Tag: M.W=700-800

Chen, Zhongxin published the artcileEvolution of the electronic structure in open-shell donor-acceptor organic semiconductors, Recommanded Product: 4,8-Bis(5-bromo-4-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-c:4,5-c’]bis[1,2,5]thiadiazole, the publication is Nature Communications (2021), 12(1), 5889, database is CAplus and MEDLINE.

The donor-acceptor organic semiconductors comprised of diketopyrrolopyrrole and naphthobisthiadiazole acceptors and various electron-rich donors commonly utilized in constructing high-performance organic semiconductors were reported. NMR, ESR, magnetic susceptibility measurements, single-crystal X-ray studies and computational investigations connect the bandgap, π-extension, structural and electronic features with the emergence of various degrees of diradical character. This work systematically demonstrates the widespread diradical character in the classical donor-acceptor organic semiconductors and provides distinctive insights into their ground state structure-property relationship.

Nature Communications published new progress about 1401018-41-4. 1401018-41-4 belongs to benzothiophene, auxiliary class Organic Photo-Voltaic Materials, OPV,BT Acceptors, name is 4,8-Bis(5-bromo-4-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-c:4,5-c’]bis[1,2,5]thiadiazole, and the molecular formula is C30H36Br2N4S4, Recommanded Product: 4,8-Bis(5-bromo-4-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-c:4,5-c’]bis[1,2,5]thiadiazole.

Referemce:
https://en.wikipedia.org/wiki/Benzothiophene,
Benzothiophene | C8H6S – PubChem

Huber, Johannes published the artcileNanoparticles of Low Optical Band Gap Conjugated Polymers, Computed Properties of 1401018-41-4, the publication is Macromolecules (Washington, DC, United States) (2012), 45(19), 7799-7805, database is CAplus.

Sonogashira coupling of 9,9-bis(2-ethylhexyl)-2,7-diethynyl-9H-fluorene (1) with 2,7-dibromo-9,9-bis(2-ethylhexyl)-9H-fluorene (2) and dibromo-substituted electron accepting arylenes 5,7-bis(5-bromothiophen-2-yl)-2,3-dihexylthieno[3,4-b]pyrazine (3), 4,7-bis(5-bromo-4-(2-ethylhexyl)thiophene-2-yl)bis(benzothiadiazole) (4) or 4,9-bis(5-bromo-4-(2-ethylhexyl)thiophen-2-yl)-6,7-dihexylthiadiazolo[3,4-g]quinoxaline (5), resp., in a miniemulsion polymerization process afforded colloidally stable dispersions of poly(arylene ethynylene) nanoparticles with an average size in the range of 50 to 120 nm. For these poly[1-alt-(2-co-X)] (X = 3, 4, or 5), poly(1-alt-3), poly(1-alt-4), and poly(1-alt-5) aqueous nanoparticle dispersions absorption occurs increasingly in the red and NIR regime with increasing incorporation of acceptor monomer, with a strong absorption up to λ_abs = 1 μm for poly(1-alt-4) dispersions. For poly[1-alt-(2-co-3)] nanoparticles fluorescence is also observed at λ_em = ca. 700 nm, which occurs at this long wavelength exclusively even at an incorporation of only 1 mol % of 3 due to energy transfer to the low-energy chromophores. An alternative postpolymn. approach by change of solvent quality yielded dilute aqueous dispersions of self-stabilized nanoparticles from an amphiphilic block copolymer, poly(ethylene glycol)-block-poly(1-alt-6)-block-poly(ethylene glycol) generated from alkyne-terminated poly(1-alt-6) via azide-alkyne coupling (6 = 4,7-bis(5-bromo-4-(2-ethylhexyl)thiophene-2-yl)benzothiadiazole), which fluoresce at λ_em max = 672 nm.

Macromolecules (Washington, DC, United States) published new progress about 1401018-41-4. 1401018-41-4 belongs to benzothiophene, auxiliary class Organic Photo-Voltaic Materials, OPV,BT Acceptors, name is 4,8-Bis(5-bromo-4-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-c:4,5-c’]bis[1,2,5]thiadiazole, and the molecular formula is C30H36Br2N4S4, Computed Properties of 1401018-41-4.

Referemce:
https://en.wikipedia.org/wiki/Benzothiophene,
Benzothiophene | C8H6S – PubChem