Zhang, Sikun; Liu, Xu; Li, Guoping; Yu, Shi; Yan, Ni; He, Gang published their research in Dyes and Pigments in 2021. The article was titled 《Novel dithienoazaborine viologen derivatives with two different π-conjugated extensions for electrochromic application》.HPLC of Formula: 15854-87-2 The article contains the following contents:
Two kinds of dithienoazaborine viologen derivatives (3a and 3b) with different π-conjugated extensions were synthesized via late-stage functionalization of dithienoazaborine precursor (BNDT). In sharp contrast to 3a (conjugation I), 3b (conjugation II) showed red-shifted absorption (∼468 nm), narrower optical bandgap (2.65 eV), and aggregation-induced emission (AIE) property. Meanwhile, 3b-based electrochromic device (ECD) showed longer switching times (21.6 s for coloration and 34.9 s for bleaching), higher color contrast ratios (21.3%), higher coloration efficiency (13.29 cm2/C), as well as better stability compared with 3a-based ECD. In addition, an electronic information (E-information) tag and a flexible ECD were assembled using 3b, further manifesting its potential applications in display areas. The research not only expands the structural types of viologen derivatives but also compares the effects of different conjugation on the properties of viologen derivatives for the first time, which may provide a feasible way to design new electrochromic materials. In the experimental materials used by the author, we found 4-Iodopyridine(cas: 15854-87-2HPLC of Formula: 15854-87-2)
4-Iodopyridine(cas: 15854-87-2) belongs to pyridine. Pyridine is very deactivated towards electrophilic substitution with respect to benzene. For this reason classical formylation, using methods such as the Gattermann or Vilsmeier reactions, are not generally successful. HPLC of Formula: 15854-87-2
Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com