Self-Assembly and Host-Guest Behaviors of a Supramolecular Helicate Feii 2l3

Abstract

A novel helicate complex [Fe II 2 L 3 ] 4+ resulted from subcomponent self-assembly of a C 3-symmetric triamine, 2-formylpyridine and octahedral iron(II) in CH 3 CN, which was confirmed by ESI-MS measurement. After the addition of selected planar aromatic molecules in CD 3 CN solution, shifts of 1 H NMR signals of the helicate were investigated. The results revealed that the size, functional group and symmetry of guest molecules remarkably influence the interaction patterns.

The template effect of a SiF62−guest drives the formation of a heteroleptic Fe(ii) coordination helicate

“…In the host, these are mainly controlled by the strands of the helicate. On the other hand, one can find cationic, 20,21 neutral 22 or anionic 23,24 guests. This multipartite nature allows introducing molecular functions via the different components.…”

“…This multipartite nature allows introducing molecular functions via the different components. Thus, (i) the metals may introduce single-molecule magnet (SMM) behavior, spin crossover (SCO) 25,26 or luminescent properties, 27 (ii) the strands may bring properties such as fluorescence 6 or photo-isomerization ability, 28 and (iii) the guest may be exploited to introduce optical properties 22 or differential guest-exchange properties. 29 This provides an entry into multifunctional systems, ideally producing synergic effects.…”