Johansson, Patrik G. et al. published their research in Inorganic Chemistry in 2013 | CAS: 313648-56-5

Dimethyl 5-ethynylisophthalate (cas: 313648-56-5) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Formula: C12H10O4

Homoleptic “Star” Ru(II) Polypyridyl Complexes: Shielded Chromophores to Study Charge-Transfer at the Sensitizer-TiO2 Interface was written by Johansson, Patrik G.;Zhang, Yongyi;Meyer, Gerald J.;Galoppini, Elena. And the article was included in Inorganic Chemistry in 2013.Formula: C12H10O4 This article mentions the following:

Three homoleptic star-shaped Ru polypyridyl complexes, termed Star YZ1, Star YZ2, and Star YZ3, where the Ru(II) center is coordinated to three bipyridine ligands each carrying two oligo(phenylene ethynylene) (OPE) rigid linker units terminating with isophthalic ester (Ipa) groups for binding to metal-oxide surfaces were synthesized. In Star YZ3, each OPE linker was substituted with two n-butoxy (BuO) solubilizing groups. Star complex YZ4, which is homoleptic but lacks the octahedral symmetry, was synthesized as a reference compound The Star complexes were synthesized using two approaches: in the first, Ru(4,4′-(Br)2-2,2′-bpy)3 was reacted in a Sonogashira cross coupling reaction with the ethynyl-OPE-Ipa linkers; in the second, the 2,2′-bpy-OPE-Ipa ligands were reacted with Ru(DMSO)4(PF6)2. The photophys. behavior of the Star complexes were studied in fluid solution and anchored to the surface of mesoporous nanocrystalline TiO2 thin films (Star/TiO2). To a first approximation the excited state behavior in MeCN was unchanged when the compounds were anchored to a TiO2 thin film, indicating that the highly sym. (octahedral) and rigid mol. structure of the ligands shielded the chromophoric core from the TiO2 semiconductor. Inefficient excited state injection, φinj < 0.05, occurs on a nanosecond time scale with slow recombination. The presence of BuO groups on the linker unit gave a large increase in the extinction coefficient of YZ3, which allows for enhanced harvesting of sunlight. Mol. design on the nanometer length scale can be used to control excited state relaxation pathways at semiconductor surfaces. In the experiment, the researchers used many compounds, for example, Dimethyl 5-ethynylisophthalate (cas: 313648-56-5Formula: C12H10O4).

Dimethyl 5-ethynylisophthalate (cas: 313648-56-5) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Formula: C12H10O4

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics