TY - JOUR
T1 - Defect-sensitive crystals based on diaminomaleonitrile-functionalized Schiff base with aggregation-enhanced emission
AU - Han, Tianyu
AU - Hong, Yuning
AU - Xie, Ni
AU - Chen, Sijie
AU - Zhao, Na
AU - Zhao, Engui
AU - Lam, Jacky W.Y.
AU - Sung, Herman H.Y.
AU - Dong, Yuping
AU - Tong, Bin
AU - Tang, Ben Zhong
PY - 2013/11/28
Y1 - 2013/11/28
N2 - In this work, we report the synthesis and photophysical studies of a new luminogen, A3MN, a diaminomaleonitrile-functionalized Schiff base. A3MN is aggregation-enhanced emission (AEE)-active: the emission of A3MN is enhanced with the aggregate formation. A3MN also possesses twisted intramolecular charge transfer (TICT) properties, showing noticeable solvatofluorochromism. Interestingly, the crystals of A3MN are nonemissive; the defect areas of the crystal, however, are highly emissive, as confirmed by spectroscopic methods and confocal microscopy. By taking advantage of this defect sensitive feature, a "turn-on" type of mechanofluorochromic material is developed, the emission of which is significantly enhanced under pressure or shear force. The detection limit reaches 0.1 Newton owing to its "turn-on" nature. Such defect-induced emission also renders A3MN sensitive to various kinds of mechanical actions, including hitting, friction, sculpture, and ultrasonic vibration.
AB - In this work, we report the synthesis and photophysical studies of a new luminogen, A3MN, a diaminomaleonitrile-functionalized Schiff base. A3MN is aggregation-enhanced emission (AEE)-active: the emission of A3MN is enhanced with the aggregate formation. A3MN also possesses twisted intramolecular charge transfer (TICT) properties, showing noticeable solvatofluorochromism. Interestingly, the crystals of A3MN are nonemissive; the defect areas of the crystal, however, are highly emissive, as confirmed by spectroscopic methods and confocal microscopy. By taking advantage of this defect sensitive feature, a "turn-on" type of mechanofluorochromic material is developed, the emission of which is significantly enhanced under pressure or shear force. The detection limit reaches 0.1 Newton owing to its "turn-on" nature. Such defect-induced emission also renders A3MN sensitive to various kinds of mechanical actions, including hitting, friction, sculpture, and ultrasonic vibration.
UR - http://www.scopus.com/inward/record.url?scp=84886609774&partnerID=8YFLogxK
U2 - 10.1039/c3tc31562b
DO - 10.1039/c3tc31562b
M3 - Article
AN - SCOPUS:84886609774
SN - 2050-7526
VL - 1
SP - 7314
EP - 7320
JO - Journal of Materials Chemistry C
JF - Journal of Materials Chemistry C
IS - 44
ER -