π-Conjugated polymer with Alloxazine-6,9-diyl unit in the Main chain: Synthesis, chemical properties, and sensing ability for metal ions and nucleosides
作者:Isao Yamaguchi、Nanami Fujii、Aohan Wang
DOI:10.1016/j.reactfunctpolym.2020.104691
日期:2020.10
respectively. The onset position of the UV-vis spectrum of the polymer is observed at a longer wavelength (λonset = 540 nm) than the model compound (λonset = 520 nm), thus revealing the presence of a π-conjugated system extending along the polymer chain. The polymer and model compound are both photoluminescent in solution (λem = 581 nm for the polymer and λem = 557 nm for the model compound), and their photoluminescence
摘要由新合成的单体经钯络合物催化的缩合反应,制备了由4,6,9-二甲氧嘧啶单元和9,9-二己基芴-2,7-二基单元组成的π共轭聚合物。还使用单体通过相同的反应合成了新型模型化合物6,9-双(9,9-二己基芴-2-基)四恶嗪。聚合物的Mn和Mw分别为13,500和21,600。在比模型化合物(λonset= 520 nm)更长的波长(λonset= 540 nm)处观察到聚合物的UV-vis光谱的起始位置,因此揭示了沿聚合物链延伸的π共轭体系的存在。 。聚合物和模型化合物在溶液中均为光致发光的(聚合物的λem= 581 nm,模型化合物的λem= 557 nm),并且其光致发光(PL)随着添加核苷(腺苷(A)和鸟苷(G))以及金属离子(Cu(I),Cu(II)和Zn(II))而逐渐降低。添加核苷和金属盐后PL强度的降低很可能是由于电子从最初受激的聚合物转移到由聚合物Alloxazine单元和