Category: 52431-30-8

Kminek, Ivan published the artcileLow-band gap copolymers containing thienothiadiazole units: synthesis, optical, and electrochemical properties, Recommanded Product: 2,5-Dibromo-3,4-dinitrothiophene, the publication is Journal of Polymer Science, Part A: Polymer Chemistry (2010), 48(13), 2743-2756, database is CAplus.

Novel low-band gap alternating copolymers consisting of 9,9-bis(2-ethylhexyl)fluorene and 4,6-di(2-thienyl)thieno[3,4-c][1,2,5]thiadiazole and its 3,3”-dialkyl derivatives were synthesized by Suzuki copolymerization reaction, and their photophys. and electrochem. properties were studied. The copolymers possess small optical band gap 1.3-1.4 eV. The absorption covers the whole visible spectral region. The long-wavelength absorption maxima in thin films located at approx. 750-785 nm are significantly red shifted compared with those in solution, indicating strong intermol. interactions. The introduction of alkyl chains to the thiophene units increases the mol. weights of soluble fractions and solubility of the final copolymers, leading to the improved processability of thin films. Polymer solutions exhibited solvatochromism and thermochromism, which is strongly supported by the involvement of the alkyl chains. The copolymers exhibited ambipolar redox properties and reversible electrochromic behavior. The electronic properties are influenced only slightly by alkyl substituents.

Journal of Polymer Science, Part A: Polymer Chemistry published new progress about 52431-30-8. 52431-30-8 belongs to bromides-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 2,5-Dibromo-3,4-dinitrothiophene, and the molecular formula is C4Br2N2O4S, Recommanded Product: 2,5-Dibromo-3,4-dinitrothiophene.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Cimrova, Vera published the artcileDonor-acceptor copolymers containing bithiophene and dithiophenylthienothiadiazole units with fast electrochromic response, Quality Control of 52431-30-8, the publication is Journal of Materials Chemistry C: Materials for Optical and Electronic Devices (2019), 7(28), 8575-8584, database is CAplus.

New low-bandgap donor-acceptor (D-A) functional copolymers, CDTDBT and CEHTDBT, composed of a 3,3′-didodecyl-2,2′-bithiophene donor and 4,6-bis(3′-dodecylthiophene-2′-yl)thieno[3,4-c][1,2,5]thiadiazole (DT) or 4,6-bis(3′-(2-ethylhexyl)thiophene-2′-yl)thieno[3,4-c][1,2,5]thiadiazole (EHT) acceptor structural units, resp., were synthesized by Stille coupling of the corresponding comonomers. The influence of decyls or branched 2-ethylhexyls chains attached to the thiophenes of the 4,6-bis(3′-alkylthiophene-2′-yl)thieno[3,4-c][1,2,5]thiadiazole on the photophys., thermochromic, electrochem., and spectroelectrochem. properties are reported and discussed in comparison to a series of D-A copolymers with various donor units and the corresponding dithiophenylthienothiadiazole (DT or EHT) acceptor units. The new copolymers, CDTDBT and CEHTDBT, exhibit interesting electrochromic behaviors with fast response times, which reach full optical contrast in 0.3 s. These new copolymers have the potential to be used for optical switching.

Journal of Materials Chemistry C: Materials for Optical and Electronic Devices published new progress about 52431-30-8. 52431-30-8 belongs to bromides-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 2,5-Dibromo-3,4-dinitrothiophene, and the molecular formula is C4Br2N2O4S, Quality Control of 52431-30-8.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Tarkuc, Simge published the artcileThe effect of changes in π-conjugated terthienyl systems using thienyl and ethylenedioxybenzene functionalized thieno[3,4-b]pyrazine precursors: Multicolored low band gap polymers, HPLC of Formula: 52431-30-8, the publication is Electrochimica Acta (2010), 55(24), 7254-7258, database is CAplus.

