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Self‐Assembly through Coordination and π‐Stacking: Controlled Switching of Circularly Polarized Luminescence
Author(s) -
Niu Dian,
Jiang Yuqian,
Ji Lukang,
Ouyang Guanghui,
Liu Minghua
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201900607
Subject(s) - chirality (physics) , supramolecular chirality , stacking , supramolecular chemistry , chromophore , non covalent interactions , luminescence , self assembly , chemistry , coordination complex , crystallography , nanotechnology , materials science , photochemistry , metal , molecule , optoelectronics , crystal structure , hydrogen bond , physics , organic chemistry , chiral symmetry breaking , quantum mechanics , nambu–jona lasinio model , quark
Multiple noncovalent interactions can drive self‐assembly through different pathways. Here, by coordination‐assisted changes in π‐stacking modes between chromophores in pyrene‐conjugated histidine (PyHis), a self‐assembly system with reversible and inversed switching of supramolecular chirality, as well as circularly polarized luminescence (CPL) is described. It was found that l ‐PyHis self‐assembled into nanofibers showing P‐chirality and right‐handed CPL. Upon Zn II coordination, the nanofibers changed into nanospheres with M‐chirality, as well as left‐handed CPL. The process is reversible and the M‐chirality can change to P‐chirality by removing the Zn II ions. Experimental and theoretical models unequivocally revealed that the cooperation of metal coordination and π‐stacking modes are responsible the reversible switching of supramolecular chirality. This work not only provides insight into how multiple noncovalent interactions regulate self‐assembly pathways.