Jump to main content
Jump to site search

Issue 5, 2011
Previous Article Next Article

Crystal structures of a benzoselenazole-derived squarylium cyanine dye and three derivatives substituted at the central squaric ring

Author affiliations

Abstract

The crystal structures of 4-[(3-hexylbenzoselenazol-3-ium-2-yl)methylidene]-2-[(3-hexyl-3H-benzoselenazol-2-ylidene)methyl]-3-oxocyclobut-1-en-1-olate and its analogues substituted at the squaric ring with O-methyl, NH-methyl and N,N-diethylamino groups have been determined using single crystal X-ray crystallography techniques. The unsubstituted squaraine dye is symmetrical and packs as a stepped ribbon array (via a C–H⋯O close interaction), which is in contrast to the slip-stacked arrangements observed in similar squaraine analogues. Each of the substituted analogues is asymmetric and pack in slightly differing slip-stacked charge-transfer columns. The NH-methyl analogue packs with a single water molecule per squaraine unit.

Graphical abstract: Crystal structures of a benzoselenazole-derived squarylium cyanine dye and three derivatives substituted at the central squaric ring

Back to tab navigation

Supplementary files

Publication details

The article was received on 16 Jul 2010, accepted on 13 Oct 2010 and first published on 05 Nov 2010


Article type: Paper
DOI: 10.1039/C0CE00420K
Citation: CrystEngComm, 2011,13, 1333-1338
  •   Request permissions

    Crystal structures of a benzoselenazole-derived squarylium cyanine dye and three derivatives substituted at the central squaric ring

    P. F. Santos, L. V. Reis, P. Almeida and D. E. Lynch, CrystEngComm, 2011, 13, 1333
    DOI: 10.1039/C0CE00420K

Search articles by author

Spotlight

Advertisements