title: Nanofibers of hydrogen-bonded two-component gel with closely connected p- and n-channels and photoinduced electron transfer.
abstract: An D-A-D gelator (DTCQ) was designed and synthesized using 2,3-dimethyl-5,8-di(thiophen-2-yl)quinoxaline and N-alkyl 3-aminocarbazole units as acceptor and donor, respectively, which were linked by a single bond. The compound could gelate several solvents, such as benzyl alcohol, aniline, acetophenone, and o-dichlorobenzene, as well as self-assemble into one-dimensional (1D) nanofibers in gel phase. The absorption and infrared spectra of the gels indicated that π-π interactions between aromatic moieties, intermolecular hydrogen bonds between amide units, and van der Waals forces were the driving forces for the formation of 1D self-assemblies and gel. DTCQ gel was red and emits red fluorescence because it has a strong absorption band at 487 nm and an emissive band at 620 nm. Moreover, DTCQ and a fullerene carboxylic acid formed two-component gel, in which the two compounds developed a hydrogen bond complex and self-assembled into 1D nanofibers with closely connected p- and n-channels. The nanofibrous xerogel film can rapidly generate a photocurrent under visible-light radiation through electron transfer from the gelator to fullerene, and then, the excellent exciton separation and charge transfer to two electrodes.
authors.affiliation: State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , 2699# Qianjin Street, Changchun 130012, P. R. China.
authors.forename: Pengchong
authors.initials: P
authors.lastname: Xue
authors.forename: Panpan
authors.initials: P
authors.lastname: Wang
authors.forename: Boqi
authors.initials: B
authors.lastname: Yao
authors.forename: Jiabao
authors.initials: J
authors.lastname: Sun
authors.forename: Peng
authors.initials: P
authors.lastname: Gong
authors.forename: Zhenqi
authors.initials: Z
authors.lastname: Zhang
authors.forename: Chong
authors.initials: C
authors.lastname: Qian
authors.forename: Ran
authors.initials: R
authors.lastname: Lu
keywords: electron transfer; fullerene; nanofibers; organogels; photocurrent; π-conjugated fluorophores