A molecular boron cluster-based chromophore with dual emission
A molecular boron cluster-based chromophore with dual emission
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DOI：
10.1039/d0dt00826e
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发表时间：
2020-12-07
影响因子：
4
通讯作者：
Spokoyny, Alexander M.
中科院分区：
文献类型：
--
作者：
Anderson, Kierstyn P.;Waddington, Mary A.;Spokoyny, Alexander M.
通过使用AlCl 3和Br-2的亲电取代，将发光硼烷anti-B18 H22溴化，得到作为空气稳定的结晶固体的单取代衍生物4-Br-anti-B18 H21。与未取代的母体化合物相比，4-Br-抗-B18 H21在用UV光激发时具有双重发射，并在410 nm处显示荧光，在503 nm处显示磷光，在无氧环己烷中Phi（总）= 0.07。环己烷溶液中氧含量的增加使磷光信号猝灭。荧光信号强度不受氧气的影响，这表明该分子可用作比率氧探针。
Bromination of the luminescent borane, anti-B18H22, via electrophilic substitution using AlCl3 and Br-2, yields the monosubstituted derivative 4-Br-anti-B18H21 as an air-stable crystalline solid. In contrast to the unsubstituted parent compound, 4-Br-anti-B18H21 possesses dual emission upon excitation with UV light and exhibits fluorescence at 410 nm and phosphorescence at 503 nm, with Phi(total) = 0.07 in oxygen-free cyclohexane. Increased oxygen content in cyclohexane solution quenches the phosphorescence signal. The fluorescent signal intensity remains unaffected by oxygen, suggesting that this molecule could be used as a ratiometric oxygen probe.