Facile fabrication of solid-state electrochemiluminescence sensor via non-covalent π-π stacking and covalent bonding on graphite electrode

Herein, afacile and efficient method was devel-oped for fabrication of solid-state electrochemilumines-cence (ECL)sensor via non-covalent p-p stackingand co-valent bonding on the graphite electrode (GE) surface.Theelectrode was firstly modified with 1-aminopyrenevia p-p stackingbetween GE surface and the pyrenemoiety.Thereafter astable and efficient solid-state ECLsensor was fabricated by covalent immobilization of ruth-enium(II) onto the GE surface via amidation reaction be-tween the 1-aminopyrene and bis(2,2’-bipyridyl)(4-methyl-4’-carboxypropyl-2,2’-bipyridyl) ruthenium(II)bishexafluorophosphate.The sensor has been investigatedusingtripropylamineand tetracycline as representativeanalytes,and low detection limits of 0.7 nM and 3.5 nM(S/N = 3) were reached,respectively.