Rationalization of Supramolecular Chirality in a Bisporphyrin System

摘要

Supramolecular chirality is a growing multidisciplinary field of modern research and attracts much attention from the scientific community because of its vital importance for various natural processes and for its attractive possibilities for new smart technologies.Of the vast number of host-guest and self-associated systems,supramolecular assemblies based on porphyrin chromophores are of particular interest for in-depth investigation and potential application as a consequence of them having specific and well-suited physicochem-ical and spectroscopic properties.However,it is apparent that effective control of any functional system rests upon the comprehensive understanding of the detailed operative mechanisms and the corresponding driving forces.In the case of porphyrin-based supramolecular chiral assemblies (particularly,containing two or more porphyrins) there are two major factors which make such studies an arduous task:the dynamic nature of noncovalent assemblies and the complex electronic structure of these pigments as a consequence of the existence of several differently oriented electronic transitions.