Synthesis and luminescence of monohalogenated B18H22 clusters
Synthesis and luminescence of monohalogenated B18H22 clusters
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DOI：
10.1016/j.poly.2022.116099
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发表时间：
2022-09-15
期刊：
影响因子：
2.6
通讯作者：
Spokoyny, Alexander M.
中科院分区：
文献类型：
--
作者：
Anderson, Kierstyn P.;Rheingold, Arnold L.;Spokoyny, Alexander M.
这项工作通过探索单卤化背景下的簇反应性和所得化合物的发光性质，推进了抗B18 H22化学的基础。本文报道了新的抗-B18 H_（22）衍生物4-I-B_（18）H_（21）和7-Cl-B_（18）H_（21）的合成和光致发光性能，并与已有的其它单卤代化合物进行了对比。利用AlCl 3和I2的亲电卤化在B4顶点产生碘化，以43%的分离产率产生4-I-B18 H21。该化合物在514 nm处具有氧不敏感的磷光（Phi = 0.16）。通过用N-氯代琥珀酰亚胺和盐酸处理母体硼烷对B7顶点进行氯化，以76%的分离产率得到7-Cl-B18 H21，其在418 nm处产生荧光发射，并表现出迄今报道的B18 H22衍生物的最高量子产率之一，Phi = 0.80。
This work advances the foundation of anti-B18H22 chemistry by exploring cluster reactivity in the context of monohalogenation and the luminescent properties of the resulting compounds. The synthesis and photo -luminescent properties of new anti-B18H22 derivatives 4-I-B18H21 and 7-Cl-B18H21 are described and bench -marked against other existing monohalogenated species reported previously. Electrophilic halogenation utilizing AlCl3 and I2 produces iodination at the B4 vertex to produce 4-I-B18H21 in 43 % isolated yield. This compound exhibits oxygen-insensitive phosphorescence at 514 nm (Phi = 0.16). Chlorination of the B7 vertex through treatment of the parent borane with N-chlorosuccinimide and hydrochloric acid gives 7-Cl-B18H21 in 76 % isolated yield, which produces fluorescent emission at 418 nm and exhibits one of the highest quantum yields of B18H22 derivatives reported to date, Phi = 0.80.