Strong and directed association of porphyrins and iron(terpyridine)s using hydrogen bonding and ion pairing

被引:16
作者
Norsten, TB
Chichak, K
Branda, NR
机构
[1] Simon Fraser Univ, Dept Chem, Burnaby, BC V5A 1S6, Canada
[2] Univ Alberta, Dept Chem, Edmonton, AB T6G 2G2, Canada
关键词
hydrogen bond(s); luminescence quenching; molecular recognition; porphyrins; self-assembly;
D O I
10.1016/S0040-4020(01)01096-1
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
The combination of cooperative hydrogen bonding and ion pairing between cationic iron(II)terpyfidines and anionic porphyrins yielded remarkably stable neutral complexes even in the highly competitive solvent DMSO. Isothermal titration calorimetry (ITC) was used to compare association constants, enthalpies and entropies of binding between various combinations of the two molecular components that make up the complexes. Steady-state luminescence studies highlighted that, as expected, the fluorescence quenching of the porphyrin is maximized in the cases where the iron(terpyridine) is strapped the tightest across the macrocycle. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:639 / 651
页数:13
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