title: Organogelators based on TTF supramolecular assemblies: synthesis, characterization, and conductive property.
abstract: A closely related family of organogelators 1-2 appended one or two electroactive tetrathiafulvalene (TTF) residues, has been designed and readily synthesized by Sonogashira reactions. These compounds can gelate a variety of organic solvents in view of multiple intermolecular interactions, and compounds 2 with two TTF subunits exhibit higher gelation ability than their corresponding 1. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) investigation of the xerogels from toluene gave a visual image showing that fibrillar aggregates are entangled in three-dimensional network structures. The columnar TTF cores stacking in the fiber, evidenced by the mixed-valence states absorption at around 2000 nm in ultraviolet-visible-near-infrared (UV-vis-NIR) spectra, provide an efficient pathway for the electron conduction. Upon oxidized by iodine, these xerogels exhibit semiconductive behaviors with moderate levels of conductivity. Additionally, the electrical conductivity of doped-xerogels 2 is 1 order of magnitude higher than that of 1 under identical conditions.
authors.affiliation: Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, the Chinese Academy of Sciences, Beijing 100190, PR China.
authors.forename: Xiao-Jun
authors.initials: XJ
authors.lastname: Wang
authors.forename: Ling-Bao
authors.initials: LB
authors.lastname: Xing
authors.forename: Wei-Ning
authors.initials: WN
authors.lastname: Cao
authors.forename: Xu-Bing
authors.initials: XB
authors.lastname: Li
authors.forename: Bin
authors.initials: B
authors.lastname: Chen
authors.forename: Chen-Ho
authors.initials: CH
authors.lastname: Tung
authors.forename: Li-Zhu
authors.initials: LZ
authors.lastname: Wu
mesh_terms: D004553:Electric Conductivity; D005782:Gels / Q000737:chemistry; D006571:Heterocyclic Compounds / Q000138:chemical synthesis* / Q000737:chemistry*; D046911:Macromolecular Substances / Q000138:chemical synthesis / Q000737:chemistry; D015394:Molecular Structure; D010316:Particle Size; D013237:Stereoisomerism; D013499:Surface Properties
chemical_list: D005782:Gels; D006571:Heterocyclic Compounds; D046911:Macromolecular Substances; C063887:tetrathiafulvalene