English to Italian Social Sciences Chemistry; Chem Sci/Eng

All the intermediates and the photochrome 1 were characterized
by 1H NMR and UV-vis spectroscopies and mass spectrometry.
To follow the electronic effect of the different fragments of the
photochrome upon the binding unit we measured the absorption
and fluorescence spectra and the oxidation potentials of the
photochrome 1, of its analogue 4 with the protected and hence
ineffective electron-accepting group (the N,N-diethanol group should
reproduce the electronic property of the azacrown receptor), and
of the ionophore branch 3 (Table 1).