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http://hdl.handle.net/10397/95481
Title: | Direct observation of excited state conversion in solid state from a TICT-Type mechanochromic luminogen | Authors: | Chen, J Tan, S Yu, Y Zhang, S Li, W Song, Q Dong, Y Zhang, C Wong, WY |
Issue Date: | Sep-2021 | Source: | Journal of luminescence, Sept. 2021, v. 237, 118179 | 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 |
Publisher: | Elsevier | Journal: | Journal of luminescence | EISSN: | 0022-2313 | DOI: | 10.1016/j.jlumin.2021.118179 | Rights: | © 2021 Elsevier B.V. All rights reserved. © 2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/. The following publication Chen, J., et al. (2021). "Direct observation of excited state conversion in solid state from a TICT-Type mechanochromic luminogen." Journal of Luminescence 237: 118179 is available at https://dx.doi.org/10.1016/j.jlumin.2021.118179. |
Appears in Collections: | Journal/Magazine Article |
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Wong_Direct_Observation_Excited.pdf | Pre-Published version | 3.22 MB | Adobe PDF | View/Open |
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