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A Pyrenyl-Appended Triazole-Based Calix[4]arene as a Fluorescent Sensor for Iodide Ion
김종승,Sun Young Park,Sang Hoon Kim,Pierre Thuéry,Rachid Souane,Susan E. Matthews,Jacques Vicens 대한화학회 2010 Bulletin of the Korean Chemical Society Vol.31 No.3
The synthesis and evaluation of a novel calix[4]arene-based fluorescent chemosensor 1 for the detection of I‒ is described. The fluorescent changes observed upon addition of various anions show that 1 is selective for I‒ over other anions. Addition of I‒ results in ratiometric measurements with 1 : 1 complex ratio.The synthesis and evaluation of a novel calix[4]arene-based fluorescent chemosensor 1 for the detection of I‒ is described. The fluorescent changes observed upon addition of various anions show that 1 is selective for I‒ over other anions. Addition of I‒ results in ratiometric measurements with 1 : 1 complex ratio.
Grosshauser, Michael,Comba, Peter,Kim, Jee Young,Ohto, Keisuke,Thué,ry, Pierre,Lee, Young Hoon,Kim, Yang,Harrowfield, Jack The Royal Society of Chemistry 2014 Dalton Transactions Vol.43 No.15
<P>A bispidine-like ligand involving four pyridine-N and three aliphatic-N donor atoms forms a bimetallic species with CuCl<SUB>2</SUB> in which all seven N-donors are bound and which aggregates in the crystal through double chloride-bridging to give a tetranuclear unit. The magnetism of this solid can be interpreted in terms of a relatively weak antiferromagnetic coupling between the two Cu(<SMALL>II</SMALL>) centres of the dinuclear subunits and a strong ferromagnetic coupling of the Cu(<SMALL>II</SMALL>) centres in different dinuclear units involved in the bis-chlorido bridge. In solution, the assembly decays into the dinuclear subunits and, in agreement with the solid state studies, the interaction between the corresponding Cu<SUP>II</SUP> centres is shown to be primarily due to dipole–dipole coupling.</P> <P>Graphic Abstract</P><P>A binuclear complex of copper(<SMALL>II</SMALL>) chloride with a heptadentate bispidine-like ligand undergoes dimerisation in the solid state involving chloride bridging and leading to both ferro- and antiferromagnetic coupling of the Cu(<SMALL>II</SMALL>) centres. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c4dt00305e'> </P>
Lee, Young Hoon,Kristopo, Hari,Woo, Arim,Won, Mi Seon,Hayami, Shinya,Thué,ry, Pierre,Jung, Ok-Sang,Lee, Hong In,Kim, Bok Jo,Lindoy, Leonard F.,Kim, Yang CSIRO Publishing 2012 Australian journal of chemistry Vol.65 No.7
<P> Two new polyamine ligands, L1 and L2, incorporating pyridyl and aliphatic amine donor sites have been prepared and their reaction with copper(ii) yields the mono- and binuclear complexes [Cu(L1)](ClO4)2 (1) and [Cl2Cu(L2)CuCl(H2O)]ClO4 (2), respectively. The X-ray structure of 1 confirms that the five nitrogen donors of L1 are bound to the central copper ion to give a distorted square pyramidal coordination sphere. In 2, L2 acts as a bridging ligand with its N3-donor coordination domains separated by a m-xylylene spacer group. An unusual feature of this latter complex is that symmetrical L2 gives rise to non-equivalent coordination behaviour at the individual copper sites; while both sites display five-coordination with distorted square pyramidal arrangements, they differ in having N3Cl2- and N3ClO-donor atom sets, respectively. The electron paramagnetic resonance (EPR) spectra of both complexes are discussed. Variable temperature magnetic susceptibility data confirmed the absence of magnetic interactions in 1 while a weak antiferromagnetic interaction between copper(ii) centres occurs in 2. </P>
Functionalised azetidines as ligands: pyridyl-complemented coordination
Lee, Young Hoon,Harrowfield, Jack,Kim, Yang,Lim, Woo Taik,Park, Yu Cheol,Thué,ry, Pierre Royal Society of Chemistry 2009 Dalton Transactions Vol.2009 No.3
<P>A relatively simple azetidine derivative with 2-aminoethyl and 2-pyridyl substituents functions as a tridentate ligand towards Cu(<SMALL>II</SMALL>), giving species in which the CuN<SUB>3</SUB> unit is essentially planar and that, in the solid state, show a subtle balance between mononuclear and binuclear forms, allowing both to be simultaneously present in some lattices. Displacement of the ligand from Cu(<SMALL>II</SMALL>) by the use of cyanide results in the formation of cyanogen, which appears to slowly react with the free amine to give an oxamidine characterised in its doubly-deprotonated form as its binuclear Ni(<SMALL>II</SMALL>) complex.</P> <P>Graphic Abstract</P><P>A tridentate pyridylazetidine derivative forms binuclear complexes with Cu(<SMALL>II</SMALL>) and terephthalate in which the dicarboxylate is present in two protonation states. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=b812295d'> </P>
Lee, Young Hoon,Harrowfield, Jack M.,Kim, Jong Seung,Kim, Yang,Lee, Min Hee,Lim, Woo Taik,Park, Yu Cheol,Thué,ry, Pierre Royal Society of Chemistry 2009 Dalton Transactions Vol.2009 No.3
<P>Selective functionalisation of the tridentate ligand 1-(2-aminoethyl)-3-methyl-3-(2-pyridyl)azetidine at its terminal amino-nitrogen atom can be readily achieved by both reductive alkylation and simple alkylation reactions to give tri-, quadri-, quinque- and sexi-dentate derivatives. Simple alkylation by 2-picolinyl chloride provides the only example of a second reaction pathway where the azetidine ring of the reactant has undergone activation towards ring opening. Structural characterisation of the Cu(<SMALL>II</SMALL>) complexes of these ligands has revealed several remarkable aspects of their solid-state coordination chemistry, including the formation of infinite helical aggregates through π-stacking and tetramerisation through carboxylate bridging, as well as further examples of the crystallisation of mixed species found to be rather common with complexes of the parent ligand.</P> <P>Graphic Abstract</P><P>Elaboration of a pyridyl–azetidine to obtain ligands of higher denticity enables the formation of a variety of Cu(<SMALL>II</SMALL>) complexes showing unusual solid state structures. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=b812298a'> </P>