4-decyloxybenzoyl and 3,4,5-tris(decyloxy)benzoyl groups, are described. Such units are linked to the TTF core through spacers of different lengths. Compound 18b exhibits a metastable discotic mesophase and constitutes the first example of a discoticliquidcrystal with a tetrathiafulvalene central core.
[EN] TETRATHIAFULVALENE DERIVATIVE, AND ORGANIC FILM AND ORGANIC TRANSISTOR USING THE SAME<br/>[FR] DÉRIVÉ DE TÉTRATHIAFULVALÈNE ET FILM ORGANIQUE ET TRANSISTOR ORGANIQUE L'UTILISANT
申请人:RICOH KK
公开号:WO2010110351A1
公开(公告)日:2010-09-30
A tetrathiafulvalene derivative expressed by General Formula (I): General Formula (I) in General Formula (I), X represents an atom selected from a carbon atom, a sulfur atom, and a nitrogen atom, and Xs may be the same or different; provided that when X is the carbon atom or the nitrogen atom, R1 to R8 each represent one of a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, and a substituted or unsubstituted thioalkoxy group, and may be the same or different; and Y1 and Y2 each represent one of structures expressed by General Formulas (II) and (III), and may be the same or different: General Formula (II) General Formula (III).
Our recent works on fused TTFâC60 dyads, (TTF)nâC60 polyads and C60âTTFâC60 dumbbell triads in which the acceptor C60 is doubly tethered to the donor tetrathiafulvalene through a rigidified cyclohexene ring are presented. This approach was developed in order to control the relative orientation as well as the distance between both donor and acceptor entities. Thereby, through-space interactions which are of great importance for photoinduced electron- and/or energy-transfer processes are expected to dominate because of the special topology of the molecules. The two linked C60 and TTF chromophores in such adducts are not only in close proximity but also have optimal orbital orientations, thus facilitating these through-space electronic interactions. These new C60-based assemblies were synthesized by [4 + 2] DielsâAlder cycloaddition
reactions. The different methodologies considered for their synthesis are discussed, their analytical, spectroscopic characterizations and electrochemical properties are also described. The selective electro-oxidation or reduction afforded the corresponding radical cation and radical anion which were characterized by EPR. These C60-based assemblies were studied for their nonlinear optical and optical limiting applications. Moreover, intramolecular photoinduced charge-separation and charge-recombination processes in a fused C60âTTFâC60 dumbbell triad which was designed to be soluble in organic solvents were investigated by time-resolved absorption and fluorescence techniques. Appreciable interaction between the C60 moiety and TTF moiety in the ground state was suggested by steady-state absorption spectra and the fluorescence spectra showed considerable interaction in the singlet excited state. The nanosecond transient absorption spectra
displayed the formation of the charge-separated radical pair C60âTTFË+âC60Ëâ, characterized by a lifetime of ca. 20 ns in benzonitrile.
A new promising π-donor of the tetrathiafulvalene series: bis(2,3-dithiabutane-1,4-diyl)tetrathiafulvalene, the symmetrical outer S-position isomer of BEDT-TTF
New functionalities are introduced into the 2-(thi)oxo-1,3-dithiole system and applied to the synthesis of the title compound.
在 2-(噻)氧代-1,3-二硫杂环系统中引入了新的官能团,并将其用于合成标题化合物。
A Novel Tetrathiafulvalene Building Block
作者:Jan Oskar Jeppesen、Kazuo Takimiya、Niels Thorup、Jan Becher
DOI:10.1055/s-1999-3473
日期:1999.5
Efficient synthesis of a novel tetrathiafulvalene building block, 2,3-bis(2-cyanoethylthio)-6,7-bis(thiocyanatomethyl)tetrathiafulvalene (7) useful for stepwise and asymmetrical bis-functionalization is reported.