| Title | Pressure-induced emission band separation of the hybridized local and charge transfer excited state in a TPE-based crystal |
| Authors | Liu, Xuedan Li, Aisen Xu, Weiqing Ma, Zhiyong Jia, Xinru |
| Affiliation | Beijing Univ Chem Technol, Coll Chem Engn, Beijing State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China. Jilin Univ, Coll Phys, Inst Theoret Chem, State Key Lab Supramol Struct & Mat, Changchun 130012, Jilin, Peoples R China. Peking Univ, Coll Chem & Mol Engn, Minist Educ, Key Lab Polymer Chem & Phys,Beijing Natl Lab Mol, Beijing 100871, Peoples R China. |
| Keywords | AGGREGATION-INDUCED EMISSION MECHANOCHROMIC PROPERTIES HYDROSTATIC-PRESSURE TETRAPHENYLETHENE FLUORESCENCE SINGLE SWITCH LUMINOGENS MECHANOFLUOROCHROMISM ELECTROLUMINESCENCE |
| Issue Date | 2018 |
| Publisher | PHYSICAL CHEMISTRY CHEMICAL PHYSICS |
| Citation | PHYSICAL CHEMISTRY CHEMICAL PHYSICS. 2018, 20(19), 13249-13254. |
| Abstract | We herein report a newly synthesized simple molecule, named TPE?C4, with twisted D-A structure. TPE?C4 showed two intrinsic emission bands ascribed to the locally excited (LE) state and the intramolecular charge transfer (ICT) state, respectively. In the crystal state, the LE emission band is usually observed. However, by applying hydrostatic pressure to the powder sample and the single crystal sample of TPE?C4, dual-fluorescence (445 nm and 532 nm) was emerged under high pressure, owing to the pressure-induced emission band separation of the hybridized local and charge transfer excited state (HLCT). It is found that the emission of TPE?C4 is generally determined by the ratio of the LE state to the ICT state. The ICT emission band is much more sensitive to the external pressure than the LE emission band. The HLCT state leads to a sample with different responsiveness to grinding and hydrostatic pressure. This study is of significance in the molecular design of such D-A type molecules and in the control of photoluminescence features by molecular structure. Such results are expected to pave a new way to further understand the relationship between the D-A molecular structure and stimuli-responsive properties. |
| URI | http://hdl.handle.net/20.500.11897/524004 |
| ISSN | 1463-9076 |
| DOI | 10.1039/c8cp02096e |
| Indexed | SCI(E) |
| Appears in Collections: | å å¦ä¸ å å å·¥ç¨ å¦é ¢ 高分子化学与物理教育部重点实验室 |
