Direct observation of excited state conversion in solid state from a TICT-Type mechanochromic luminogen

Jianai Chen; Sijie Tan; Yue Yu; Shitong Zhang; Weijun Li; Qingbao Song; Yujie Dong; Cheng Zhang; Wai Yeung Wong

doi:10.1016/j.jlumin.2021.118179

Direct observation of excited state conversion in solid state from a TICT-Type mechanochromic luminogen

Jianai Chen, Sijie Tan, Yue Yu, Shitong Zhang, Weijun Li, Qingbao Song, Yujie Dong, Cheng Zhang, Wai Yeung Wong

Research output: Journal article publication › Journal article › Academic research › peer-review

10 Citations (Scopus)

Abstract

A coplanar donor-acceptor (D-A) structure in single crystal is directly observed for TICT-Type DPA-PYZ, which corresponds to a coplanar localized excited (LE) state. The conversion between coplanar LE and twisted intramolecular charge transfer (TICT) excited state in the solid state can be achieved through the change of the D-A twist angle between ~0° and ~30° during grinding, heating and solvent fumigation processes. This twist angle change between donor and acceptor was proved by the Raman, FT-IR spectroscopy and X-ray crystallographic analysis as well as theoretical calculation. This research provides the clear evidence for the conversion between coplanar LE and TICT excited states of D-A molecules in solid state and contributes much to the deep understanding of stimulus-response behavior of fluorescent D-A molecular solids from the viewpoint of excited state control.

Original language	English
Article number	118179
Journal	Journal of Luminescence
Volume	237
DOIs	https://doi.org/10.1016/j.jlumin.2021.118179
Publication status	Published - Sept 2021

Keywords

Coplanar D-A structure
Excited state conversion
Mechanochromism
Solid-state luminescence
TICT
Triphenylamine

ASJC Scopus subject areas

Biophysics
Atomic and Molecular Physics, and Optics
General Chemistry
Biochemistry
Condensed Matter Physics

More information

10.1016/j.jlumin.2021.118179

http://hdl.handle.net/10397/95481

Cite this

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title = "Direct observation of excited state conversion in solid state from a TICT-Type mechanochromic luminogen",

abstract = "A coplanar donor-acceptor (D-A) structure in single crystal is directly observed for TICT-Type DPA-PYZ, which corresponds to a coplanar localized excited (LE) state. The conversion between coplanar LE and twisted intramolecular charge transfer (TICT) excited state in the solid state can be achieved through the change of the D-A twist angle between ~0° and ~30° during grinding, heating and solvent fumigation processes. This twist angle change between donor and acceptor was proved by the Raman, FT-IR spectroscopy and X-ray crystallographic analysis as well as theoretical calculation. This research provides the clear evidence for the conversion between coplanar LE and TICT excited states of D-A molecules in solid state and contributes much to the deep understanding of stimulus-response behavior of fluorescent D-A molecular solids from the viewpoint of excited state control.",

keywords = "Coplanar D-A structure, Excited state conversion, Mechanochromism, Solid-state luminescence, TICT, Triphenylamine",

author = "Jianai Chen and Sijie Tan and Yue Yu and Shitong Zhang and Weijun Li and Qingbao Song and Yujie Dong and Cheng Zhang and Wong, {Wai Yeung}",

note = "Funding Information: Thanks to financial supports from National Natural Science Foundation of China ( 51603185 , 51673174 , 51803071 , 21875219 ) and Zhejiang Provincial Natural Science Foundation of China ( LY19E030006 , LQ19E030016 , LZ17E030001 ). W.-Y. W. would like to thank the National Natural Science Foundation of China ( 51873176 ), Hong Kong Research Grants Council ( PolyU 153058/19P and C6009-17G), Hong Kong Polytechnic University (1-ZE1C) and the Endowed Professorship in Energy from Ms. Clarea Au (847S) for the financial support. Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",

year = "2021",

month = sep,

doi = "10.1016/j.jlumin.2021.118179",

language = "English",

volume = "237",

journal = "Journal of Luminescence",

issn = "0022-2313",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Direct observation of excited state conversion in solid state from a TICT-Type mechanochromic luminogen

AU - Chen, Jianai

AU - Tan, Sijie

AU - Yu, Yue

AU - Zhang, Shitong

AU - Li, Weijun

AU - Song, Qingbao

AU - Dong, Yujie

AU - Zhang, Cheng

AU - Wong, Wai Yeung

N1 - Funding Information: Thanks to financial supports from National Natural Science Foundation of China ( 51603185 , 51673174 , 51803071 , 21875219 ) and Zhejiang Provincial Natural Science Foundation of China ( LY19E030006 , LQ19E030016 , LZ17E030001 ). W.-Y. W. would like to thank the National Natural Science Foundation of China ( 51873176 ), Hong Kong Research Grants Council ( PolyU 153058/19P and C6009-17G), Hong Kong Polytechnic University (1-ZE1C) and the Endowed Professorship in Energy from Ms. Clarea Au (847S) for the financial support. Publisher Copyright: © 2021 Elsevier B.V.

PY - 2021/9

Y1 - 2021/9

N2 - A coplanar donor-acceptor (D-A) structure in single crystal is directly observed for TICT-Type DPA-PYZ, which corresponds to a coplanar localized excited (LE) state. The conversion between coplanar LE and twisted intramolecular charge transfer (TICT) excited state in the solid state can be achieved through the change of the D-A twist angle between ~0° and ~30° during grinding, heating and solvent fumigation processes. This twist angle change between donor and acceptor was proved by the Raman, FT-IR spectroscopy and X-ray crystallographic analysis as well as theoretical calculation. This research provides the clear evidence for the conversion between coplanar LE and TICT excited states of D-A molecules in solid state and contributes much to the deep understanding of stimulus-response behavior of fluorescent D-A molecular solids from the viewpoint of excited state control.

AB - A coplanar donor-acceptor (D-A) structure in single crystal is directly observed for TICT-Type DPA-PYZ, which corresponds to a coplanar localized excited (LE) state. The conversion between coplanar LE and twisted intramolecular charge transfer (TICT) excited state in the solid state can be achieved through the change of the D-A twist angle between ~0° and ~30° during grinding, heating and solvent fumigation processes. This twist angle change between donor and acceptor was proved by the Raman, FT-IR spectroscopy and X-ray crystallographic analysis as well as theoretical calculation. This research provides the clear evidence for the conversion between coplanar LE and TICT excited states of D-A molecules in solid state and contributes much to the deep understanding of stimulus-response behavior of fluorescent D-A molecular solids from the viewpoint of excited state control.

KW - Coplanar D-A structure

KW - Excited state conversion

KW - Mechanochromism

KW - Solid-state luminescence

KW - TICT

KW - Triphenylamine

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U2 - 10.1016/j.jlumin.2021.118179

DO - 10.1016/j.jlumin.2021.118179

M3 - Journal article

AN - SCOPUS:85106214637

SN - 0022-2313

VL - 237

JO - Journal of Luminescence

JF - Journal of Luminescence

M1 - 118179

ER -

Direct observation of excited state conversion in solid state from a TICT-Type mechanochromic luminogen

Abstract

Keywords

ASJC Scopus subject areas

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