Regular ArticleWhy do Physicists Love Charge-Transfer Salts?
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Cited by (32)
Synthesis, spectroscopic, crystal structure, thermal and optical studies of a novel proton transfer complex: 2-Methyl-8-hydroxyquinoliniumpicrate
2019, Journal of Molecular StructureCitation Excerpt :On the other hand, the proton transfer (PT) molecular complexes are found to be more stable by the strong ionic interaction between cationic and anionic moieties in the complexes. Both EDA and PT complexes has been an attractive and realistic target for material scientists due to their superconductivity [4], strong electron‒phonon interactions [5], optical applications [6] and photovoltaic properties [7]. In addition, the CT complexes and their various types of interactions have also played an important role in various chemical and biological processes like stabilizing biomolecular structures [8], transferring ions through lipophilic membranes [9] and controlling the speed of enzymatic reaction as well as drug delivery action [10,11].
Study of charge transfer interaction modes in the mixed Donor-Acceptor cocrystals of pyrene derivatives and TCNQ: A combined structural, thermal, spectroscopic, and hirshfeld surfaces analysis
2018, Journal of Solid State ChemistryCitation Excerpt :A review of the previous literature reveals that the attractive features of the CT complexes are associated with the arrangement of D-A that are linked by CT interactions and hydrogen bonding along with other non-covalent interactions [9]. CT cocrystals made up of an electron donor and electron acceptor molecules in either mixed stacking mode or in segregated fashion with a defined molar proportion; therefore, tuning the stacking modes between donor and acceptor results in the preparation of functional materials with controlled structure and promising properties [10–17]. In this regard, careful selection of D-A pair from the vast library of organic compounds is fundamental criteria for achieving anticipated supramolecular assemblies with tailor-made characteristics for many supramolecular chemists.
New crystal packing arrangements in radical cation salts of BEDT-TTF with [Cr(NCS)<inf>6</inf>]<sup>3-</sup> and [Cr(NCS)<inf>5</inf>(NH<inf>3</inf>)]<sup>2-</sup>
2015, PolyhedronCitation Excerpt :The organic donor molecule BEDT-TTF 1 has provided a large number of such salts, usually in the form of segregated stacks of donor and anion molecules. Typically a simple anion such as Cl−, linear I3−, tetrahedral BF4−, or octahedral PF6− produce an array of packing arrangements of the donor molecules which leads to a variety of conducting properties such as metals, semiconductors, and superconductors [1–4]. The inclusion of a layer of anions introduces the possibility of multifunctionality.
Synthesis of new chiral organosulfur donors with hydrogen bonding functionality and their first charge transfer salts
2013, TetrahedronCitation Excerpt :TTF 1 and BEDT-TTF 2 have been at the forefront for the preparation of electrically conducting molecular systems, the former providing the first example of an organic metal in its complex with TCNQ,1 and the latter providing a large number of salts with varying electronic properties, including superconductivity.2 Considerable numbers of substituted derivatives of TTF and BEDT-TTF have been reported,3,4 and the former especially have found potential applications as molecular switches,5,6 sensors,5,7 field effect transistors8 and molecular electronics9 as well as in the preparation of conducting radical cation salts and fibres.10 Two recent research themes in this area have been the installation of chirality into the donor molecules and the attachment of groups with hydrogen bonding potential.
Solvent-drop assisted mechanochemical synthesis of the black and green polymorphs of the tetrathiafulvalene-chloranil charge transfer salt
2011, Synthetic MetalsCitation Excerpt :One-dimensional structures are not stable and the strong correlations above mentioned induce a symmetry break in charge or spin ordering at low temperatures [2]. A variety of low temperature ground states have been observed in charge transfer salts, and is possible to tune them by the use of magnetic fields, temperature, pressure or “chemical pressure” [1]. The green polymorph of tetrathiafulvalene–chloranil (TTF–CA) has been extensively studied since is a prototype material used to understand the neutral to ionic transition in one-dimensional TTF-based charge transfer salts [2].
New chiral organosulfur donors related to bis(ethylenedithio) tetrathiafulvalene
2010, TetrahedronCitation Excerpt :In the former, stacks of donors on either side of the anions are related by a centre of symmetry in the racemate and by a two-fold rotation axis in the enantiopure salt but the salts have similar conductivities;8 however, in the latter the enantiopure material shows a room temperature conductivity an order of magnitude higher than for the racemate, due to disorder in the racemate,11 however no suitable system has been found so far in which chirality is strongly expressed in the packing arrangement. Other approaches for incorporating chirality into such salts are to use either a chiral anion such as tris(oxalato)Cr(III)13 or [Sb2(l-tartrate)2]2–14 or to introduce an enantiopure solvent molecule in the salt’s crystal structure.15 The arrangement of donors in a helical arrangement is a particularly attractive goal, and has been partially achieved by supramolecular organisation of donor pairs in the TTF mellitate salt.16
- 1
To whom correspondence should be addressed. E-mail: [email protected]. Current address: National High Magnetic Field Laboratory (MST-NHMFL), TA-35, MS-E536, Los Alamos National Laboratory, LosAlamos, New Mexico 87545.