Restoration of catalytic activity by replacement of a coordinated amide group: Synthesis and laser-induced luminescence studies of the phosphate diester transesterification catalyst [Eu(NBAC)](3+)

被引：37
作者：
Amin, S
Voss, DA
Horrocks, WD
Morrow, JR
机构：
[1] SUNY BUFFALO, DEPT CHEM, BUFFALO, NY 14260 USA
[2] PENN STATE UNIV, UNIVERSITY PK, PA 16802 USA
来源：
INORGANIC CHEMISTRY | 1996年 / 35卷 / 26期
关键词：
MACROCYCLIC COMPLEXES; EUROPIUM(III); LANTHANUM(III); CRYSTAL;
D O I：
10.1021/ic9516469
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The europium(III) complex of the octadentate tetraamide ligand is inactive as a catalyst for phosphate diester transesterification or for RNA cleavage. Replacement of one of the amide coordinating groups to form a new heptadentate ligand yields a europium(III) complex ([Eu(NBAC)](3+)) that is a very active catalyst for phosphate diester transesterification at 37 degrees C, pH 7.40. Laser-induced luminescence is used to study the number of bound water molecules and self-association of the [Eu(NBAC)](3+) complex as well as the dissociation of the complex in the presence of competing ligands. [GRAPHICS]
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页码：7466 / +
相关论文
共 17 条
[1]   EUROPIUM(III) LUMINESCENCE EXCITATION SPECTROSCOPY - QUANTITATIVE CORRELATION BETWEEN THE TOTAL CHARGE ON THE LIGANDS AND THE 7F0-]-5D0 TRANSITION FREQUENCY IN EUROPIUM(III) COMPLEXES [J].
ALBIN, M ;
HORROCKS, WD .
INORGANIC CHEMISTRY, 1985, 24 (06) :895-900
[2]   LASER-INDUCED LUMINESCENCE STUDIES AND CRYSTAL-STRUCTURE OF THE EUROPIUM(III) COMPLEX OF 1,4,7,10-TETRAKIS(CARBAMOYLMETHYL)-1,4,7,10-TETRAAZACYCLODODECANE - THE LINK BETWEEN PHOSPHATE DIESTER BINDING AND CATALYSIS BY LANTHANIDE(III) MACROCYCLIC COMPLEXES [J].
AMIN, S ;
VOSS, DA ;
HORROCKS, WD ;
LAKE, CH ;
CHURCHILL, MR ;
MORROW, JR .
INORGANIC CHEMISTRY, 1995, 34 (12) :3294-3300
[3]   LANTHANIDE(III) TETRAAMIDE MACROCYCLIC COMPLEXES AS SYNTHETIC RIBONUCLEASES - STRUCTURE AND CATALYTIC PROPERTIES OF [LA(TCMC)(CF3SO3)(ETOH)](CF3SO3)(2) [J].
AMIN, S ;
MORROW, JR ;
LAKE, CH ;
CHURCHILL, MR .
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH, 1994, 33 (07) :773-775
[4]  
AMIN S, UNPUB INORG SYNTH
[5]  
AMIN S, 1995, THESIS STATE U NEW Y
[6]   INTER-MOLECULAR ENERGY-TRANSFER BETWEEN LANTHANIDE COMPLEXES IN AQUEOUS-SOLUTION .4. STEREOSELECTIVITY IN THE TRANSFER FROM TERBIUM(III) TO EUROPIUM(III) COMPLEXES OF ASPARTIC-ACID [J].
BRITTAIN, HG .
INORGANIC CHEMISTRY, 1979, 18 (07) :1740-1745
[7]   RNA CLEAVAGE AND PHOSPHATE DIESTER TRANSESTERIFICATION BY ENCAPSULATED LANTHANIDE IONS - TRAVERSING THE LANTHANIDE SERIES WITH LANTHANUM(III), EUROPIUM(III), AND LUTETIUM(III) COMPLEXES OF 1,4,7,10-TETRAKIS(2-HYDROXYALKYL)-1,4,7,10-TETRAAZACYCLODODECANE [J].
CHIN, KOA ;
MORROW, JR .
INORGANIC CHEMISTRY, 1994, 33 (22) :5036-5041
[8]   SYNTHESIS AND SOLUTION PROPERTIES OF LANTHANUM(III), EUROPIUM(III), AND LUTETIUM(III) THP COMPLEXES AND AN X-RAY-DIFFRACTION STUDY OF A CRYSTAL CONTAINING 4 STEREOISOMERS OF A EUROPIUM(III) THP COMPLEX (THP = 1,4,7,10-TETRAKIS(2-HYDROXYPROPYL)-1,4,7,10-TETRAAZACYCLODODECANE) - METHYL-GROUPS IMPART RIGIDITY TO S,S,S,S-THP MACROCYCLIC COMPLEXES [J].
CHIN, KOA ;
MORROW, JR ;
LAKE, CH ;
CHURCHILL, MR .
INORGANIC CHEMISTRY, 1994, 33 (04) :656-664
[9]   LUMINESCENCE DECAY TIMES AND BIMOLECULAR QUENCHING - ULTRAFAST KINETICS EXPERIMENT [J].
DEMAS, JN .
JOURNAL OF CHEMICAL EDUCATION, 1976, 53 (10) :657-663
[10]   Closely diffusing O-H, amide N-H and methylene C-H oscillators quench the excited state of europium complexes in solution [J].
Dickins, RS ;
Parker, D ;
deSousa, AS ;
Williams, JAG .
CHEMICAL COMMUNICATIONS, 1996, (06) :697-698
12