Chemistry Letters, Vol.30, No.6, 552-553, 2001
A new type of cation responsive chromoionophore with spectral sensitivity in the near-infrared spectral range
A long wavelength absorbing cation responsive chromoionophore 1 based on the strongly pi -electron accepting dicyanovinylindane subunit and an electron donating N-phenylazacrown ether binding site was synthesized. The absorption spectra of this compound in CH3CN show strong changes in the near-infrared (NIR) spectral range upon binding of cations in the crown-ether moiety.