Novel chromophores with excellent electro-optic activity based on double-donor chromophores by optimizing thiophene bridges

A Role of Side-Chain Regiochemistry of Thienylene–Vinylene–Thienylene (TVT) in the Transistor Performance of Isomeric Polymers

“…The synthetic routes of all intermediates and TVT-based polymers ( PI and PO ) are shown in Figure . First, the compounds 2-formyl-3-hexyl­thiophene ( 1 ) and 2-formyl-4-hexylthiophene ( 4 ) were synthesized using different formylation methods to obtain position selectivity according to the procedure reported in the literature. , A McMurry-type reduction coupling was performed using the respective aldehydes and a low-valent titanium reagent (TiCl 4 /Zn) to afford the key intermediates ( E )-1,2-bis­(3-hexyl­thiophen-2-yl)­ethene ( 2 ) and ( E )-1,2-bis­(4-hexyl­thiophen-2-yl)­ethene ( 5 ), respectively. Finally, each TVT-based compound was converted into the corresponding bis-stannylated monomer ( 3 and 6 ) via lithiation and subsequent treatment with trimethyl tin chloride.…”

Novel poly(aryl ether ketone) with electro-optic chromophore side chains for light modulators

“…The synthesis of chromophore TCF-G and TCP-G has been reported in our earlier papers [28,38]. They are both synthesized by a Knoevenagel condensation reaction [17,19].…”

“…This resulted in better film-forming ability, higher electro-optics coefficients and better long-term stability. Quantum chemical simulations of the second order polymers have been reported in the past two decades, it is very difficult to find organic second order nonlinear optical materials that have both large electro optic coefficients and long-term stability [13][14][15][16][17][18]. Due to the large EO coefficients of about 42-78 pm/V (all the EO parameters are given at wavelength 1.3 µm) at low chromophore loading density (10 wt%), chromophore CLDs have been widely studied, but their thermal decomposition temperature is very low (~180 °C) [53].…”

The design and synthesis of nonlinear optical chromophores containing two short chromophores for an enhanced electro-optic activity

“…Introducing sterically hindered groups was usually the effective way to weaken the dipole moment between molecules, thereby increasing the electro-optic coefficient. Various isolation groups such as silane, 17 various aromatic structures 18,19 and alkane 20,21 were introduced to different part of the chromophores to increase the electro-optic coefficient by steric effect. At the same time, other properties of the chromophore, such as solvability, thermal stability and poling orientation stability were enhanced accordingly.…”