Structure property relationships of tunable donor-acceptor functionalized dipyrrolopyrazine derivative as selective reversible acid base sensor

Efficient Synthesis of Dipyrrolobenzenes and Dipyrrolopyrazines via Bidirectional Gold Catalysis: a Combined Synthetic and Photophysical Study

“…The employed synthesis strategy consists of an eight-step sequence with partly difficult workup procedures, resulting in low overall yields. However, initial studies of DPPs as donor–acceptor–donor molecules, self-assembled organic micro- and nano-fibers or dye-sensitized solar cells (DSSCs) showed their potential uses in optoelectronical devices. − We therefore decided to extend the scope of our methodology to para -dipyrrolopyrazines ( p DPP ). Due to lack of accessibility of a halogenated diaminopyrazine precursor, first, we focused on Buchwald–Hartwig amination followed by Sonogashira cross-coupling of readily available 2,5-dibromo-3,6-dichloropyrazine 7 (Scheme ).…”

Protonation induced redshift in the fluorescence of a pyridine derivative as a potential anti-counterfeiting agent

“…Fluorescent organic compounds are promising candidates for use in advanced functional materials. 1 Heteroatom-containing fluorescent molecules exhibit significant features in material science, mainly due to their unique properties, easy fabrication, molecular arrangement, and tunable structure. Further, pushpull chromophores 2,3 have been intensively researched for their inherent electrical and optical characteristics when compared to the other types of chromophores.…”

Proof of principle of a purine D–A–D′ ligand based ratiometric chemical sensor harnessing complexation induced intermolecular PET

“…[6][7][8] Furthermore, the D-A-D 0 structure based intramolecular chemical sensors have been reported for multimodal detection of metal cations 9 or acids. 10 The electron donating parts such as anisole and dimethylaniline are considered to be general for push-pull systems 1 and may be selected based on their strength. Purines, on the other hand, are known to be ambipolar; 11 however, using them as electron accepting units may provide several advantages.…”