In the case where an aromatic compound 301 is further added to this state, π π stacking {HEAD ~ interaction} 302 is generated between {TAIL ~ the aromatic compound} 301 and the functional chelating agent 104 since there is a π electron in the functional chelating agent 104 
In the case where an aromatic compound 301 is further added to this state , π π stacking { HEAD ~ interaction } 302 is generated between { TAIL ~ the aromatic compound } 301 and the functional chelating agent 104 since there is a π electron in the functional chelating agent 104
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH