Romero, Judith Barberá, Joaquín Blesa, María Jesús Concellón, Alberto Romero, Pilar Serrano, José Luis Marcos, Mercedes Liquid Crystal Organization of Calix[4]arene-Appended Schiff Bases and Recognition towards Zn 2 + Chem. sel. 10.1002/slct.201601826 2017 2017