Sulfur dioxide gas detection by reversible η1-SO2–Pt bond formation as a novel application for periphery functionalised metallo-dendrimers‡

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Abstract
Multimetallics such as dendrimer 3 which are functionalised at their periphery with platinum(II) metal centres reversibly absorb SO2 to yield macromolecules with significantly enhanced solubility characteristics and drastic colour changes; properties which make these compounds highly active sensors for milligram quantities of toxic SO2 gas.