Answers are grounded in this paper and cite their sources.
An unprecedented dual-mode optical switch by combining helicene and bis-azobenzene moieties in proximity allows for cooperative, highly diastereoselective chirochromic (92/8 to 3/97) and photochromic (>99/<1 to 19/81) switchings both in solution and in nematic LC with tunable pitches and handedness by permutation of four different metastable states.
No takes yet. Share an insight, caveat, or question.
Chen et al. (2010) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: