Fluorine-programmed nanozipping to tailored nanographenes on rutile TiO2 surfaces
Fluorine-programmed nanozipping to tailored nanographenes on rutile TiO2 surfaces
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DOI：
10.1126/science.aav4954
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发表时间：
2019-01-04
期刊：
影响因子：
56.9
通讯作者：
Amsharov, K.
中科院分区：
文献类型：
--
作者：
Kolmer, M.;Zuzak, R.;Amsharov, K.
直接在非金属表面上合理合成纳米石墨烯和碳纳米带一直是一个难以实现的目标。我们报道，碳（C）-氟（F）键的活化是一种可靠的和通用的工具，使分子内芳基-芳基直接在金属氧化物表面上偶联。通过C-F键活化实现的具有挑战性的多步转化导致多米诺骨牌式偶联，其直接在金红石二氧化钛表面上产生定制的纳米石墨烯。由于有效的区域选择性拉链，我们得到了目标纳米石墨烯从柔性前体。前体结构中的氟位置明确规定了“拉链程序”的运行，导致低聚亚苯基链的卷起。氟化氢拉链的高效率使得我们的方法对于直接在绝缘和半导体表面上合理合成纳米石墨烯和纳米带具有吸引力。
The rational synthesis of nanographenes and carbon nanoribbons directly on nonmetallic surfaces has been an elusive goal for a long time. We report that activation of the carbon (C)-fluorine (F) bond is a reliable and versatile tool enabling intramolecular aryl-aryl coupling directly on metal oxide surfaces. A challenging multistep transformation enabled by C-F bond activation led to a dominolike coupling that yielded tailored nanographenes directly on the rutile titania surface. Because of efficient regioselective zipping, we obtained the target nanographenes from flexible precursors. Fluorine positions in the precursor structure unambiguously dictated the running of the "zipping program," resulting in the rolling up of oligophenylene chains. The high efficiency of the hydrogen fluoride zippingmakes our approach attractive for the rational synthesis of nanographenes and nanoribbons directly on insulating and semiconducting surfaces.