A luminescent-water soluble inorganic co-crystal for a selective pico-molar range arsenic(iii) sensor in water medium

The water solution of an intriguing luminescent 'Inorganic Co-crystal' of Cu(II) monomeric and dimeric units shows extremely selective sensing ability towards inorganic arsenic(III) in water medium in the pico-molar concentration range even in the presence of other cations.