1361989-49-2Relevant academic research and scientific papers
Photophysical Properties of Silyl-Substituted Stilbene Derivatives
Maeda, Hajime,Horikoshi, Ryo,Yamaji, Minoru,Furuyama, Taniyuki,Segi, Masahito
supporting information, p. 3410 - 3422 (2020/06/17)
The effects of silyl groups on the structural, absorption, fluorescence, and photoisomerization properties of stilbenes were investigated. In comparison to that of the parent stilbene (1), fluorescence quantum yields (Φf) of Me3Si-substituted stilbenes 2–4 and 6 in solution were higher. Derivative 5, in which Me3Si groups are present at all ortho positions of the arene moieties, did not fluoresce at room temperature. The absorption and fluorescence wavelength maxima of Me3SiMe2Si-substituted stilbene 7 occurred at longer wavelengths compared to those of the Me3Si analog 2. The results of theoretical calculations showed that this difference is a consequence of an increase in the HOMO energy of 7 caused by orbital interaction between π-system and the σ(Si–Si) orbital. Stilbene 14, with two Me3Si-C≡C groups at both para positions, had a high Φf (0.95). The calculated transition dipole moment (μ) was well correlated with Φf. Derivative 21, which contains Ph2N and Me3SiC≡C groups exhibited solvatofluorochromism because it possesses a twisted intramolecular charge transfer (TICT) excited state in which the Ph2N group and the aromatic ring are orthogonal.
Controlling conformations in alternating dialkylsilylene-spaced donor-acceptor copolymers by a cooperative thorpe-ingold effect and polymer folding
Chen, Chih-Hsien,Huang, Yen-Chin,Liao, Wei-Chih,Lim, Tsong-Shin,Liu, Kuan-Lin,Chen, I-Chia,Luh, Tien-Yau
supporting information; experimental part, p. 334 - 346 (2012/02/03)
A series of dialkylsilylene-spaced copolymers 6 and 7, which contain Me2Si and iPr2Si spacer groups, respectively, and have alternating donor and acceptor chromophores, have been designed and regioselectively synthesized by hydrosily
