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Bipolar thianthrene derivatives exhibiting room temperature phosphorescence for oxygen sensing
Dyes and Pigments ( IF 4.1 ) Pub Date : 2019-06-01 , DOI: 10.1016/j.dyepig.2019.107605
Ausra Tomkeviciene , Asta Dabulienė , Tomas Matulaitis , Matas Guzauskas , Viktorija Andruleviciene , Juozas Vidas Grazulevicius , Yuri Yamanaka , Yoshio Yano , Toshikazu Ono

The series of donor-acceptor (D-A) compounds consisting of a thianthrene donor and either a benzophenone or a diphenylsulfone acceptor units were designed and synthesized via Suzuki cross-coupling. By varying the number of donor units, as well as by introducing heavy atom (Br) into the molecular structure the impact of these substituents on the thermal, electrochemical and emissive properties of the compounds was studied. The compound containing two thianthrene units appeared to have higher thermal stability and higher glass transition temperature than monosubstituted derivative. All thianthrenyl substituted benzophenone or diphenylsulfone compounds showed bipolar behavior. Strong room temperature phosphorescence and dual fluorescence-phosphorescence were observed at room temperature. The compounds containing stronger electron acceptor diphenylsulfone demonstrated a two-fold higher photoluminescence quantum yield values up to 19% in rigid Zeonex® films than that benzophenone derivatives. The crystals of some synthesized compounds demonstrated oxygen sensing ability.



中文翻译:

双极噻吩衍生物具有室温磷光,可用于氧传感

设计并合成了一系列由噻吩供体和二苯甲酮或二苯砜受体单元组成的供体受体(DA)化合物铃木交叉耦合。通过改变供体单元的数量,以及通过将重原子(Br)引入分子结构,研究了这些取代基对化合物的热,电化学和发射性质的影响。与单取代的衍生物相比,含有两个噻吨单元的化合物似乎具有更高的热稳定性和更高的玻璃化转变温度。所有噻吩基取代的二苯甲酮或二苯砜化合物均表现出双极性行为。在室温下观察到强的室温磷光和双重荧光-磷光。含有强电子受体的二苯基砜化合物显示了一个高两倍的光致发光量子产率在刚性值高达19%的Zeonex ®薄膜比二苯甲酮衍生物大。一些合成化合物的晶体显示出氧感应能力。

更新日期:2019-06-01
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