The Research Of Activation Of The Sp~3 C-O Bond And Triphenylene-Based Discotic Liquid Crystals Containing Ferrocene

In chapter one, we use FeCl3 as Lewis Acid-type catalyst to realize the activation of the benzylic sp3 C-O bond of the benzylic ethers which then undergo the Friedel-Crafts reactions with arenes. The reaction has the characteristic of moderation and doesn't need high temperature. The obvious advantage of the reaction is using FeCl3 as catalyst which is cheap, available easily and not toxic. The reaction exploits a new way to utilize alcohols,phenols, ethers which are common, cheap and available easily. It will come true to use compounds containing C-O bond as substrates of reactions instead of aryl halides which are not benign to environment.In chapter two, several series of triphenylene-based compounds containing ferrecene or not were synthesized. The results show that triphenylene-based compounds containing hydroxy in the end of one substituent have a mesophase, triphenylene-based compounds containing ferrocene in the end of one substituent don't have a mesophase, ferrocene-bridged triphenylene dimers have a mesophase while the spacers are sufficient long; phene-bridged triphenylene dimers don't have a mesophase while the spacers are sufficient rigid, but they are mesogenic while the spacers are sufficient flexible. The substituent containing ferrocene in the end of it has a large volume and a big molecular weight, which results in disappearance of mesophase. It is possible that a dimer plays an important role in promoting the formation of a mesophase of triphenylene-based compounds containing ferrocene. It is also possible that ferrocene is more flexible than phene in the spacers of triphenylene dimers.