Blue-light-emitting complexes: Cationic (2-phenylpyridinato)iridium(III) complexes with strong-field ancillary ligands

Blue-light-emitting complexes: Cationic (2-phenylpyridinato)iridium(III) complexes with strong-field ancillary ligands
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DOI:
10.1002/ejic.200600920
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发表时间:
2007-01-01
影响因子:
2.3
通讯作者:
Kang, Sung Kwon
Kang, Sung Kwon
中科院分区:
化学3区
文献类型:
--
作者:
Chin, Chong Shik;Eum, Min-Sik;Kang, Sung Kwon

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发射)λ(max)是惊人的短[Ir(ppy)(2)(CO)(2)](+)(2a)的荧光强度比[Ir(ppy)(2)(CO)(2)](+)(2a)的高(473,495 nm)的阴离子二氰基配合物[Ir(ppy)(2)(-)(CN)(2)](-),其中CO和CN-都是sp碳配位配体,并且已知是显示高反式效应的强场配体。通过将ppy配体修饰为F(2)Meppy(2,4-二氟-2-苯基-间甲基吡啶阴离子),合成了[Ir(F(2)Meppy)(2)LL '](+)[LL'=(CO)(2)(2aF(2)Me),(PPh 2 Me)(2)(2bF(2)Me)],得到了天蓝色发光(λ max = 441-443和470-471 nm)。((c)Wiley-VCH Verlag GmbH & Co. KGaA,69451魏因海姆,德国,2007)。
The emission) lambda(max) are strikingly shorter (451, 482 nm) for the cationic dicarbonyl complex [Ir(ppy)(2)(CO)(2)](+) (2a) than those (473, 495 nm) of the anionic dicyano complex [Ir(ppy)(2)(-)(CN)(2)](-), where CO and CN- are both sp carbon coordinating ligands and known to be strong-field ligands showing a high trans effect. Sky-blue-light emission (lambda(max) = 441-443 and 470-471 nm) could be obtained by modifying the ppy ligand to F(2)Meppy (2,4-difluoro-2-phenyl-m-methylpyridinato anion) to prepare [Ir(F(2)Meppy)(2)LL'](+) [LL'=(CO)(2) (2aF(2)Me), (PPh2Me)(2) (2bF(2)Me)]. ((c) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007).