A novel efficient luminescent chemosensor based on a 1, 4, 7, 10-tetraazacyclododecane (cyclen)-tethered Ru (bpy) 3 2+ derivative (Ru–cyclen) has been synthesized and characterized. It displays an ON–OFF-type luminescence change with excellent selectivity towards Cu (II) amongst 16 metal ions in 100% aqueous solution. The binding stoichiometry of Ru–cyclen with Cu 2+ was established by Job plot analysis and mass spectral evidence ...
[Furue, Masaoki; Yoshidzumi, Toshiyuki; Kinoshita, Shuichi; Kushida, Takashi; Nozakura, Shun-ichi; Kamachi, Mikiharu Bulletin of the Chemical Society of Japan, 1991 , vol. 64, # 5 p. 1632 - 1640]