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salen ligands. These V- or propeller-type salen ligands with
small p-conjugated systems emit strong blue, green, and red
AIE through little p–p interactions and strong non-covalent
intermolecular interactions, such as O/H, H/H, C/H, F/
H, F/F, Cl/H, Cl/O, and Cl/Cl. Moreover, combine with the
advantages of non-conjugation and chirality, these so mate-
rials have multiple and strong interactions with anions and
amino acids by hydrogen and halogen bonds, and thus they
might be used as universal anion probes and chiral receptors of
unprotected amino acids with a good enantiomeric selectivity.
Therefore, we believe that these simple salen ligands provide
a new paradigm in the design of chiral and non-conjugated
uorescent materials for developing advanced organic opto-
electronic devices, orescent bio-probes, and cell imaging, and
so on. Further studies on circularly polarized luminescence30 of
these salen ligands are currently underway in our laboratory.
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Conflicts of interest
There are no conicts to declare.
Acknowledgements
cid¼home_promo.
This work was supported by the National Natural Science
Foundation of China (no. 21372169). We acknowledge the
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40648 | RSC Adv., 2017, 7, 40640–40649
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