4'-(4-bromophenyl)-2,2':6',2''-terpyridine

"Tiangong Kaiwu" has a saying: "The main application field of three-chain aromatics is related to many industries and is quite extensive. In the chemical industry, it is often used as a raw material to synthesize various fine chemicals, such as high-performance plastics, special fibers, etc. Both of which rely on three-chain aromatics as the base, can be made, which greatly promotes the development of materials science, and is indispensable in high-end manufacturing. In the pharmaceutical field, three-chain aromatics can be used as pharmaceutical intermediates to help synthesize a variety of special drugs, play a key role in specific diseases, and make great contributions to human health. In the field of electronics, three-chain aromatics can be specially treated to make materials with unique photoelectric properties, which can be used to manufacture advanced electronic components, improve the performance and stability of electronic products, and promote the progress of electronic technology. Furthermore, in the field of energy, three-chain aromatics can participate in the research and development of some new energy materials, contributing to the development of sustainable energy. In short, three-chain aromatics have important applications in chemical, pharmaceutical, electronics, energy and many other fields, and are actually the key elements of modern industrial development.

"Tian Gong Kaiwu" says: "Where a bell is cast, the high one is made of copper, and the lower one is made of iron. In today's Western casting method, there are iron as the marble, copper as the skin, medium and real soil, and the outer fan is made of sand. Molten copper is poured into it, and the iron marble does not melt, and the copper skin is firm, which is also a method."
Looking at what you call "4%27-%284-%E6%BA%B4%E8%8B%AF%E5%9F%BA%29-2%2C2%27%3A6%27%2C2%27%27-%E4%B8%89%E8%81%94%E5%90%A1%E5%95%B6%E7%9A%84%E5%90%88%E6%88%90%E6%96%B9%E6%B3%95", although the words are obscure, I can speculate on the method of casting.
There are many ways to cast a three-ring tool. First, you can cast three rings separately, and then connect them with mortise and tenon. Each ring is carefully cast first, and the tenon and mortise that fit are cast at both ends of the ring. After all three rings are formed, the tenon is embedded in the mortise, and it is gently tapped to make it firmly combined, so that the three rings are connected, and the connection is ingenious and seamless.
Second, the lost wax method can also be used for casting. First, the model of the three-ring chain is carefully shaped with wax to ensure that the shape of the three-ring connection is accurate. Then the outer fan is made of fine sand and clay. After the outer fan is dry and firm, heating makes the wax melt and flow out to form a hollow cavity. Then the copper liquid or other suitable metal liquid is carefully poured into the cavity. After the metal liquid cools and solidifies, the outer fan is removed, and the complete three-ring chain can be obtained. This lost wax method can make the shape of the utensils more fine, and the connection of the three rings is natural and smooth, and the integration is seamless.
Third, if conditions permit, you can also try the method of casting and welding. First cast the three rings separately, and then choose the appropriate solder to weld the connection of the three rings firmly at high temperature. When welding, pay attention to the heat and the amount of solder to ensure that the welding place is firm and smooth, so that the three rings become a closely integrated whole.

The physical properties of tribenzene are as follows:
tribenzene, tribenzene, tribenzene, tribenzene. Tribenzene is the most common, and its outer surface is white crystal. Melting at 174 ° C, boiling at 384 ° C, phase density 1.184 (20/4 ° C), insoluble in water, slightly soluble in alcohols and ethers, soluble in benzene.
tribenzene, colored crystal, melting at 86 ° C, boiling at 371.1 ° C, density 1.0051g/cm ³ (99/4 ° C).
tribenzene melts at 57 ° C, boiling at 364 ° C, density 1.025 (20/4 ° C).
Tribenzene has a certain quality, and it is not easy to react biochemically under normal conditions. However, under specific conditions, such as high temperature, oxidation, etc., its benzene may react. Its chemical properties are mainly determined by the properties of benzene, which is typical of aromatics, and can be generated instead of reactive, addition reactive, etc. In terms of workmanship, tribenzene is often used as a high additive medium, plasticizer, etc. Its physical properties enable it to maintain stability and good performance under high temperature conditions.

There is a question today, what is the status of tribenzene in the market? I can answer this question in the format of classical Chinese after imitating "Tiangong".
The use of tribenzene depends on the market, due to factors such as product quality, supply and demand. The refined one is high or high; and the inferior one is slightly low.
Under normal circumstances, if the three benzene levels of ordinary work are used in benzene, the cost of each product is probably high. However, if the high cost is used in key fields such as refined chemical industry and children, the cost can be increased to the cost of gold.
When it is used in the field, it will be closed to the market. If the supply is more than the demand, there may be a decrease in price; if it is necessary to be prosperous and the supply is less, it must be paid. And in different places, due to the difference between the price and the price, there is also a difference in price. Therefore, if you want to know the price, you can only get it if you study the quality of the city and the quality of the product.

"Tiangong Kaiwu" has a saying: "The purity of lead in the third refining has a great impact on its performance. The purity of lead is related to its quality and properties, and is important for many purposes."
Lead with high purity has a purer texture and fewer impurities. Taking the casting tool as an example, high-purity lead has a smoother surface and few defects, because its impurities are not easy to produce pores, trachoma and other defects during the casting process. And in terms of conductivity, high-purity lead performs better and can transfer heat or current more efficiently. In some application scenarios with high conductivity requirements, such as specific heat exchange devices or electrical components, high-purity lead can play its advantages.
Furthermore, in the chemical reaction, when high-purity lead participates in the reaction, the reaction process is more stable and controllable due to less impurity interference, and the purity and quality of the obtained product are also more guaranteed.
However, if the purity of lead is low and there are many impurities, it is easy to cause various quality problems in the utensils during casting, which affects its appearance and practicality. During the chemical reaction, impurities may react with the reactants, resulting in impure products and affecting the quality of the final product. And low-purity lead is more prone to corrosion and other phenomena due to the presence of impurities during long-term use, which reduces its service life. Therefore, when smelting lead, it is crucial to improve its purity, which can greatly improve the performance of lead, make it more effective in various applications, and meet the needs of different industries and scenarios.