TY - JOUR
T1 - Synthesis, structures, electrochemistry and catalytic activities of copper(II) and palladium(II) complexes with asymmetric tetraazacycloannulenes
AU - Kim, E. H.
AU - Kim, D. I.
AU - Lee, H. S.
AU - Na, H. G.
AU - Byun, J. C.
AU - Choi, J. H.
AU - Park, Y. C.
PY - 2007/1/2
Y1 - 2007/1/2
N2 - Copper(II) and palladium(II) complexes with 15-membered asymmetric 5,9-dihydro-2,4,10,12-tetramethyl-1,5,9,13-monobenzotetraazacyclo[15]tetradecine have been synthesized and characterized. The electrochemical behaviors of the complexes showed a reduction and two one-electron irreversible oxidation waves in given potential ranges due to the metal ion and macrocycle ring, respectively. The electrocatalytic reduction of dioxygen on glassy carbon electrodes electropolymerized by such 15-membered and 14-membered tetraazaannulene complexes occurred at 160-280 mV (versus SCE), less negative than on the bared one at pH 7.0. The catalytic activities of the copper(II) complexes in the oxidation of p-Xstyrene (X = OCH3, CH3, H, F, Cl) were higher than those of the palladium(II) ones. The structures of the 15-membered copper(II) and palladium(II) complexes were determined using the X-ray diffraction method.
AB - Copper(II) and palladium(II) complexes with 15-membered asymmetric 5,9-dihydro-2,4,10,12-tetramethyl-1,5,9,13-monobenzotetraazacyclo[15]tetradecine have been synthesized and characterized. The electrochemical behaviors of the complexes showed a reduction and two one-electron irreversible oxidation waves in given potential ranges due to the metal ion and macrocycle ring, respectively. The electrocatalytic reduction of dioxygen on glassy carbon electrodes electropolymerized by such 15-membered and 14-membered tetraazaannulene complexes occurred at 160-280 mV (versus SCE), less negative than on the bared one at pH 7.0. The catalytic activities of the copper(II) complexes in the oxidation of p-Xstyrene (X = OCH3, CH3, H, F, Cl) were higher than those of the palladium(II) ones. The structures of the 15-membered copper(II) and palladium(II) complexes were determined using the X-ray diffraction method.
KW - Cu(II)- and Pd(II)-tetraazacycloannulene
KW - Electrocatalytic reduction
KW - Spectral and electrochemical properties
KW - Structure
UR - http://www.scopus.com/inward/record.url?scp=33751427229&partnerID=8YFLogxK
U2 - 10.1016/j.poly.2006.07.033
DO - 10.1016/j.poly.2006.07.033
M3 - Article
AN - SCOPUS:33751427229
SN - 0277-5387
VL - 26
SP - 85
EP - 92
JO - Polyhedron
JF - Polyhedron
IS - 1
ER -