Communication

Dalton Trans., 2009, 9725 - 9727, DOI: 10.1039/b918891f

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Click chemistry with lanthanide complexes: a word of caution

Graeme J. Stasiuk and Mark P. Lowe

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A propargyl-appended Eu(III) complex shows unanticipated reactivity towards NaN₃ in the Cu(I) catalysed click reaction yielding an unsubstituted 1,2,3-triazole. The resulting complex exhibits pH-responsive ¹H NMR and Eu(III) luminescence behaviour in the physiological pH range consistent with deprotonation of the NH-acidic bound triazole.

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