Chromogenic azole diazothiacrown ethers

Solvents effects on the self-assemblies of 5,5′-bis(3-hydroxyphenyldiazo)-dipyrromethane

“…Various structures, from 1D to 3D, have been generated by a-carbonyl-functionalized pyrrole compounds through hydrogen bonds [7][8][9][10][11][12][13]. Over the past decade, azopyrrole dyes have been attracting much attention because of their rapidly increasing role in the design of advanced materials and devices [14][15][16][17][18][19][20][21][22][23]. On the other hand, the self-assembly of azopyrrole through the hydrogen bonds between pyrrole NH and azo nitrogen atom drew our attention.…”

Crystal structure of 2-{5-[2-(2-hydroxyphenyl)diazen-1-yl]-1-methylpyrrol-2-yl}phenol methanol monosolvate

“…A search in the Cambridge Structural Database (Version 5.38; Groom et al, 2016) returned 45 entries for azopyrrole derivatives, including three entries for N-vinylphenylazopyrrole (Trofimov et al, 2006;Rusakov et al, 2007), four entries for mono-or bisazopyrroles (Li et al, 2009), two entries for azo calix[4]pyrroles (Nishiyabu et al, 2006), five entries for pyrrole-azocrown ethers (Wagner-Wysiecka et al, 2011;Szczygelska-Tao et al, 2008), two entries for azopyrrole boron difluoride complexes (Li et al, 2009;Lee et al, 2012), ten entries for metal complexes (Li et al, 2008;Li, & Dolphin, 2011;Yin et al, 2012;Zhang et al, 2015;Ghorui et al, 2016 Table 1 Hydrogen-bond geometry (Å , ).…”