Rigid biimidazole ancillary ligands as an avenue to bright deep blue cationic iridium(iii) complexes
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چکیده
منابع مشابه
Rigid biimidazole ancillary ligands as an avenue to bright deep blue cationic iridium(iii) complexes.
Herein we report the synthesis and optoelectronic characterisation of three deep blue-emitting cationic iridium complexes, of the form [Ir(dFppy)(2)(N^N)]PF(6), bearing biimidazole-type N^N ancillary ligands (dFppyH = 2-(2,4-difluorophenyl)pyridine). Complex 1 contains the parent biimidazole, biim, while 2 contains a dimethylated analog, dMebiim, and 3 contains an ortho-xylyl-tethered biimidzol...
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A new class of cationic iridium(III) complexes of the form [(C(∧)N)2Ir(N(∧)N)][PF6] is reported, where C(∧)N = cyclometallating 2-phenylpyridinato, ppy, or 2-(2,4-difluorophenyl)-5'-methylpyridinato, dFMeppy, and N(∧)N = guanidyl-pyridine, gpy, or -pyrazine, gpz, as the ancillary ligand. A large blue-shift in the emission coupled with a 7-to-9 fold enhancement in photoluminescence quantum yield...
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Three new heteroleptic cationic iridium complexes of the form [Ir(C^N)(btl)](+), where btl = 1,1'-benzyl-4,4'-bi-1H-1,2,3-triazolyl and C^N = 2-phenylpyridine (ppyH) (1), 1-benzyl-4-phenyl-1H-1,2,3-triazole (phtl) (2) or 1-benzyl-4-(2,4-difluorophenyl)-1H-1,2,3-triazole (dFphtl) (3), were synthesized and isolated as their hexafluorophosphate (PF6(-)) salts and fully characterized. The single cr...
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The AIE mechanism for cationic Ir(III) complexes with triazole-pyridine ligands has been determined by the combination of an experimental and a computational study. Larger structural relaxation and weak emissive excited-state intraligand charge transfer (ILCT) characters are responsible for the non-emission in solution, whereas the non-radiative processes are efficiently restricted in the solid...
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ژورنال
عنوان ژورنال: Faraday Discuss.
سال: 2014
ISSN: 1359-6640,1364-5498
DOI: 10.1039/c4fd00107a