Metal-directed assembly of combinatorial libraries—principles and establishment of equilibrated libraries with oligopyridine ligands

Encapsulation of Metalloporphyrins in a Self‐Assembled Cubic M8L6 Cage: A New Molecular Flask for Cobalt–Porphyrin‐Catalysed Radical‐Type Reactions

“…1 8, 160.7, 154.8, 151.8, 149.6, 127.4, 137.1, 131.2, 125.0, 122.4, 121.5 ppm; 1 H and 13 C NMR data are in agreement with those published. [24] Synthesis of 8: Compound 7 (48.8 mg, 66 mmol), FeA C H T U N G T R E N N U N G (OTf) 2 (30.5 mg, 88 mmol), 6 (48.6 mg, 264 mmol) and DMF (5 mL) were mixed in an oven-dried Schlenk flask under an argon atmosphere. The mixture was degassed three times and stirred for 16 h at 70 8C.…”

A metallopolymer case-history: polymer, ring or ligand reaction?

“…1,2 Although many coordination and organometallic motifs have been investigated, an important class of metallopolymers is derived from ditopic ligands of generic structure 1 incorporating two 2,2 0 :6 0 ,2 00 -terpyridine (tpy) metal-binding domains linked by a,o-dioxy chains. 13,14 Solutions of cobalt(II) complexes in various solvents or mixed solvents were prepared by adding the desired solvent (or solvent mixture) to a 1 : 1 mixture of 2 and Co(OAc) 2 Á4H 2 O to give a final concentration of Co 2+ of 5.9 mM. [6][7][8][9][10] The average molecular weights of solution species are reported to be time-and concentration-dependent, 11,12 consistent with equilibration leading eventually to cyclic systems.…”

Kinetics and Thermodynamics of Constitutional Dynamic Coordination Systems Based on FeII, CoII, NiII, CuII, and ZnII

“…For complex metal‐coordination systems, reverse‐phase HPLC, liquid extraction, size exclusion chromatography, CD spectroscopy, and 1 H NMR spectroscopy, have been applied. Fe II complexes present particular challenges, and the use of advanced paramagnetic NMR spectroscopy is required in the case of Cu II and Co II . Moreover, spectroscopic analyses can give rise to misinterpretations, especially in the case of metal ion‐paired species .…”

“…Fe II complexes present particular challenges, [27] and the use of advanced paramagnetic NMR spectroscopy is required in the case of Cu II and Co II . [28] Moreover, spectroscopic analyses can give rise to misinterpretations, especially in the case of metal ion-paired species. [29] To overcome these problems, the evaluation of metal-based dynamic systems has been attempted by ESI-MS spectrometry.…”