Abstract
AbstractPolylactide is rarely used as a kind of fluorescence sensor material due to lack of luminescent group. To make up for this lack of features, in this paper, achiral 9,9‐dipropynylfluorene‐2‐methanol (DODH) as a starting material was used to construct a luminescent oligomer (poly‐(S)‐DODH) via asymmetric coupling reaction, which exhibits good emission ability but low optical rotation value. Then, the oligomer was grafted onto chiral lactide (LLA) to produce polylactic acid side chain, giving a high optically active graft oligomer poly‐(S)‐DODH‐LAA with molecular brush structure. This graft oligomer as a fluorescence sensor for several chiral enantiomers was investigated. Although the oligomer itself almost showed no recognition ability for all these enantiomers, interestingly, the recognition performance for pyroglutamic acid enantiomer was obviously enhanced in the presence of Cu2+.
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