Syntheses and Mesomorphic and Luminescent Properties of Disubstituted Polyacetylenes Bearing Biphenyl Pendants
作者:Yuping Dong、Jacky W. Y. Lam、Han Peng、Kevin K. L. Cheuk、Hoi Sing Kwok、Ben Zhong Tang
DOI:10.1021/ma049094d
日期:2004.8.1
light-emitting poly(2-alkyne)s and poly(1-phenyl-1-alkyne)s containing biphenyl (Biph) cores, alkyl spacers, and alkoxy tails (-RC=C[(CH2)m-OCO-Biph-OC7H15]}n-, where R, m = CH3, 4 [P1(4)]; CH3, 9 [P1(9)]; C6H5, 4 [P2(4)]; and C6H5, 9 [P2(9)]}, were synthesized and the effects of the spacer length and backbone structure on the properties of the polymers were investigated. The disubstituted acetylene monomers
包含联苯(Biph)核,烷基间隔基和烷氧基尾基(-RC = C [(CH 2)米-OCO-的BiPh-OC 7 H ^ 15 ]} ñ - ,其中[R,米= CH 3,4 [P 1(4)]; CH 3,9 [P 1(9)]; C ^ 6 ħ 5,4 [P 2(4)];和C 6 H ^ 5,9 [P 2(9)]},合成了间隔基长度和骨架结构对聚合物性能的影响。双取代乙炔单体[ 1(m)和2(m)(m = 4,9)]是通过联苯羧酸(6)与ω-炔醇[ 4(m)或5(m)]酯化制备的。通过WCl 6-,MoCl 5-和NbCl 5 -Ph 4进行1(m)和2(m)的聚合。Sn和WCl 6 -Ph 4 Sn催化的反应在最佳条件下可以以高收率(高达81%)生产高分子量(M w高达3.1×10 5)的聚合物P 1(m)和P 2(m))。通过核磁共振(NMR),热重分析(TGA),差示扫描量热法(DSC