Synthesis of new mesomorphic terphenyl derivatives: the influence of terphenylene and functional fragments on the mesomorphic properties and ligand exchange on quantum dots

Formation of the Inorganic and Organic Shells on the Surface of CdSe Quantum Dots

“…The reason for such a ligand exchange is described in the Introduction part. As we have shown in ref with FTIR spectra, the treatment of QDs in sols with TERPh-COOH results in the substitution of OA acid on the surface of QDs, whereas the aromatic acid fragments appear (Scheme ). However, questions arise about what ligands and in what amount are present at the surface after the ligand exchange.…”

“…Note that the structure identified by FTIR 37 changes substantially after the ligand exchange reaction (Scheme 2). The presence of the carboxylic group in TERPh-COOH is confirmed by an intense band at 1699 cm −1 induced by stretching of the CO group in the FTIR spectrum.…”

The role of terphenyl-containing carboxylic acid in the oligomerization of aryl vinyl ketone

“…At about 100 °C, which corresponds to a liquid crystal phase of TERPh-VK 16 the change in the molecular structure is seen in the IR spectra (Fig. 5a).…”

“…[13][14][15] Previously, we synthesized new anisotropic terphenyl derivatives and demonstrated that they form smectic and nematic phases in a wide temperature range, namely 8-((4 00 -((1R,4S)-4butylcyclohexyl) -2 0 -chloro-[1,1 0 ,4 0 ,1 00 -terphenyl]-4-yl)oxy)oct-1en-3-one (TERPh-VK) and 6-((4 00 -((1R,4S)-4-butylcyclohexyl)-2 0chloro-[1,1 0 :4 0 ,1 00 -terphenyl]-4-yl)oxy) hexanoic acid (TERPh-COOH). 16 As for TERPh-VK, the double bond disappears under heating. 16 At the same time, we have shown in ref.…”

“…Taking into account the presence of the vinyl group in TERPh-VK capable of the opening of the CQC double bond under heating 16 we have analyzed the variations of its molecular structure during heating (Fig. 5a).…”