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Tuning the Phosphorescence and Solid State Luminescence of Triarylborane-Functionalized Acetylacetonato Platinum Complexes
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2016-11-21 00:00:00 , DOI: 10.1021/acs.inorgchem.6b01827
George Rajendra Kumar 1 , Pakkirisamy Thilagar 1
Affiliation  

A new series of luminescent cyclometalated platinum complexes with triarylborane-functionalized acetylacetonate ligands is reported. The complexes exhibit solid state luminescence and phosphorescence under ambient conditions. The luminescence color can be tuned from green to red by varying the cyclometalating ligand [2-phenylpyridine (for 1 and 2), 2-thiophenylpyridine (for 3 and 4), 2-thianapthenylpyridine (for 5 and 6)]. The luminescence originates from mixed 3MLCT/3IL [MLCT, metal to ligand charge transfer; IL, intraligand] states of square planar platinum and borane moieties. The π spacer (phenyl or duryl) which connects the boryl and platinum entities has a significant role in determining the photoluminescence efficiency. The bulky duryl spacer in 2, 4, and 6 significantly reduces π–π stacking of the square planar platinum moiety in the solid state and provides a rigid backbone, thereby increasing their quantum yield significantly. The role of Lewis-acidic borane on the photoluminescence features is evaluated by fluoride binding experiments.

中文翻译:

调整三芳基硼烷官能化的乙酰丙酮基铂络合物的磷光和固态发光

报道了具有三芳基硼烷官能化的乙酰丙酮酸酯配体的一系列新的发光环金属化铂配合物。该复合物在环境条件下表现出固态发光和磷光。可以通过改变环金属配体[2-苯基吡啶(对于12而言),2-硫苯基吡啶(对于34而言),2-噻吩并吡啶(对于56而言),将发光颜色从绿色调整为红色。发光来自混合的3 MLCT / 3IL [MLCT,金属到配体的电荷转移;IL,方形平面铂和硼烷部分的配位体状态。连接硼基和铂实体的π间隔基(苯基或duryl)在确定光致发光效率方面起着重要作用。在笨重duryl垫片24,和6显著降低了在固体状态下的正方形的平面铂部分的π-π堆积,并提供一刚性骨架,从而提高他们的量子产率显著。通过氟化物结合实验评估了路易斯酸性硼烷对光致发光特征的作用。
更新日期:2016-11-21
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