TY - JOUR
T1 - Color tuning of a nickel complex with a novel N2S2 pyridine-containing macrocyclic ligand
AU - Tamayo, Abel
AU - Casabó, Jaume
AU - Escriche, Lluis
AU - Lodeiro, Carlos
AU - Covelo, Berta
AU - Brondino, Carlos D.
AU - Kivekäs, Raikko
AU - Sillampää, Reijo
PY - 2006/2/6
Y1 - 2006/2/6
N2 - The novel pyridine-containing 14-membered macrocycle 3,11-dithia-7,17- diazabicyclo[11.3.1]heptadeca-1(17),13,-15-triene (L), which contains an N 2S2 donor set, was synthesized, and its protonation behavior was studied by absorption titration with CH3SO3H. The reaction of L with Pd(II) was studied spectroscopically, and the square-planar complex [Pd(L)](BF4) was isolated and characterized. The reactions between L and NiX2·6H2O (X = BF 4, ClO4) in ethanol or acetonitrile afforded the octahedral complexes [Ni(CH3CN)(H2O)(L)](X)2 and [Ni(H2O)2(L)](X)2, respectively. The square-planar complexes [Ni(L)](X)2 were obtained by heating these octahedral complexes. Spectrophotometric titrations of [Ni(L)](BF 4)2 were performed with neutral and negatively charged ligands. The color of nitromethane solutions of this square-planar complex turns from red to cyan, purple, blue, yellow-green, and pink following addition of halides, acetonitrile, water, pyridine, and 2,2′-bipyridine, respectively. X-ray structural analyses were carried out on the {[Ni(ClO4)(H 2O)(L)][Ni(H2O)2(L)]}(ClO4) 3, [Ni(CH3CN)(H2O)(L)](ClO4) 2, [{Ni(L)}2(μ-Cl)2](ClO4) 2, and [{Ni(L)}2(μ-Br)2]Br 2·2CH3NO2 complexes.
AB - The novel pyridine-containing 14-membered macrocycle 3,11-dithia-7,17- diazabicyclo[11.3.1]heptadeca-1(17),13,-15-triene (L), which contains an N 2S2 donor set, was synthesized, and its protonation behavior was studied by absorption titration with CH3SO3H. The reaction of L with Pd(II) was studied spectroscopically, and the square-planar complex [Pd(L)](BF4) was isolated and characterized. The reactions between L and NiX2·6H2O (X = BF 4, ClO4) in ethanol or acetonitrile afforded the octahedral complexes [Ni(CH3CN)(H2O)(L)](X)2 and [Ni(H2O)2(L)](X)2, respectively. The square-planar complexes [Ni(L)](X)2 were obtained by heating these octahedral complexes. Spectrophotometric titrations of [Ni(L)](BF 4)2 were performed with neutral and negatively charged ligands. The color of nitromethane solutions of this square-planar complex turns from red to cyan, purple, blue, yellow-green, and pink following addition of halides, acetonitrile, water, pyridine, and 2,2′-bipyridine, respectively. X-ray structural analyses were carried out on the {[Ni(ClO4)(H 2O)(L)][Ni(H2O)2(L)]}(ClO4) 3, [Ni(CH3CN)(H2O)(L)](ClO4) 2, [{Ni(L)}2(μ-Cl)2](ClO4) 2, and [{Ni(L)}2(μ-Br)2]Br 2·2CH3NO2 complexes.
UR - http://www.scopus.com/inward/record.url?scp=32544458527&partnerID=8YFLogxK
U2 - 10.1021/ic051574d
DO - 10.1021/ic051574d
M3 - Article
C2 - 16441124
AN - SCOPUS:32544458527
SN - 0020-1669
VL - 45
SP - 1140
EP - 1149
JO - Inorganic Chemistry
JF - Inorganic Chemistry
IS - 3
ER -