From smectic to columnar phase of polypedal liquid crystals based on tetrathiafulvalene/1,3-dithiol-2-thione and cholesterol

2,3-(2-alkylthio)-6,7-bis(2-alkylthio)TTF: a new and green synthetic anticorrosive inhibitors for mild steel in 1.0 HCl,

“…This parameter evaluates the electronic flow in a reaction of two systems with different electronegativity's, in particular case; a metallic surface (Fe) and an inhibitor molecule. ΔN is given as follows: ΔN = χ Fe −χ in h 2(η Fe +η in h ) (15) where χFe and χinh denote the absolute electronegativity of an iron atom (Fe) and the inhibitor molecule, respectively; ηFe and ηinh denote the absolute hardness of Fe atom and the inhibitor molecule, respectively.…”

“…Furthermore, the combination of two rings of 1,3-dithiole-2-thione lead to yield tetrathiafulvalene (TTF) via cross-coupling. TTF and related heterocycles feature unique electron donating capabilities [4] for preparing charge-transfer salts [5], donors-acceptors (D-A) systems and other fields including molecular logic gates [6], molecular switches [7][8], semiconductors [9][10], conductors and superconductors [11][12], organogelators [13], liquid crystals [14][15], dyes absorbing over the whole visible spectrum [16], sensors for proton, cations or anions [17][18][19], and ligands [20][21][22][23]. The aim of the present study is to test the corrosion inhibition efficiency of TTF moiety.…”

Synthesis, mesomorphic and photophysical properties of novel triads and pentads of perylene liquid crystals with cholesterol units at the bay-position

“…On the other hand, the average number (n) of molecules in one single disk of the column could be calculated according to the following formula. 35,36 n ¼ (a 2 )(O3/2)(hrN A /M) where the notation "a" is the hexagonal lattice parameter, N A is Avogadro's number, M is the molecular mass of the compound and the density (r) of these compounds is assumed as 1 g cm À3 . 35,36 Aer calculation, the number of molecules (n) per slice was approximately 2 for compounds 9a, 9b, 10a and 10b.…”

“…35,36 n ¼ (a 2 )(O3/2)(hrN A /M) where the notation "a" is the hexagonal lattice parameter, N A is Avogadro's number, M is the molecular mass of the compound and the density (r) of these compounds is assumed as 1 g cm À3 . 35,36 Aer calculation, the number of molecules (n) per slice was approximately 2 for compounds 9a, 9b, 10a and 10b. Thus, the possible arrangement for the molecular stacking of hexagonal columns of compounds 9a, 9b, 10a and 10b were proposed as shown Fig.…”

Poly(aryl ether) Dendrons with Monopyrrolotetrathiafulvalene Unit‐Based Organogels exhibiting Gel‐Induced Enhanced Emission (GIEE)

“…In both cases, the averagen umber of dendrons in ad isk was calculated to be approximately 1b ased on calculationsu sing the Equation in ref. [23].I na ddition, considering that the molecular length was approximately 2.55 nm (based on the CPK model), the molecules have am onomolecular arrangement in the matrix. On the basis on these results, we assumedt hat the molecule might favor packing in ap arallel fashion to maximize p-stacking, hydrogen-bonding, and S···Si nteractions.…”