New classes of thieno[3,4-b]pyrazines containing thienyl and ethylenedioxy Ph units on electron-withdrawing moieties of π-conjugated terthienyl were synthesized. The effect of structural differences on electrochem. and optoelectronic properties of the resulting polymers was studied. Changes in the electronic nature of the functional groups enable to tune the electrochem. properties of the π-conjugated terthienyl monomers by lowering oxidation potential from 0.62 V (DTTP) to 0.56 V (DBTP). Spectroelectrochem. analyses revealed that the neutral polymer (PDBTP) is dark green in its neutral state revealing π-π^* transitions in two well-separated bands at 410 and 751 nm. The electronic band gap of polymer, defined as the onset of the π-π^* transition, is 1.0 eV. Using the thienyl unit instead of ethylenedioxy Ph, a red shift in the band gap (0.95 eV) is observed The polymer, PDTTP, exhibits multicolor electrochromism and can be switched between a dark yellow neutral state, a green intermediate state, and a brown oxidized state. PDBTP also shows a multicolored electrochromic behavior with three distinct states: dark green at the neutral state, a brown intermediate state, and a brown-violet oxidized state.

Electrochimica Acta published new progress about 52431-30-8. 52431-30-8 belongs to bromides-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 2,5-Dibromo-3,4-dinitrothiophene, and the molecular formula is C17H14N2O2, HPLC of Formula: 52431-30-8.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Mikroyannidis, J. A. published the artcileSynthesis and application of low band gap conjugated small molecules containing benzobisthiadiazole and thienothiadiazole central units for bulk heterojunction solar cells, Category: bromides-buliding-blocks, the publication is Journal of Materials Chemistry (2011), 21(12), 4679-4688, database is CAplus.

Two conjugated low band gap small mols. (SMs), M1 and M2, containing benzobisthiadiazole and thienothiadiazole central units, resp., were synthesized. Both SMs carried terminal cyanovinylene 4-nitrophenyl at both sides which were connected to the central unit with a thiophene ring. The long-wavelength absorption band was located at 591-643 nm and the optical band gap was 1.62-1.63 eV, which is lower than that of P3HT. These two SMs were studied as electron donor materials along with PCBM or F as electron acceptors for fabrication of bulk heterojunction (BHJ) organic photovoltaic devices. F is a modified PCBM which was previously synthesized and used as an electron acceptor for poly(3-hexylthiophene) (P3HT). The power conversion efficiency (PCE) for M1:PCBM, M1:F, M2:PCBM and M2:F was 1.05%, 2.02%, 1.23% and 2.72%, resp. The higher PCE for the devices with M2 as the electron donor was related to the improved hole mobility for M2. The improved PCE for the devices with F as the electron acceptor was attributed to the more intense absorption of F in the visible region than that of PCBM and also to the higher open circuit voltage resulting from the higher LUMO level of F. the authors have also fabricated devices with M2:F cast film from mixed solvents. The PCE for the BHJ devices with the as cast and thermally annealed M2:F (mixed solvents) is 3.34% and 3.65%, resp.

Journal of Materials Chemistry published new progress about 52431-30-8. 52431-30-8 belongs to bromides-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 2,5-Dibromo-3,4-dinitrothiophene, and the molecular formula is C4Br2N2O4S, Category: bromides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Mikroyannidis, J. A. published the artcileEfficient bulk heterojunction solar cells using an alternating phenylenevinylene copolymer with dithenyl(thienothiadiazole) segments as donor and PCBM or modified PCBM as acceptor, Formula: C4Br2N2O4S, the publication is Solar Energy Materials & Solar Cells (2011), 95(11), 3025-3035, database is CAplus.

