Synthesis, optical characterization and thin film preparation of 1-(pyridin-2-yl)-3-(quinolin-2-yl)imidazo[1,5-a]quinoline

Optimization of the Substitution Pattern of 1,3‐Disubstituted Imidazo[1,5‐a]Pyridines and ‐Quinolines for Electro‐Optical Applications

“…For IP2 and IP5 TFs, the spectral shape of the photoluminescence is similar to that of crystals (and solution); missing, however, are the pronounced features of vibrational modes or optical interference in the crystals. In case of IQ3 , the thin‐film emission spectrum is also red‐shifted, compared with that in solution, as seen in a previous work . For IQ4 and IQ5 , the spectrum of the TF is centered at a comparable wavelength to that found for the crystal, with its edge close to the spectrum of the solution, indicating weaker coupling in the TF.…”

“…The other TFs show a smoother, more amorphous surface morphology. IP2 at 63 nm film thickness forms a net structure found before for IQ3 at a similar thickness, which then grew to show a smooth, closed film, as shown again in Figure at 153 nm . IQ4 and IQ5 exhibit a similar surface at 160 and 82 nm, respectively.…”

“…[35] Fluorination (IQ4 and IQ5) as well as methoxylation (IP2) have shown to improve optical properties in a previous work. [21] As some characteristics of solutions and crystals of IQ3 have already been reported earlier, [15] these data are used in Table 2 and 3 as well as in Figure 2, 3, 4, 5, and 6. Table 1.…”

Synthesis of Polycyclic Quinolines by Means of Brønsted Acid Mediated Reaction of β‐(2‐Aminophenyl)‐α,β‐Ynones with Ketones

“…[1] In particular, continuous efforts are devoted to the development of clean and selective routes toward the synthesis of quinolines because of their application in medicinal chemistry [2] and their usefulness in the preparation of new materials with interesting electronic properties. [3] Classical methods for the preparation of quinolines suffer from drawbacks such as lack of generality, high reaction temperatures, long reaction times and difficulty in controlling the product selectivity. Significant progress has been made in term of functional group tolerance, excellent yields under mild reaction conditions and selectivity by means of transition-metal and/or Lewis acid catalysis.…”

“…in toluene (Table, 1, entry 1-2). Y(OTf) 3 under solvent free conditions provided the quinoline derivative 5 aa in better yield than Yb(OTf) 3 (Table 1, entries 3-4). [11] According to our previous results on the advantages of NaAuCl 4 · 2H 2 O as an alternative catalyst in sequential amination/annulation reactions, we isolated the quinoline 5 aa in 63% yield by reacting 1 a with 2 a in ethanol at room temperature in the presence of a catalytic amount of the gold(III) salt ( Table 1, entry 5).…”