深铬移
化学
香豆素
量子产额
荧光
产量(工程)
四氢呋喃
斯托克斯位移
光化学
组合化学
有机化学
量子力学
物理
冶金
材料科学
溶剂
作者
Wenhao Xue,Ding Wang,Chenyu Li,Zheng Zhai,Tao Wang,Yong Liang,Zun‐Ting Zhang
标识
DOI:10.1021/acs.joc.9b03327
摘要
The synthesis of a unique type of π-expanded coumarin derivatives, bearing six fused phenyl rings, was achieved via one-pot Suzuki reaction and visible light-driven electrocyclization. The large π-expanded 5H-benzo[12,1]tetrapheno[7,6,5-cde]chromen-5-ones were obtained in good to high yields from 1-bromo-2H-phenaleno[1,2,3-de]chromen-2-ones, and the intriguing optical properties were explored by altering the attached functional groups. 2-Arylaminosubstituted-5H-benzo[12,1]tetrapheno[7,6,5-cde]chromen-5-ones showed a large Stokes shift (4005 cm–1) or excellent fluorescence quantum yield (Φf = 0.75) along with significant bathochromic shift in tetrahydrofuran.
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