Abstract
4,5-Bis(3',5'-di-tert-butylphenylethynyl)-2-methoxyphenol(dendron) was synthesized from 3,5di-tertbutyl phenol,trifluoromethanesulfonic anhydride and 4,5-diethynyl-2-methoxyphenol.The phenolic hydroxyl group was subsequently esterified by trifluoromethanesulfonic anhydride.By coupling different chromophores(biphenyl,azobenzene,anthracene,pyrene) on the as-obtained sulfonic esters,π-conjugate unsymmetrical dendrimers with different cores were obtained.1H NMR,13C NMR spectroscopy,FT-IR spectroscopy and element analysis were deployed to characterize the resultant products.The solubility of the dendrimers reveals that,compared to the cores(varieties of chromophores),all dendrimers are soluble in most common organic solvents.Meanwhile,the dendrimers show improved thermostability.These two characters make the dendrimers to be easily blended with other materials or added into equipments.
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