The synthesis of new heterocyclic oligo(phenylene) analogues based on soluble, nonaggregating 1,2-diazines is reported. Improved palladium-catalyzed reductive coupling methods were developed to allow for the preparation of large quantities of iptycene-derived bipyridazines and biphthalazines, and the controlled synthesis of well-defined oligomers up to sexipyridazine. Crystallographic, spectroscopic, and computational evidence indicate that in these analogues, hindrance at the ortho position is relaxed relative to poly(phenylenes). The resulting building blocks are promising for incorporation in conjugated electronics materials, and as new iptycene-derived ligands for transition metals.
已经通过一种新型的一锅法合成了三种基于刚性氮杂-三苯乙烯单元的均质三环金属化铱 (III) 配合物 ( Ir1 – Ir3 )。通过单次 X 射线结构分析揭示了Ir2的配位排列,分子显示出面部构型。这些配合物表现出优异的热稳定性,T d为454-520°C。由于引入了具有刚性空间位阻减少分子间相互作用的氮杂-三苯乙烯骨架,这些配合物表现出强烈的绿色磷光发射,量子产率超过 70%。因此,基于Ir1、Ir2和Ir3的电致发光器件在 30 wt% 的高掺杂浓度下,表现出 42194、48807 和 46332 cd m -2 的高亮度,21.0、24.7和 28.5 cd A -1 的最大发光效率以及 6.3、6.8和 8.9% 的高 EQE。同时,基于Ir1、Ir2和Ir3的非掺杂绿色器件分别提供20571、15407和10707 cd m -2 的高亮度和8.5、9.5和5.4 cd A -1
High internal free volume compositions for low-k dielectric and other applications
申请人:Swager M. Timothy
公开号:US20070117954A1
公开(公告)日:2007-05-24
The present invention provides materials, devices, and methods involving new heterocyclic, shape-persistent monomeric units with internal free volume. In some cases, materials the present invention may comprise monomers, oligomers, or polymers that incorporate a heterocyclic, shape-persistent iptycene. The present invention may provide materials having low dielectric constants and improved stability at high operating temperatures due to the electron-poor character of materials. In addition, compositions of the invention may be easily synthesized and readily modified to suit a particular application.
作者:Jean Bouffard、Robert F. Eaton、Peter Müller、Timothy M. Swager
DOI:10.1021/jo702000d
日期:2007.12.1
The synthesis of new heterocyclic oligo(phenylene) analogues based on soluble, nonaggregating 1,2-diazines is reported. Improved palladium-catalyzed reductive coupling methods were developed to allow for the preparation of large quantities of iptycene-derived bipyridazines and biphthalazines, and the controlled synthesis of well-defined oligomers up to sexipyridazine. Crystallographic, spectroscopic, and computational evidence indicate that in these analogues, hindrance at the ortho position is relaxed relative to poly(phenylenes). The resulting building blocks are promising for incorporation in conjugated electronics materials, and as new iptycene-derived ligands for transition metals.
Aza-triptycene-based homoleptic tris-cyclometalated iridium(III) complexes as highly efficient phosphors in green OLEDs
homoleptic tris-cyclometalated iridium (III) complexes (Ir1–Ir3) based on a rigid aza-triptycene unit have been synthesized via a novel one-pot method. The coordination arrangement of Ir2 was revealed by single X-ray structural analysis and the molecule showed a facial configuration. These complexes exhibited excellent thermal stability with Td of 454–520 °C. These complexes exhibit strong green phosphorescence
已经通过一种新型的一锅法合成了三种基于刚性氮杂-三苯乙烯单元的均质三环金属化铱 (III) 配合物 ( Ir1 – Ir3 )。通过单次 X 射线结构分析揭示了Ir2的配位排列,分子显示出面部构型。这些配合物表现出优异的热稳定性,T d为454-520°C。由于引入了具有刚性空间位阻减少分子间相互作用的氮杂-三苯乙烯骨架,这些配合物表现出强烈的绿色磷光发射,量子产率超过 70%。因此,基于Ir1、Ir2和Ir3的电致发光器件在 30 wt% 的高掺杂浓度下,表现出 42194、48807 和 46332 cd m -2 的高亮度,21.0、24.7和 28.5 cd A -1 的最大发光效率以及 6.3、6.8和 8.9% 的高 EQE。同时,基于Ir1、Ir2和Ir3的非掺杂绿色器件分别提供20571、15407和10707 cd m -2 的高亮度和8.5、9.5和5.4 cd A -1