Marsh Adam V, Little Mark, Cheetham Nathan J, Dyson Matthew J, Bidwell Matthew, White Andrew J P, Warriner Colin N, Swain Anthony C, McCulloch Iain, Stavrinou Paul N, Heeney Martin
Department of Chemistry and Centre for Processable Electronics, Imperial College London, London, SW7 2AZ, UK.
Department of Physics and Centre for Processable Electronics, Imperial College London, London, SW7 2AZ, UK.
Chemistry. 2021 Jan 26;27(6):1970-1975. doi: 10.1002/chem.202004517. Epub 2020 Dec 23.
The effect of substituting o-carborane into the most sterically hindered positions of phenanthrene and benzo(k)tetraphene is reported. Synthesised via a Bull-Hutchings-Quayle benzannulation, the crystal structures of these non-linear acenes exhibited the highest aromatic deformation parameters observed for any reported carborane compound to date, and among the largest carboranyl C-C bond length of all organo-substituted o-carboranes. Photoluminescence studies of these compounds demonstrated efficient intramolecular charge-transfer, leading to aggregation induced emission properties. Additionally, an unusual low-energy excimer was observed for the phenanthryl compound. These are two new members of the family of carborane-functionalised non-linear acenes, notable for their peculiar structures and multi-luminescent properties.
报道了将邻碳硼烷取代到菲和苯并[k]四苯最具空间位阻位置的效果。这些非线性并苯通过布尔-哈钦斯-奎尔苯并环化反应合成，其晶体结构显示出迄今为止报道的任何碳硼烷化合物中观察到的最高芳香族变形参数，并且在所有有机取代邻碳硼烷中具有最大的碳硼烷基C-C键长。对这些化合物的光致发光研究表明存在有效的分子内电荷转移，从而导致聚集诱导发光特性。此外，在菲基化合物中观察到一种不寻常的低能量准分子。这是碳硼烷官能化非线性并苯家族的两个新成员，以其独特的结构和多发光特性而著称。
