122nd General Meeting of the KCS

Type Poster Presentation
Area Electrochemistry
Room No. Grand Ballroom
Time 10월 19일 (금요일) 11:00~12:30
Code ELEC.P-467
Subject Electrochemical and Optical Characteristics of Water Soluble Phosphate-Functionalized Naphthalene- and Perylene-Diimide and Its Zirconium Bisphosphate Multilayer Films
Authors Yeong Il Kim*, Hyun-Kwan Shim*
Department of Chemistry, Pukyong National University, Korea
Abstract The electrochemical and optical properties of phosphate-functionalized naphthalene and perylene diimides, that are N,N’-bis(ethyldihydrogen phosphate)-1,4,5,8-naphthalene bis(dicarboximide) (EPNDI) and N.N’-bis(ethyldihydrogen phosphate)-3,4,9,10-perylene bis(dicarboximide) (EPPDI), were investigated in aqueous solutions and thin films. The thin films of these materials were prepared layer-by-layer on ITO substrate by the alternate coordination with zirconium ion and the functionalized phosphate. EPNDI could exist as monomeric form in aqueous solution regardless of solution pH, while EPPDI was in dimeric or polymeric form and dependent on pH. The redox properties of both EPNDI and EPPDI were strongly dependent on pH of the electrolyte solution whether they are in solution or thin films on ITO. The electron transfers between EPNDI/EPPDI and ITO electrode were catalyzed by proton. The mediated electron transfer of EPNDI/EPPDI thin films into a redox couple in solution were also investigated.
E-mail ykim@pknu.ac.kr