title: A modular molecular photovoltaic system based on phospholipid/alkanethiol hybrid bilayers: photocurrent generation and modulation.
abstract: Monolayer quantities of 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC), incorporated with either fullerenes or ruthenium tris(bipyridyl) (Ru(bpy)(3)(2+)) complexes, were formed on ferrocene-terminated C11-alkanethiol self-assembled monolayers (SAMs) through lipid fusion. Thus formed hybrid structures are characterized by quartz crystal microbalance, UV-vis spectroscopy, cyclic voltammetry and impedance analysis. In comparison to lipid monolayers deposited on C12-alkanethiol SAMs, photocurrent generation from these ferrocene-based structures is significantly modulated, displaying attenuated anodic photocurrents and enhanced cathodic photocurrents. While a similar trend was observed for the two photoagents studied, the degree of such modulations was always found to be greater in fullerene-incorporated bilayers. These findings are evaluated in the context of the film structure, energetics of the involved photo(electrochemical) species and cross-membrane electron-transfer processes.
authors: Department of Chemistry and Biochemistry, Auburn University, Auburn, AL 36849, USA.
authors: Hong
authors: H
authors: Xie
authors: Kai
authors: K
authors: Jiang
authors: Wei
authors: W
authors: Zhan
mesh_terms: D000473:Alkanes / Q000737:chemistry*; D056831:Coordination Complexes; D037741:Fullerenes / Q000737:chemistry; D008567:Membranes, Artificial; D009942:Organometallic Compounds / Q000737:chemistry; D010713:Phosphatidylcholines / Q000737:chemistry*; D010777:Photochemistry; D013438:Sulfhydryl Compounds / Q000737:chemistry*; D017975:Ruthenium Compounds
chemical_list: D000473:Alkanes; D056831:Coordination Complexes; D037741:Fullerenes; D008567:Membranes, Artificial; D009942:Organometallic Compounds; D010713:Phosphatidylcholines; D013438:Sulfhydryl Compounds; C547232:tris(2,2-bipyridine)-ruthenium(II); D017975:Ruthenium Compounds; C028694:1-palmitoyl-2-oleoylphosphatidylcholine