A novel low band gap alternating phenylenevinylene copolymer, P, with dithenyl (thienothiadiazole) segments was synthesized by Heck coupling. It was soluble in common organic solvents, showed broad absorption curve with long-wavelength absorption maximum at 580-598 nm and optical band gap of 1.74 eV, which is comparable with the electrochem. band gap of about 1.80 eV. P (electron donor) was blended with PCBM or modified PCBM i.e. F (electron acceptor) to fabricate bulk heterojunction (BHJ) solar cells. The power conversion efficiency (PCE) of the devices based on P:PCBM and P:F cast from 1.2-dichlorobenzene (DCB) was found to be 1.40% and 2.32%, resp. The higher value of PCE for the device with P:F as compared to P:PCBM is attributed to the increase in both short circuit current (J _sc) and open circuit voltage (V_oc). The increase in the J _sc is due to the stronger light absorption of F in visible region as compared to PCBM, i.e. more exciton generation in the blend. On the other hand, the higher difference between the LUMO levels of P and F, as compared to P and PCBM is responsible for the enhancement in the V_oc. A maximum overall PCE of 4.20% was obtained for the BHJ polymer cell based on the active layer (P:F) deposited from mixed solvents 1-chloronaphthalene/1,2-dichlorobenzene (CN/DCB) and subsequent thermal annealing at 120 °C. This improvement in the PCE has been attributed to the enhanced crystallinity of the blend and more balanced charge transport in the device due to the thermal treatment.

Solar Energy Materials & Solar Cells published new progress about 52431-30-8. 52431-30-8 belongs to bromides-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 2,5-Dibromo-3,4-dinitrothiophene, and the molecular formula is C4Br2N2O4S, Formula: C4Br2N2O4S.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Kolay, Merve published the artcileSynthesis and optical properties of fused aromatic thienopyrazine based π-conjugated polymers, Application In Synthesis of 52431-30-8, the publication is Smart Materials and Structures (2011), 20(7), 075013/1-075013/6, database is CAplus.

Two new polythieno[3,4-b]pyrazine derivatives, poly-10,12-bis(4-hexylthiophen-2-yl)dibenzo[f,h] thieno[3,4-b]quinoxaline (PDBTQ) and poly-8,10-bis(4-hexylthiophen-2-yl)acenaphtho[1,2-b]thieno[3,4-e]pyrazine (PATP) were synthesized by electrochem. polymerization and their electrochem. properties reported. Electroactivity of the monomer and electrochem. redox behavior of its polymers were investigated by cyclic voltammetry. Spectroelectrochem. anal. was performed and the band gaps of the polymers were determined as 2.0 eV and 1.2 eV from the onset of the π-π* transitions of PDBTQ and PATP, resp. The polymer PDBTQ shows multicolored electrochromic behavior with five distinct states-orange (0.0 V), yellow (+0.30 V), brown (+0.50 V), green (+0.65 V), blue-gray (0.80 V); PATP has two distinct colors-transmissive gray (0.0 V) and green (+0.80 V). The polymers revealed superior optical contrast in the near-IR (NIR) region with fast switching times of less than 1 s.

Smart Materials and Structures published new progress about 52431-30-8. 52431-30-8 belongs to bromides-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 2,5-Dibromo-3,4-dinitrothiophene, and the molecular formula is C4Br2N2O4S, Application In Synthesis of 52431-30-8.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Esmer, Elif Nazli published the artcileNear infrared electrochromic polymers based on phenazine moieties, Related Products of bromides-buliding-blocks, the publication is Materials Chemistry and Physics (2011), 131(1-2), 519-524, database is CAplus.

New fused-aromatic quinoxaline and thieno[3,4-b]pyrazine based monomers; 10,12-bis(4-hexylthiophen-2-yl)dibenzo[f,h]thieno[3,4-b]quinoxaline (HTBQ) and 10,13-bis(4-hexylthiophen-2-yl)dipyrido[3,2-a:2′,3′-c]phenazine (HTPP) were synthesized. Electrochem. polymerization of HTBQ and HTPP were performed in acetonitrile/dichloromethane (ACN/DCM) solution containing LiClO₄/NaClO₄. Spectroelectrochem. behavior and switching ability of PHTBQ and PHTPP films were investigated by UV-vis spectroscopy. The polymer films showed reversible electrochem. oxidation with high contrast ratios in the NIR region with low switching times. PHTBQ revealed color changes between brick color and green in the reduced and oxidized states. PHTPP changed color from green to gray when the polymer film was switched between its redox states.

