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Cyclometalated Ir(III) complexes [Ir(tpy)(bbibH2)Cl][PF6] and [Ir(tpy)(bmbib)Cl][PF6]: intramolecular ∙∙∙ interaction leading to facile synthesis and enhanced luminescence

03.07.2018 | Zhong-Ze Qu; Tao-Bao Gao; Jing Wen; Kai Rui; Haibo Ma; Deng-Ke Cao, Dalton Transactions, 2018

Cyclometalated Ir(III) complexes [Ir(tpy)(bbibH2)Cl][PF6] (1PF6) and [Ir(tpy)(bmbib)Cl][PF6] (2PF6), and the controlled complex [Ir(tpy)(mbib)Cl][PF6] (3PF6) have been synthesized at 135 oC for 10 hours for the former two complexes, while at 190 oC for 24 hours for the latter complex (Scheme ...


Preparation of polynuclear NHC complexes by post-synthetic modification of half-sandwich rhodium and iridium complexes bearing C-azolato ligands

03.07.2018 | Francisco Aznarez; Wen-Xi Gao; Yue-Jian Lin; F. Ekkehardt Hahn; Guo-Xin Jin, Dalton Transactions, 2018

A series of bimetallic and trimetallic complexes has been prepared by N-alkylation of mononuclear half-sandwich rhodium and iridium di-NHC complexes featuring bidentate chelate ligands composed of a classical NHC and a C-azolato donor. The shape and the separation between metal centers in the ...


Creating Capsules with Cubanes

03.07.2018 | Sotaro Kusumoto; Fumiya Kobayashi; Ryo Ohtani; Yingjie Zhang; J. M. Harrowfield; Yang Kim; Shinya Hayami; Masaaki N ..., Dalton Transactions, 2018

A sextuply linked capsule incorporating two Ni(II) cubane units is formed when Ni(II) salts are reacted with N-aminoalkyl salicylamidato ligands in a 4:3 ratio in methanol. With a short (propyl) alkyl substituent, additional chloride counter ions are included in the cavity by occupation of one ...


Novel magnetite nanorods decorated Si-Schiff base complex for efficient immobilization of U(VI) and Pb(II) from water solutions

03.07.2018 | Xiangke Wang; Ayub Khan; JINLU XING; Ahmed Mourtada Elseman; Pengcheng Gu; Kashif Gul; Yuejie Ai; Riffat Jehan; Ahme ..., Dalton Transactions, 2018

A novel silicon Schiff base complex (Si-SBC) and magnetite nanorods decorated Si-SBC (M/SiO2-Si-SBC) were synthesized and well characterized in detail. The synthesized materials were applied for the removal of U(VI) and Pb(II) from water solutions under various experimental conditions. The ...


Synthesis of cationic molybdenum-cobalt heterometallic clusters protected against hydrolysis by macrocyclic triazacyclononane complexes

03.07.2018 | Sugiarto .; Tomoko Tagami; Keisuke Kawamoto; Yoshihito Hayashi, Dalton Transactions, 2018

Four kinds of cobalt-polyoxomolybdenum clusters were synthesized by a combination of polyoxomolybdates and a Co-tacn (tacn = 1,4,7-triazacyclononane) complex. The heterometallic polynuclear clusters were obtained by the reaction of Na2MoO4 and [Co(tacn)(H2O)3](CF3SO3)3∙H2O in aqueous solution. ...


Group 2 Metal Bis(arenecarbochalcogenoate)(Crown Ether) Complexes: Isolation and Structural Analysis

03.07.2018 | Yoshiharu Tatematsu; shinzi kato; Norio Nakata; Masahiro Ebihara; Osamu Niyomura; Koh Sugamata; Mariko Yukimoto; Mao ..., Dalton Transactions, 2018

A series of Group 2 metal bis(arenecarbochalcogenoato)(crown ether) complexes M(EE’CAr)2(L)(L’)x (M = Mg, Ca, Sr, Ba; Ar = aryl; E = S, Se; E’ = O, S; L = H2O or THF; L’ = 15-crown-5, 18-crown-6) were synthesized and their structures were revealed by X-ray analyses. The two carbothioato ligands ...


Versatile coordination of acetazolamide to ruthenium(II) p-cymene complexes and preliminary cytotoxicity studies

03.07.2018 | Lorenzo Biancalana; Lucinda K. Batchelor; Gianluca Ciancaleoni; Stefano Zacchini; Guido Pampaloni; Paul J. Dyson; Fa ..., Dalton Transactions, 2018

The carbonic anhydrase inhibitor acetazolamide (AcmH2) reacted with [(η6-p-cymene)RuCl(μ-Cl)]2 to afford [(η6-p-cymene)RuCl2(κN-AcmH2)], 1A, in near-quantitative yield. In methanol, 1A exists in equilibrium with 1B, being probably a coordination isomer, as established by VT 1H-EXSY NMR ...


Triazole vs Triazolium Carbene Ligands in the Site-Selective Cyclometallation of o-Carboranes by M(III) (M=Ir,Rh) Complexes

03.07.2018 | Maria Frutos; Mar Gomez-Gallego; Elena A Giner; Miguel A. Sierra; Carmen Ramirez de Arellano, Dalton Transactions, 2018

Ir(III) and Rh(III)-mediated site-selective cage B–H and C–H bond activation in o-carboranylmethyl derivatives has been achieved. The selectivity of the reaction is related to the electron donating properties of the ligand. 1,2,3-triazole-Derivatives use the N2 position of the triazole ring to ...


Synthesis, Structure, Photophysical and Electrochemical Properties of Ru(II) Complexes of Arylene-Vinylene Terpyridyl Conjugates

03.07.2018 | Amit Sil; Sabyasachi Roy Chowdhury; Sabyashachi Mishra; Sanjib K Patra, Dalton Transactions, 2018

A series of arylene-vinylene π-conjugated terpyridyl ruthenium(II) complexes, [Ru(PPh3)2Cl(tpy-C6H4-CH=CH-Ar)][PF6] (1-4; tpy = 2,2':6',2''-terpyridyl where Ar = phenyl, tolyl, 1-naphthyl and 9-anthracenyl as substituents on 4′ position of tpy) have been synthesized and characterized by ...


Microwave-assisted dry-gel conversion - a new sustainable route for the rapid synthesis of metal-organic frameworks with solvent re-use

03.07.2018 | Niels Tannert; Serkan Gökpinar; Emrah Hastürk; Sandra Nießing; Christoph Janiak, Dalton Transactions, 2018

Microwave-assisted dry-gel conversion (MW-DGC) combines advantages of concentrated reactants in DGC with fast heating by microwave irradiation. This novel combination allows to drastically decrease the amount of solvent needed for synthesis and reaction times with energy needed. Further, MW-DGC ...


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