White light emission from a single organic molecule with dual phosphorescence at room temperature.

White light emission from a single organic molecule with dual phosphorescence at room temperature.
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室温下具有双磷光的单个有机分子发射白光

DOI:
10.1038/s41467-017-00362-5
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发表时间:
2017-09-04
影响因子:
16.6
通讯作者:
Tang BZ
Tang BZ
中科院分区:
综合性期刊1区
文献类型:
--
作者:
He Z;Zhao W;Lam JWY;Peng Q;Ma H;Liang G;Shuai Z;Tang BZ

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单分子白色发光材料的开发对于室温下的纯磷光无金属体系是极具挑战性的。在这里,我们报告了一个单一的纯有机磷光体,即4-氯苯甲酰基二苯并噻吩,发射白色室温磷光与国际委员会de l 'Éclair-age坐标为(0.33,0.35)。实验和理论研究表明,这种白色发光是由第一和第二激发三重态的双磷光产生的。我们还证明了该策略的有效性,以实现无金属的纯磷光单分子白色发光体的intrasystem混合双室温磷光所产生的低和高的三重态。
The development of single molecule white light emitters is extremely challenging for pure phosphorescent metal-free system at room temperature. Here we report a single pure organic phosphor, namely 4-chlorobenzoyldibenzothiophene, emitting white room temperature phosphorescence with Commission Internationale de l’Éclair-age coordinates of (0.33, 0.35). Experimental and theoretical investigations reveal that the white light emission is emerged from dual phosphorescence, which emit from the first and second excited triplet states. We also demonstrate the validity of the strategy to achieve metal-free pure phosphorescent single molecule white light emitters by intrasystem mixing dual room temperature phosphorescence arising from the low- and high-lying triplet states.
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