a specific fluorene derivative, its preparation method, and its application in polymers and light-emitting elements.
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