Structural control of the photoluminescence of silole regioisomers and their utility as sensitive regiodiscriminating chemosensors and efficient electroluminescent materials
Structural control of the photoluminescence of silole regioisomers and their utility as sensitive regiodiscriminating chemosensors and efficient electroluminescent materials
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DOI：
10.1021/jp0503462
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发表时间：
2005-05-26
影响因子：
3.3
通讯作者：
Tang, BZ
中科院分区：
文献类型：
--
作者：
Li, Z;Dong, Y;Tang, BZ
我们合成了一组硅胶区域异构体，它们的光致发光随区域结构的变化而变化很大。通过内部阻碍分子内的转动，我们成功地合成了一种在溶液中具有强发光的新型硅胶(1(3，4))，其在丙酮中的荧光量子产率高达83%。我们发现，1(3，4)是一种灵敏的化学传感器，能够光学区分对、邻、间硝基苯胺的区域异构体。与人们普遍认为的相反，1(2，4)的晶体形成蓝移了它的发射颜色，提高了它的发射效率。基于1(2，4)晶体的发光二极管在较高的电流效率(5.86 cd/A)下发射出强蓝光(464 Nm)。
We synthesized a group of silole regioisomers whose photoluminescence varied dramatically with its regiostructure. By internally hindering the intramolecular rotation, we succeeded in creating a novel silole (1(3,4)) that is strongly luminescent in solutions and whose fluorescence quantum yield in acetone is as high as 83%. We revealed that 1(3,4) was a sensitive chemosensor capable of optically discriminating nitroaromatic regioisomers of p-, o-, and m-nitroanilines. Against general belief, crystal formation Of 1(2,4) blue-shifted its emission color and boosted its emission efficiency. The light-emitting diode based on the crystal Of 1(2,4) emitted a strong blue light (464 nm) in a high current efficiency (5.86 cd/A).