Journal
TETRAHEDRON
Volume 56, Issue 36, Pages 7045-7049Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0040-4020(00)00528-7
Keywords
chemosensor; lanthanide; luminescence; sensitization; crown ether
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The synthesis and photophysical behavior of a luminescent chemosensor for the early lanthanide elements is described. The sensor is a 1,4-diphenylethynyl-benzene chromophore having 18-crown-6 moieties bound to the outer phenyl rings. The chromophore is luminescent and the emission is quenched by lanthanide (Ln(3+)) ions with larger ionic radii and existing f-f transitions (Ce3+, Pr3+ and Nd3+). Alkali, alkaline earth ions and lanthanides with smaller radii (Ge3+, Tb3+, Dy3+, and Yb3+) do not affect the emission. (C) 2000 Elsevier Science Ltd. All rights reserved.
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