Facile access to furo[2′,3′:4,5]pyrido[3,2,1-jk]carbazol-5-ones as blue emitters: photophysical, electrochemical, thermal and DFT studies
作者:Monika Ahuja、Supriya Das、Pratibha Sharma、Ashok Kumar、Anvita Srivastava、Sampak Samanta
DOI:10.1016/j.molstruc.2021.130044
日期:2021.6
A series of thermally stable (up to ≤339°C) and blue fluorescent furo[2′,3′:4,5]pyrido[3,2,1-jk]carbazol-5-ones (FPCOs) with high quantum yields (Ø ≥ 0.75) are reported. These hybrid scaffolds have been synthesized from a bunch of Morita‐Baylis‐Hillman acetate of nitroalkenes and 4-hydroxy-6H-pyrido[3,2,1-jk]carbazol-6-one (HPCO) promoted by DABCO as an organobase at room temperature. All the new chemical
一系列具有高量子产率的热稳定(最高≤339°C)和蓝色荧光呋喃[2',3':4,5]吡啶[3,2,1- jk ]咔唑-5-酮(FPCO)报告(Ø≥0.75)。这些杂种支架是由一堆硝基烯烃的森田-贝利斯-希尔曼乙酸酯和由DABCO促进的4-羟基-6 H-吡啶并[3,2,1- jk ]咔唑-6-一(HPCO)合成的有机基在室温下。所有新的化学结构均通过其光谱学技术(例如FT-IR,1 H NMR和1313 C NMR,HRMS。靶向支架的溶剂变色研究显示,随着溶剂极性的增加,吸收和发射光谱发生蓝移。有趣的是,在低极性溶剂以及含有给电子基团的产物的情况下,也可获得更高的量子产率。密度泛函理论计算表明,供电子取代基导致较低的HOMO-LUMO间隙,从而导致吸收光谱的红移。此外,化合物的化学硬度,整体柔软性和化学势描述符也得到了很好的估计。TD-DFT计算很好地解决了合成支架电子跃迁的本质。此外,通