A fluoride-selective PCT chemosensor based on formation of a static pyrene excimer.
[reaction: see text] Calixarene-based fluorescent chemosensor 1 with two fluorogenic pyrene units conjugated to amide groups as guest recognition sites is synthesized. Complexation of F(-) by 1 causes a red shift of its absorption band to 400 nm (Deltalambda = 54 nm) and a blue shift of the excimer emission to 470 nm (Deltalambda = 12 nm) together with enhanced fluorescence intensity. The blue-shifted excimer emission is attributed to a pyrene dimer formed in the ground state, a so-called static excimer.
Kim
Sung Kuk
SK
Department of Chemistry, Dankook University, Seoul, Korea.
Bok
Ju Han
JH
Bartsch
Richard A
RA
Lee
Jin Yong
JY
Kim
Jong Seung
JS
D047250:Calixarenes / Q000138:chemical synthesis* / Q000737:chemistry; D003124:Colorimetry; D005456:Fluorescent Dyes / Q000138:chemical synthesis* / Q000737:chemistry; D005459:Fluorides / Q000032:analysis / Q000737:chemistry*; D015394:Molecular Structure; D010777:Photochemistry; D011721:Pyrenes / Q000737:chemistry*; D013053:Spectrophotometry
D005456:Fluorescent Dyes; D011721:Pyrenes; D047250:Calixarenes; D005459:Fluorides