TY - JOUR
T1 - Pressure-induced emission enhancement by restricting chemical bond vibration
AU - Fu, Zhiyuan
AU - Liu, Haichao
AU - Zhao, Jingyi
AU - Zhang, Xiangyu
AU - Zheng, Xiaoyan
AU - Yang, Bing
AU - Yang, Xinyi
AU - Wang, Kai
AU - Zou, Bo
N1 - Publisher Copyright:
© The Royal Society of Chemistry 2021.
PY - 2021/11/7
Y1 - 2021/11/7
N2 - In this work, we found that the pressure-induced emission enhancement (PIEE) phenomenon can be produced by the restriction of intramolecular chemical bond vibration, which differs from the mechanism of restricting intramolecular motion (RIM). Dibenzo[b,d]thiophene 5,5-dioxide (DBTS) is an aggregation-induced emission enhancement (AIEE) material. In the crystal state of DBTS, the high pressure strengthens intermolecular C-H⋯O S hydrogen bonds, which greatly restricts the vibration of C-H and S O bonds and then rigidifies the molecular skeleton, thereby suppressing the non-radiative process and promoting emission enhancement.In situhigh-pressure infrared spectroscopy and angle-dispersive X-ray diffraction analysis combined with reorganization energy and Hirshfeld surface theory calculation provide clear evidence that the restriction of the deformation vibration C-H bonds plays an essential role in PIEE, and S O bonds can act as the powerful controller that enhances intermolecular C-H⋯O S hydrogen bonds. This study introduces a new AIEE and PIEE fluorophore and provides deep insights into the influence of intermolecular interactions on intramolecular chemical bond vibration and luminescence, which will play an important role in the development of precision optical sensors.
AB - In this work, we found that the pressure-induced emission enhancement (PIEE) phenomenon can be produced by the restriction of intramolecular chemical bond vibration, which differs from the mechanism of restricting intramolecular motion (RIM). Dibenzo[b,d]thiophene 5,5-dioxide (DBTS) is an aggregation-induced emission enhancement (AIEE) material. In the crystal state of DBTS, the high pressure strengthens intermolecular C-H⋯O S hydrogen bonds, which greatly restricts the vibration of C-H and S O bonds and then rigidifies the molecular skeleton, thereby suppressing the non-radiative process and promoting emission enhancement.In situhigh-pressure infrared spectroscopy and angle-dispersive X-ray diffraction analysis combined with reorganization energy and Hirshfeld surface theory calculation provide clear evidence that the restriction of the deformation vibration C-H bonds plays an essential role in PIEE, and S O bonds can act as the powerful controller that enhances intermolecular C-H⋯O S hydrogen bonds. This study introduces a new AIEE and PIEE fluorophore and provides deep insights into the influence of intermolecular interactions on intramolecular chemical bond vibration and luminescence, which will play an important role in the development of precision optical sensors.
UR - http://www.scopus.com/inward/record.url?scp=85118639766&partnerID=8YFLogxK
U2 - 10.1039/d1tc04132k
DO - 10.1039/d1tc04132k
M3 - Article
AN - SCOPUS:85118639766
SN - 2050-7526
VL - 9
SP - 14578
EP - 14582
JO - Journal of Materials Chemistry C
JF - Journal of Materials Chemistry C
IS - 41
ER -