207450-54-2Relevant academic research and scientific papers
New bis-tetraarylcyclopentadienones
Rusanov,Keshtov,Keshtava,Petrovskii,Shchegolikhin,Kirillov,Kiree
, p. 318 - 320 (1998)
Reactions of new bis(a-diketones) with 1,3-diphenylacetone resulted in new bis(tetraarylcyclopentadienones).
Hyperbranched pyridylphenylene polymers based on the first-generation dendrimer as a multifunctional monomer
Kuchkina,Zinatullina,Serkova,Vlasov,Peregudov,Shifrina
, p. 99510 - 99516 (2015/12/05)
An A6 + B2 approach was applied for the first time to synthesize novel hyperbranched pyridylphenylene polymers by Diels-Alder cyclocondensation reaction. For this, the first-generation pyridylphenylene dendrimer with six ethynyl functionalities (A6) was used as a branching core for the molecule growth. The phenyl-substituted bis(cyclopentadienone)s (B2) of different structures were used as co-monomer in the reaction. A careful choice of reaction conditions allowed us to obtain high molecular weight polymers without undesirable gelation. The molecular weight of the polymers varied in the range of 10800-80100 with a polydispersity degree of 1.69 to 4.07 according to SEC analysis. The 1H and inverse-gated decoupling 13C NMR combined with heteronuclear single quantum correlation and heteronuclear multiple bond correlation measurements were used to estimate the branching degree of the polymers synthesized.
