Media type: E-Article Title: Headgroups versus symmetry in congruent ion pairs: which one does the job in mesomorphic aryl guanidinium and aryl imidazolium sulphonates? Contributor: Butschies, Martin; Mansueto, Markus; Haenle, Johannes Christian; Schneck, Christof; Tussetschläger, Stefan; Giesselmann, Frank; Laschat, Sabine imprint: Informa UK Limited, 2014 Published in: Liquid Crystals Language: English DOI: 10.1080/02678292.2014.885600 ISSN: 0267-8292; 1366-5855 Origination: Footnote: