List of Articles Crown ether Open Access Article Abstract Page Full-Text 1 - Polymeric Membrane Sensor for Potentiometric Determination of Tin(II) Ions Hossein Aghaei Masood Giahi Majjid Arvand Mehran Aghaei Open Access Article Abstract Page Full-Text 2 - Topological Analysis of Theoretical Charge Density of Alkali Metal Cations (LC, Na+, le)ICrown Ether (18e6) Complexes J. Narafpour A. Sadjadi Open Access Article Abstract Page Full-Text 3 - Sn (II) Ion- Selective Membrane Electrode based on Dibenzo-18-Crown-6 H. Aghaie M. Giahi1 Giahi M. Aghaei M. Arvand3 Open Access Article Abstract Page Full-Text 4 - Boron nitride substituted 12-crown-4 ether: Theoretical study of structural, thermochemical, and nonlinear optical properties Nasrin Zeighami Asadollah Boshra Ahmad Reza Oliaey