Long-Lived Photoluminescence of Molecular Group 14 Compounds through Thermally Activated Delayed Fluorescence
Long-Lived Photoluminescence of Molecular Group 14 Compounds through Thermally Activated Delayed Fluorescence
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DOI：
10.1021/acs.inorgchem.2c00182
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发表时间：
2022-05-16
影响因子：
4.6
通讯作者：
Milsmann, Carsten
中科院分区：
文献类型：
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作者：
Gowda, Anitha S.;Lee, Tia S.;Milsmann, Carsten
与磷光过渡金属配合物相比，利用主族金属和类金属的大自旋轨道耦合常数来获得长寿命三重激发态的光致发光分子相对较少.本文报道了三个对空气和湿气稳定的14族化合物E（MePDPPh）_2的合成，其中E =Si，Ge或Sn，[MePDPPh]_2-是2，6-双（5-甲基-3-苯基-1H-吡咯-2-基）吡啶的双去质子化形式。在溶液中，所有三种分子都表现出非常长的三重激发态，其寿命在毫秒范围内，并表现出高效的光致发光（Phi
Photoluminescent molecules exploiting the sizablespin-orbit coupling constants of main group metals and metalloidsto access long-lived triplet excited states are relatively rarecompared to phosphorescent transition metal complexes. Herewe report the synthesis of three air- and moisture-stable group 14compounds E(MePDPPh)2,whereE=Si,Ge,orSnand[MePDPPh]2-is the doubly deprotonated form of 2,6-bis(5-methyl-3-phenyl-1H-pyrrol-2-yl)pyridine. In solution, all threemolecules exhibit exceptionally long-lived triplet excited stateswith lifetimes in the millisecond range and show highly efficientphotoluminescence (Phi