14276-80-3

Basic information

• Product Name: 2-ethyloctadecanoic acid
• Synonyms: 2-ethyloctadecanoic acid;Octadecanoic acid, 2-ethyl-;2-Ethylstearic acid;Einecs 238-167-9
• CAS NO: 14276-80-3
• Molecular Formula: C₂₀H₄₀O₂
• Molecular Weight: 312.5304
• EINECS: 238-167-9
• Mol File: 14276-80-3.mol

Chemical Properties

• Boiling Point: 391.36°C (estimate)
• Flash Point: 243°C
• Appearance: /
• Density: 0.8830
• Vapor Pressure: 1.41E-08mmHg at 25°C
• Refractive Index: 1.4489 (estimate)
• CAS DataBase Reference: 2-ethyloctadecanoic acid(CAS DataBase Reference)
• NIST Chemistry Reference: 2-ethyloctadecanoic acid(14276-80-3)
• EPA Substance Registry System: 2-ethyloctadecanoic acid(14276-80-3)

Safety Data

• Hazardous Substances Data: 14276-80-3(Hazardous Substances Data)

Usage

InChI:InChI=1/C20H40O2/c1-3-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19(4-2)20(21)22/h19H,3-18H2,1-2H3,(H,21,22)

Upstream product

• 4473-02-3 ethyl-hexadecyl-malonic acid 
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• 57-11-4 stearic acid 

Relevant articles and documents

New Quinoxaline-Containing Monomers for Narrow-Bandgap Polymers

Two new fused quinoxaline-containing monomers—2,3-bis(9-(2-decyltetradecyl)-9H-carbazol-3-yl)dithieno[3,2-f:2'3'-h]quinoxaline (М1) and 2,5-di(nonadecan-3-yl)bis[1,3]thiazolo[4,5-a:5',4'-c]bisthieno[3,2-h:2',3'-j]phenazine (М2)—have been synthesized in high yields of 88 and 83% as promising building blocks of D-A polymers for photovoltaic applications. The optical bandgaps, found from the absorption edge, are 2.79 and 2.88 eV, respectively. The HOMO/LUMO energies of М1 and М2 are–5.83/–2.96 and–5.83/–2.98 eV, respectively. Both monomers have low-lying HOMO levels, which is favorable for a high open-circuit voltage and a high stability in air in the development of PSCs. The Egec values of monomers М1 and М2 are 2.87 and 2.85 eV and are consistent well with the optical bandgap (2.79 and 2.88 eV, respectively).

Design and synthesis of new ultra-low band gap thiadiazoloquinoxaline-based polymers for near-infrared organic photovoltaic application

Two D-A copolymers, F1 and F2, with fluorene and thiazole units were substituted, respectively, on a thiadiazoloquinoxaline (TDQ) unit to enhance the electron-accepting strength of TDQ. The copolymers were synthesized by a cross-coupling Stille reaction and their optical and electrochemical properties were examined, which revealed that they have ultra-low band gaps and absorption in the near-infrared. These copolymers were employed as donors along with PC71BM as an electron acceptor for the fabrication of solution-processed bulk heterojunction (BHJ) polymer solar cells. After the optimization of the donor-to-acceptor weight ratio and the solvent additive (4 v% DIO as solvent additive), devices with F1:PC71BM and F2:PC71BM displayed power conversion efficiencies (PCEs) of 5.80% and 3.32%, respectively. Although F2 possesses a broader absorption profile compared with F1, the lower value of PCE for the F2-based device was attributed to the low LUMO offset between F2 and PC71BM, which limited the exciton dissociation. The abovementioned results indicate that these copolymers can be utilized for ternary BHJ and tandem solar cells to achieve a high PCE.