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electronic-absorption-spectra
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Stimuli-responsive emissive behavior of 1- and 1,3-connectivities in azulene-based imine ligands: Cycloplatination and Pt-Tl dative bond formation
, Article Dalton Transactions ; Volume 46, Issue 34 , 2017 , Pages 11327-11334 ; 14779226 (ISSN) ; Mousavi, N. A ; Bagherzadeh, M ; Kia, R ; Samouei, H ; Sharif University of Technology
Royal Society of Chemistry
2017
Abstract
The preparation of two new azulene-based imine ligands N-(2,6-diisopropylphenyl)-6-tBu-1-azulenylmethaneimine, 3, and N-(2,6-diisopropylphenyl)-6-tBu-3-(2,6-diisopropylphenyliminomethyl)-1-azulenylmethaneimine, 4, is described. These imine ligands display stimuli responsive emissive behavior and their fluorescence can be switched on and off by protonation and neutralization with trifluoroacetic acid and trimethylamine, respectively. The cyclometalation of the monoimine ligand by platinum gave the cyclometalated complex [PtMe(SMe2)(3′)], 5, (where the prime denotes the cyclometalated ligand 3). The reaction of 5 with TlPF6 yields the trinuclear bent Pt2Tl complex {[PtMe(SMe2)(3′)]2(μ-Tl)}PF6,...
Cyclometalated platinum(II) complexes of 2,2′-bipyridine N-oxide containing a 1,1′-bis(diphenylphosphino)ferrocene ligand: structural, computational and electrochemical studies
, Article Dalton Transactions ; Volume 46, Issue 6 , 2017 , Pages 2013-2022 ; 14779226 (ISSN) ; Fereidoonnezhad, M ; Niazi, M ; Mosavi, S. T ; Habib Kazemi, S ; Kia, R ; Shirkhan, S ; Abdollahi Aghdam, S ; Sharif University of Technology
Royal Society of Chemistry
2017
Abstract
The preparation and characterization of new heteronuclear-platinum(ii) complexes containing a 1,1'-bis(diphenylphosphino)ferrocene (dppf) ligand are described. The reaction of the known starting complex [PtMe(κ2N,C-bipyO-H)(SMe2)], A, in which bipyO-H is a cyclometalated rollover 2,2'-bipyridine N-oxide, with the dppf ligand in a 2:1 ratio or an equimolar ratio led to the formation of the corresponding binuclear complex [Pt2Me2(κ2N,C-bipyO-H)2(μ-dppf)], 1, or the mononuclear complex [PtMe(κ1C-bipyO-H)(dppf)], 2, respectively. According to the reaction conditions, the dppf ligand in 1 and 2 behaves as either a bridging or chelating ligand. All complexes were characterized by NMR spectroscopy....