Cyclometalated Ir(<scp>iii</scp>) complexes of deprotonated N-methylbipyridinium ligands: effects of quaternised N centre position on luminescence
作者:Benjamin J. Coe、Madeleine Helliwell、James Raftery、Sergio Sánchez、Martyn K. Peers、Nigel S. Scrutton
DOI:10.1039/c5dt03753k
日期:——
The optical emission behaviour of tricationic IrIII complexes depends markedly on the position of the N-methyl unit in cyclometalating ligands.
三正离子IrIII配合物的光发射行为明显取决于环金属配体中N-甲基基团的位置。
Direct C–H Sulfonylimination of Pyridinium Salts
作者:Lihua Luo、Juan Tang、Rui Sun、Wenjing Li、Xueli Zheng、Maoling Yuan、Ruixiang Li、Hua Chen、Haiyan Fu
DOI:10.1021/acs.orglett.2c00725
日期:2022.4.22
A direct pyridinium C–H sulfonylimination has been developed for the synthesis of sulfonyl iminopyridine derivatives with high efficiency. This transformation features the direct and efficient formation of a C═N bond with a high functional group tolerance under metal-free conditions. The spectroscopic properties potentially enable these sulfonyl iminopyridine compounds to be useful new emitting materials
Which is the Stronger Nucleophile, Platinum or Nitrogen in Rollover Cycloplatinated(II) Complexes?
作者:Fatemeh Niroomand Hosseini、S. Masoud Nabavizadeh、Mahdi M. Abu-Omar
DOI:10.1021/acs.inorgchem.7b02678
日期:2017.12.4
1b; and X = 4, 1c) containing two potential nucleophilic centers have been investigated to elucidate which center is the stronger nucleophile toward methyl iodide. On the basis of DFT calculations, complexes 1b and 1c are predicted reacting with MeI through the free nitrogen donor to form N-methylated platinum(II) complexes, while complex 1a reacts through oxidative addition on platinum to give a platinum(IV)
Plaquevent, Jean-Christophe; Chichaoui, Ilhame, Bulletin de la Societe Chimique de France, 1996, vol. 133, # 4, p. 369 - 379
作者:Plaquevent, Jean-Christophe、Chichaoui, Ilhame
DOI:——
日期:——
Synthesis and electrochemical properties of bis(bipyridine)ruthenium(II) complexes bearing pyridinyl- and pyridinylidene ligands induced by cyclometalation of N′-methylated bipyridinium analogs
作者:Take-aki Koizumi、Takashi Tomon、Koji Tanaka
DOI:10.1016/j.jorganchem.2004.11.032
日期:2005.3
Ruthenium complexes with bipyridine-analogous quaternized (N,C) bidentate ligands [RuL(bpy)(2)](PF6)(2) (bpy = 2,2'-bipyridine, (1), L = L-1 = N'-methyl-2,4'-bipyridinium; (2), L = L-2 = N'-methyl-2,3'-bipyridinium) were synthesized and characterized. The structure of complex 2 was determined by the X-ray structure analysis. The C-13H-1} NMR spectroscopic and cyclic voltammetric studies indicate that the coordination modes of these ligands are quite different, that is, the C-coordinated rings of (N,C)-ligands in 1 and 2 are linked to ruthenium(II) with a pyridinium manner and a pyridinylidene one, respectively. The ligand-localized redox potentials of 1 and 2 also revealed the substantial difference in the electron donating ability of both ligands. (c) 2004 Elsevier B.V. All rights reserved.