A water soluble copper(<scp>ii</scp>) complex as a HSO₄⁻ ion selective turn-on fluorescent sensor applicable in living cell imaging

Abstract

A water soluble non-fluorescent biofriendly cell permeable structurally characterised copper(<sc>ii</sc>) complex (<bold>1</bold>) selectively senses HSO₄⁻ ions as low as 3.18 × 10⁻⁷ M in water : DMSO (9 : 1, v/v) HEPES buffer at biological pH.