Materials Chemistry and Physics published new progress about 52431-30-8. 52431-30-8 belongs to bromides-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 2,5-Dibromo-3,4-dinitrothiophene, and the molecular formula is C4Br2N2O4S, Related Products of bromides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Zhang, Qian published the artcileSynthesis, Structures, and Properties of BN-Dinaphthothiophenes: Influence of B and N Placement on Photophysical Properties and Aromaticity, Category: bromides-buliding-blocks, the publication is Journal of Organic Chemistry (2020), 85(12), 7877-7883, database is CAplus and MEDLINE.

Substitution of the C=C functionality with the isosteric and isoelectronic B-N moiety has emerged as a powerful way to expand the family of polycyclic aromatic hydrocarbons. In this paper, two types of BN-dinaphthothiophene (BN-DNT) derivatives with different B and N substitution patterns were synthesized in short steps from com. available materials. X-ray crystallog. anal. revealed that BN-DNT had rigid and planar frameworks. Their photophys. properties and the aromaticity of the BN rings of the BN-DNTs were slightly dependent on the B and N substitution patterns. However, their response toward fluoride anions was greatly dependent on the B and N substitution patterns.

Journal of Organic Chemistry published new progress about 52431-30-8. 52431-30-8 belongs to bromides-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 2,5-Dibromo-3,4-dinitrothiophene, and the molecular formula is C15H15OP, Category: bromides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Akula, Suri Babu published the artcileThieno-imidazole based small molecule hole transport materials for dopant-free, efficient inverted (p-i-n) perovskite solar cells, Related Products of bromides-buliding-blocks, the publication is Journal of Materials Chemistry C: Materials for Optical and Electronic Devices (2020), 8(46), 16577-16583, database is CAplus.

Two dipolar mols. based on a thieno-imidazole core, AI109 and AI112, were developed to study the effect of imparting polarity on the hole transport properties in inverted perovskite solar cells (PSCs). These hole transport materials (HTMs) exhibit comparable optoelectronic properties but distinct film morphol. and charge transport characteristics. Besides, the new materials with very low concentrations (1 mg mL-1) are able to form smooth and continuous films. The PSCs based on AI109 and AI112 without any dopants and addnl. interlayers have achieved increased power conversion efficiencies of 13.32% and 13.42%, resp., compared to those of the standard HTMs, 2,2′,7,7′-tetrakis(N,N′-di-p-methoxyphenylamino)-9,9′-spirobifluorene [Spiro-OMeTAD, (11.62%)] and poly(3,4-ethylenedioxythiophene) polystyrene sulfonate [PEDOT:PSS, (12.01%)]. The excellent hole mobility and the superior film morphol. of the AI-HTMs account for their higher efficiencies.

Journal of Materials Chemistry C: Materials for Optical and Electronic Devices published new progress about 52431-30-8. 52431-30-8 belongs to bromides-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 2,5-Dibromo-3,4-dinitrothiophene, and the molecular formula is C4Br2N2O4S, Related Products of bromides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Verolet, Quentin published the artcileDesign and Synthesis of Mixed Oligomers with Thiophenes, Dithienothiophene S,S-Dioxides, Thieno[3,4]pyrazines and 2,1,3-Benzothiadiazoles: Flipper Screening for Mechanosensitive Systems, Recommanded Product: 2,5-Dibromo-3,4-dinitrothiophene, the publication is ChemistryOpen (2015), 4(3), 264-267, database is CAplus and MEDLINE.

Monomers with large surface area and high quantum yield, that was fluorescent flippers, were engineered into twisted push-pull oligomers to create membrane probes with high mechanosensitivity and long fluorescence lifetime. The synthesis and characterization of thieno[3,4]pyrazines and 2,1,3-benzothiadiazoles were described in comparison with the original dithienothiophene S,S-dioxides. Dithienothiophene S,S-dioxide flippers were confirmed as the best reported so far, and poor results with single flipper probes support that two flippers were needed for the probe to really ‘swim’ i.e., for high mechanosensitivity.

ChemistryOpen published new progress about 52431-30-8. 52431-30-8 belongs to bromides-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 2,5-Dibromo-3,4-dinitrothiophene, and the molecular formula is C13H10F2, Recommanded Product: 2,5-Dibromo-3,4-dinitrothiophene.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary