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Zheng, Zhen Nu,Lee, Soon-W. Korean Chemical Society 2011 Bulletin of the Korean Chemical Society Vol.32 No.6
Two lanthanide complexes, $[Ln(NO_3)_2(H_2O)_3(L)_2](NO_3)(H_2O)$ {Ln = Eu (1), Tb (2); L = 2-(4-pyridylium)-ethanesulfonate, $(4-pyH)^+-CH_2CH_2-SO_3^-)$}, were prepared from lanthanide nitrate and 4-pyridineethanesulfonic acid in $H_2O$ under microwave-heating conditions. Complexes 1 and 2 are isostructural, and the lanthanide metal in both complexes is coordinated to nine oxygen atoms. The pyridyl nitrogen in the ligand is protonated to give a zwitter ion that possesses an $NH^+$ (pyridyl) positive end and an $SO_3^-$ negative end. All O-H and N-H hydrogen atoms participate in hydrogen bonds to generate a two-dimensional (complex 1) or a three-dimensional network (complex 2). Complex 1 exhibits an intense red emission, whereas complex 2 exhibits an intense green emission in the solid state at room temperature.
Zhen Nu Zheng,이순원 대한화학회 2011 Bulletin of the Korean Chemical Society Vol.32 No.6
Two lanthanide complexes, [Ln(NO_3)_2(H_2O)_3(L)_2](NO_3)(H_2O) {Ln = Eu (1), Tb (2); L = 2-(4-pyridylium)-ethanesulfonate, (4-pyH)^+-CH_2CH_2-SO_3^–)}, were prepared from lanthanide nitrate and 4-pyridineethanesulfonic acid in H_2O under microwave-heating conditions. Complexes 1 and 2 are isostructural, and the lanthanide metal in both complexes is coordinated to nine oxygen atoms. The pyridyl nitrogen in the ligand is protonated to give a zwitter ion that possesses an NH^+ (pyridyl) positive end and an SO_3^– negative end. All O−H and N−H hydrogen atoms participate in hydrogen bonds to generate a two-dimensional (complex 1) or a threedimensional network (complex 2). Complex 1 exhibits an intense red emission, whereas complex 2 exhibits an intense green emission in the solid state at room temperature.
김용주,Zhen Nu Zheng,Hyuck Hee Lee,이순원 대한화학회 2011 Bulletin of the Korean Chemical Society Vol.32 No.9
Dinuclear Ni(II)–thiophene halides, which contain linear bridging thienylenes, trans,trans-[(PR_3)_2(X)Ni–Y–Ni(X)(PR_3)_2] {X = Cl, Br; H2Y = 5,5'-dichloro-2,2'-bithiophene (H2bth); H2tth = 5,5''-dichloro-2,2':5',2''-terthiophene (H_2tth)} were prepared by the oxidative addition of dihalobithiophene (H_2bth) or dihaloterthiophene (H_2tth) to [Ni(COD)_2] in the presence of tertiary phosphines. Subsequent reactions of NaN_3 with the dinuclear Ni(II)–thiophene chlorides gave the corresponding Ni(II)–azido complexes, trans,trans-[(PR_3)_2(N_3)Ni–Y–Ni(N_3)(PR_3)_2], whose reactivity toward trimethylsilyl pseudohalides such as trimethylsilyl isothiocyanates and cyanides was investigated. In addition, the reaction of trans-[BrNi(PEt_3)_2–C_4H_2S–C_4H_2S–CHO], a thienyl Ni(II) complex containing a terminal aldehyde group, with phosphonium ylide was examined.
Sun Hwa Han,Zhen Nu Zheng,Sung Il Cho,이순원 대한화학회 2012 Bulletin of the Korean Chemical Society Vol.33 No.6
Three isostructural lanthanide coordination polymers, [Ln(L)3(H2O)2](H2O)3 {Ln = Eu (1), Tb (2), Gd (3); L = trans-3-(3-pyridyl)acrylate, (3-py)–CH=CH–COO}, were prepared from HL, lanthanide nitrate, and NaOH in H2O by microwave heating. In all coordination polymers, the metal is bonded to eight oxygen atoms, and all pyridyl nitrogen atoms do not coordinate to the metals. All polymers have a 1-D loop-connected chain structure. The hydrogen atoms in the aqua ligands and lattice water molecules all participate in the hydrogen bonds of the O–H···O or O–H···N type. The hydrogen bonds connect the 1-D chains to create a 2-D network. Polymer 1 exhibited red luminescence in the solid state at room temperature.
Han, Sun-Hwa,Zheng, Zhen Nu,Cho, Sung-Il,Lee, Soon-W. Korean Chemical Society 2012 Bulletin of the Korean Chemical Society Vol.33 No.6
Three isostructural lanthanide coordination polymers, $[Ln(L)_3(H_2O)_2](H_2O)_3$ {Ln = Eu (1), Tb (2), Gd (3); L = $trans$-3-(3-pyridyl)acrylate, (3-py)-CH=CH-COO}, were prepared from HL, lanthanide nitrate, and NaOH in $H_2O$ by microwave heating. In all coordination polymers, the metal is bonded to eight oxygen atoms, and all pyridyl nitrogen atoms do not coordinate to the metals. All polymers have a 1-D loop-connected chain structure. The hydrogen atoms in the aqua ligands and lattice water molecules all participate in the hydrogen bonds of the O-$H{\cdots}O$ or O-$H{\cdots}N$ type. The hydrogen bonds connect the 1-D chains to create a 2-D network. Polymer 1 exhibited red luminescence in the solid state at room temperature.
Kim, Yong-Joo,Lee, Hyuck-Hee,Zheng, Zhen Nu,Lee, Soon-W. Korean Chemical Society 2011 Bulletin of the Korean Chemical Society Vol.32 No.9
Dinuclear Ni(II)-thiophene halides, which contain linear bridging thienylenes, trans,trans-[$(PR_3)_2$(X)Ni-Y-Ni(X)$(PR_3)_2$] {X = Cl, Br; $H_2Y$ = 5,5'-dichloro-2,2'-bithiophene ($H_2bth$); $H_2tth$ = 5,5"-dichloro-2,2':5',2''-terthiophene ($H_2tth$)} were prepared by the oxidative addition of dihalobithiophene ($H_2bth$) or dihaloterthiophene ($H_2tth$) to [$Ni(COD)_2$] in the presence of tertiary phosphines. Subsequent reactions of $NaN_3$ with the dinuclear Ni(II)-thiophene chlorides gave the corresponding Ni(II)-azido complexes, trans,trans-[$(PR_3)_2(N_3)$Ni-Y-Ni$(N_3)(PR_3)_2$], whose reactivity toward trimethylsilyl pseudohalides such as trimethylsilyl isothiocyanates and cyanides was investigated. In addition, the reaction of trans-[$BrNi(PEt_3)_2-C_4H_2S-C_4H_2S$-CHO], a thienyl Ni(II) complex containing a terminal aldehyde group, with phosphonium ylide was examined.