Photophysics of 4-dimethylamino-4′-cyanostilbene and 4-azetidinyl-4′-cyanostilbene. Time-resolved fluorescence and trans-cis photoisomerisation

Syntheses and structures of new luminescent B(III) complexes: BPh2(2-(2-pyridyl)naphtho[b]imidazole) and BF2(2-(2-pyridyl)naphtho[b]imidazole)

“…The other intense band centered at 344 nm shows a vibrational separation of 1300 cm À1 with the m 0,0 transition at 3.03 · 10 4 cm À1 . This lower energy band possesses a reasonably high absorptivity (e $ 10 4 dm 3 mol À1 cm À1 ) and a bathochromic shift with increasing polarity of solvent, which are consistent with the intramolecular charge transfer (ICT) character for the concerned p-p* transition involving the filled p orbital (HOMO) located on the imidazol ring and the unoccupied p* orbital (LUMO) located on the quinoly ring [17][18][19][20][21][22][23]. For the absorption spectrum of 1 (Fig.…”

Fate of photoexcited trans-aminostilbenes

“…The same studies on trans-4-(N, N-dimethylamino) stilbene (4DS) and the corresponding model compounds 4DS-B1 and 4DS-B2 also led to the same TICT model for 4DS [46]. However, the above TICT model for 4DCS and 4DS has been severely challenged [47][48][49]50]. For example, the K f of 4DCS and 4DS is of little or no dependence of the solvent polarity, which conflicts with the solvation-driven TICT state formation.…”

Luminescent and Electronic Properties of Stilbenoid NCN‐Pincer PtII Compounds

“…The ρ (Onsager cavity radius) of the molecule can be estimated by numerous methods, [75,76] and in this study the radii of molecules 6 and 7 were estimated from their solid-state structures (estimated to be 4.36 and 4.39 Å, respectively). [77,78] From the slopes derived from the Lippert plot of 6 and 7 (the values in dichloromethane were excluded from the trend line, Figure 12), ∆µ was estimated to be 11 and 13 D, respectively.…”