A stimuli-responsive double-stranded digold(i) helicate

Csaba Jobbágy, Miklós Molnár, Péter Baranyai, Andrea Hamza, Gábor Pálinkás, Andrea Deák

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

We report herein a stimuli-responsive dinuclear double stranded [Au 2L2]2+ helicate assembled from gold(i) atoms and phenyl-substituted diphosphine ligands derived from a xanthene-type backbone (L). The conformational flexibility of the dinuclear [Au2L 2]2+ helicate allows a diversity of molecular conformations and packing arrangements that lead to different solid-state emission colours. Blue (IB), bluish green (IIG) and yellow (IIIY) emitting crystalline and red emitting (IVR) amorphous forms of this double stranded [Au2L2] 2+ helicate have been obtained by slight modification of the crystallization conditions. Different molecular conformations and packing arrangements of dinuclear double stranded [Au2L2] 2+ helicates that result in different non-covalent interactions played the most significant role in tailoring the solid-state luminescence properties. On the basis of the single crystal structural data and photophysical studies, we found that an increasing number of intra- and mainly intermolecular noncovalent interactions locked and rigidified the twisted conformation of the double stranded [Au2L2]2+ helicate, and enhanced π-stacking between its aromatic units induced the red-shift in solid-state luminescence emission. The solid-state luminescence colour of this double stranded [Au2L2]2+ helicate can be switched reversibly from blue to red by external (mechanical and chemical) stimuli.

Original languageEnglish
Pages (from-to)3192-3202
Number of pages11
JournalCrystEngComm
Volume16
Issue number15
DOIs
Publication statusPublished - Apr 21 2014

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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