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Cover Picture: Redox‐Responsive Porphyrin‐Based Molecular Tweezers (Chem. Eur. J. 25/2012)
Author(s) -
Iordache Adriana,
Retegan Marius,
Thomas Fabrice,
Royal Guy,
SaintAman Eric,
Bucher Christophe
Publication year - 2012
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201290101
Subject(s) - chemistry , intramolecular force , redox , porphyrin , crystallography , supramolecular chemistry , chemical physics , nanotechnology , materials science , stereochemistry , photochemistry , crystal structure , inorganic chemistry
A star‐forming cloud in the constellation of Cassiopeia, known as the Pacman Nebula for its resemblance to the video game character, is depicted in the background (picture by Dr. F. Dubreuil). The shape and function of the Pacman character are reminiscent of the redox‐controlled open/close molecular motions occurring within a flexible bisporphyrin molecular architecture. Switching between the open/closed arrangements (bottom) is achieved by redox control of noncovalent interactions between organic π radicals. The electronic impulse triggering the tweezer‐like movement is represented as lightning striking a redox responsive molecular hinge (top). The idea of movement is highlighted by the depiction of transition states on the pathway from the closed to the open forms: For more information, see the Communication by C. Bucher, E. Saint‐Aman et al. on page 7648 ff.