Zhao, Jiang Lin, Tomiyasu, Hirotsugu, Ni, Xin-Long, Zeng, Xi, Elsegood, Mark R. J., Redshaw, Carl, Rahman, Shofiur, Georghiou, Paris E., Yamato, Takehiko, "Synthesis and evaluation of a novel ionophore based on a thiacalix[4]arene derivative bearing imidazole units", New journal of chemistry, 2014