title: Sensor activity and logic behaviour of PET based dihydroimidazonaphthalimide diester.
abstract: An ester terminated dihydroimidazonaphthalimide as multi-functional logic device is presented. Due to the optical changes as a function of pH this simple molecule is able to act as a molecular pH metre, a digital comparator and a half-adder. It was demonstrated that the dihydroimidazonaphthalimide comparator could be used as a fundamental element of an optical device for control of pH windows. Also, the ability of the device to detect metal ions in DMF and in water/DMF (3:1, v/v) at different pHs has been evaluated by monitoring the changes of its fluorescence intensity. Among the tested metal ions (Cd(2+), Co(2+), Cu(2+), Fe(3+), Ni(2+), Pb(2+), Zn(2+), Bi(3+), Hg(2+) and Ag(+)) only Fe(3+) and Bi(3+) were efficiently detected. In water/DMF (3:1, v/v) XOR and XNOR logic gates are presented using pH and Fe(3+) as chemical inputs based on encoding binary digits of logical conventions.
authors: Department of Organic Synthesis, University of Chemical Technology and Metallurgy, 8 Kliment Ohridsky Str., 1756 Sofia, Bulgaria.
authors: Nikolai I
authors: NI
authors: Georgiev
authors: Mihail P
authors: MP
authors: Lyulev
authors: Vladimir B
authors: VB
authors: Bojinov
mesh_terms: D000042:Absorption; D002412:Cations; D004396:Coloring Agents / Q000737:chemistry; D004126:Dimethylformamide / Q000737:chemistry; D004583:Electrons; D004952:Esters / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D008027:Light; D008670:Metals / Q000737:chemistry; D053644:Naphthalimides / Q000737:chemistry*; D012996:Solutions; D013050:Spectrometry, Fluorescence; D014867:Water / Q000737:chemistry
chemical_list: D002412:Cations; D004396:Coloring Agents; D004952:Esters; D008670:Metals; D053644:Naphthalimides; D012996:Solutions; D014867:Water; D004126:Dimethylformamide