6533b852fe1ef96bd12aac53
RESEARCH PRODUCT
Crystal growth of new charge-transfer salts based on π-conjugated donor molecules
Gerd SchönhenseCornelius KrellnerMichael BolteJan-peter BäckerAntonia MorherrAlisa ChernenkayaSebastian Wittsubject
Materials scienceInfrared spectroscopyCrystal growth02 engineering and technologyCrystal structureCondensed Matter - Soft Condensed Matter010402 general chemistry021001 nanoscience & nanotechnologyCondensed Matter Physics01 natural sciencesTetracyanoquinodimethaneAcceptor0104 chemical sciencesElectronic Optical and Magnetic MaterialsCrystalchemistry.chemical_compoundchemistryPicenePhysics - Chemical PhysicsMoleculePhysical chemistryElectrical and Electronic Engineering0210 nano-technologydescription
Abstract New charge transfer crystals of π-conjugated, aromatic molecules (phenanthrene and picene) as donors were obtained by physical vapor transport. The melting behavior, optimization of crystal growth and the crystal structure are reported for charge transfer salts with (fluorinated) tetracyanoquinodimethane (TCNQ-Fx, x=0, 2, 4), which was used as acceptor material. The crystal structures were determined by single-crystal X-ray diffraction. Growth conditions for different vapor pressures in closed ampules were applied and the effect of these starting conditions for crystal size and quality is reported. The process of charge transfer was investigated by geometrical analysis of the crystal structure and by infrared spectroscopy on single crystals. With these three different acceptor strengths and the two sets of donor materials, it is possible to investigate the distribution of the charge transfer systematically. This helps to understand the charge transfer process in this class of materials with π-conjugated donor molecules.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-09-01 | Physica B: Condensed Matter |