The fluorescence quenching of 3-(2-naphthoxyl)-1-aminopropane (1), 3-(1-naphthoxyl)-1-aminopropane (2), and 3-(2-dibenzofuranoxyl)-1-aminopropane (3) by β-cyclodextrin (β-CD)-bound viologens is much more efficient than that by dimethyl viologen. The binding studies of the guests with β-CD and lifetime measurements of the quenching indicated that this is due to the static quenching in complexes formed by inclusion of the aromatic guests into β-CD moiety of the β-CD- viologens.
3-(2-
萘氧基)-1-
氨基
丙烷(1)、3-(1-
萘氧基)-1-
氨基
丙烷(2)和3-(2-
二苯并呋喃氧基)-1-
氨基
丙烷(3)的荧光淬灭,通过β-
环糊精(β-CD)结合的紫精化合物进行,比通过二
甲基紫精化合物进行的淬灭效率要高得多。客体与β-CD的结合研究以及淬灭的寿命测量表明,这是由于在β-CD-紫精化合物中,芳香性客体被包合形成复合物时产生的静态淬灭。