Category: 159-62-6

Guo, Sheng published the artcileVersatile Porous Poly(arylene ether)s via Pd-Catalyzed C-O Polycondensation, Quality Control of 159-62-6, the publication is Journal of the American Chemical Society (2021), 143(30), 11828-11835, database is CAplus and MEDLINE.

Porous organic polymers (POPs) with strong covalent linkages between various rigid aromatic structural units having different geometries and topologies are reported. With inherent porosity, predictable structure, and tunable functionality, POPs have found utility in gas separation, heterogeneous catalysis, sensing, and water treatment. Poly(arylene ether)s (PAEs) are a family of high-performance thermoplastic materials with high glass-transition temperatures, exceptional thermal stability, robust mech. properties, and excellent chem. resistance. These properties are desirable for development of durable POPs. However, the synthetic methodol. for the preparation of these polymers has been mainly limited in scope to monomers capable of undergoing nucleophilic aromatic substitution (S_NAr) reactions. Herein, we describe a new general method using Pd-catalyzed C-O polycondensation reactions for the synthesis of PAEs. A wide range of new compositions and PAE architectures are now readily available using monomers with unactivated aryl chlorides and bromides. Specifically, monomers with conformational rigidity and intrinsic internal free volume are now used to create porous organic polymers with high mol. weight, good thermal stability, and porosity. The reported porous PAEs are solution processable and can be used in environmentally relevant applications including heavy-metal-ion sensing and capture.

Journal of the American Chemical Society published new progress about 159-62-6. 159-62-6 belongs to naphthyridine, auxiliary class Other Aromatic Heterocyclic,Spiro, name is Spiro[fluorene-9,9′-xanthene], and the molecular formula is C25H16O, Quality Control of 159-62-6.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Vesce, Luigi published the artcileEfficient and stable perovskite large area cells by low-cost fluorene-xantene-based hole transporting layer, Name: Spiro[fluorene-9,9′-xanthene], the publication is Energies (Basel, Switzerland) (2021), 14(19), 6081, database is CAplus.

Among the new generation photovoltaics, perovskite solar cell (PSC) technol. reached top efficiencies in a few years. Currently, the main objective to further develop PSCs is related to the fabrication of stable devices with cost-effective materials and reliable fabrication processes to achieve a possible industrialization pathway. In the n-i-p device configuration, the hole transporting material (HTM) used most is the highly doped organic spiro-fluorene-based material (Spiro-OMeTAD). In addition to the high cost related to its complex synthesis, this material has different issues such as poor photo, thermal and moisture stability. Here, we test on small and large area PSCs a com. available HTM (X55, Dyenamo) with a new core made by low-cost fluorene-xantene units. The one-pot synthesis of this compound reduces 30 times its cost with respect to Spiro-OMeTAD. The optoelectronic performances and properties are characterized through JV measurement, IPCE (incident photon to current efficiency), steady-state photoluminescence and ISOS stability test. SEM (scanning electron microscope) images reveal a uniform and pinhole free coverage of the X55 HTM surface, which reduces the charge recombination losses and improves the device performance relative to Spiro-OMeTAD from 16% to 17%. The ISOS-D-1 stability test on large area cells without any encapsulation reports an efficiency drop of about 15% after 1000 h compared to 30% for the reference case.

Energies (Basel, Switzerland) published new progress about 159-62-6. 159-62-6 belongs to naphthyridine, auxiliary class Other Aromatic Heterocyclic,Spiro, name is Spiro[fluorene-9,9′-xanthene], and the molecular formula is C13H10O2, Name: Spiro[fluorene-9,9′-xanthene].

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Kotha, Sambasivarao published the artcileModular Approach to Benzofurans, 2H-Chromenes and Benzoxepines via Claisen Rearrangement and Ring-Closing Metathesis: Access to Phenylpropanoids, Computed Properties of 159-62-6, the publication is Chemistry – An Asian Journal (2022), 17(8), e202200084, database is CAplus and MEDLINE.

Benzofurans, 2H-chromenes and benzoxepines are key structural elements present in several natural products and pharmaceuticals. Here, an easy-to-execute strategy for the synthesis of benzofurans, 2H-chromenes and benzoxepines, by employing Claisen rearrangement and ring-closing metathesis as key steps is reported. A variety of phenols were converted into useful oxacycles in good to excellent yields. The ring-closing metathesis approach has been used to produce phenylpropanoid natural products. Examples described here include, the naturally occurring benzofurans such as 7-methoxywutaifuranal, 7-methoxywutaifuranol, 7-methoxywutaifuranate and the O-prenylated natural products like boropinic acid, boropinols A and C.

Chemistry – An Asian Journal published new progress about 159-62-6. 159-62-6 belongs to naphthyridine, auxiliary class Other Aromatic Heterocyclic,Spiro, name is Spiro[fluorene-9,9′-xanthene], and the molecular formula is C25H16O, Computed Properties of 159-62-6.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Xu, Bo published the artcile4-Tert-butylpyridine Free Organic Hole Transporting Materials for Stable and Efficient Planar Perovskite Solar Cells, Application of Spiro[fluorene-9,9′-xanthene], the publication is Advanced Energy Materials (2017), 7(19), n/a, database is CAplus.

4-Tert-butylpyridine (tBP) is an important additive in triarylamine-based organic hole-transporting materials (HTMs) for improving the efficiency and steady-state performance of perovskite solar cells (PVSCs). However, the low b.p. of tBP (196°C) significantly affects the long-term stability and device performance of PVSCs. Herein, the design and synthesis of a series of covalently linked Spiro[fluorene-9,9′-xanthene] (SFX)-based organic HTMs and pyridine derivatives to realize efficient and stable planar PVSCs are reported. One of the tailored HTMs, N2,N2,N7,N7-tetrakis(4-methoxyphenyl)-3′,6′-bis(pyridin-4-ylmethoxy) spiro[fluorene-9,9′-xanthene]-2,7-diamine (XPP) with two para-position substituted pyridines that immobilized on the SFX core unit shows a high power conversion efficiency (PCE) of 17.2% in planar CH₃NH₃PbI₃-based PVSCs under 100 mW cm^-2 AM 1.5G solar illumination, which is much higher than the efficiency of 5.5% that using the well-known 2,2′,7,7′-tetrakis-(N,N-di-p-methoxy-phenyl-amine)9,9′-spirobifluorene (Spiro-OMeTAD) as HTM (without tBP) under the same condition. Most importantly, the pyridine-functionalized HTM-based PVSCs without tBP as additive show much better long-term stability than that of the state-of-the-art HTM Spiro-OMeTAD-based solar cells that containing tBP as additive. This is the first case that the tBP-free HTMs are demonstrated in PVSCs with high PCEs and good stability. It paves the way to develop highly efficient and stable tBP-free HTMs for PVSCs toward com. applications.

Advanced Energy Materials published new progress about 159-62-6. 159-62-6 belongs to naphthyridine, auxiliary class Other Aromatic Heterocyclic,Spiro, name is Spiro[fluorene-9,9′-xanthene], and the molecular formula is C5H5F3O2, Application of Spiro[fluorene-9,9′-xanthene].

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Ren, Bao-Yi published the artcileQuinolyl functionalized spiro[fluorene-9,9′-xanthene] host materials with bipolar characteristics for green and red phosphorescent organic light-emitting diodes, Computed Properties of 159-62-6, the publication is Organic Electronics (2016), 140-147, database is CAplus.

Spiro[fluorene-9,9′-xanthene] (SFX) bipolar hosts bearing one, two and three quinolyl substituents, namely SFX-bPy, SFX-DbPy and SFX-TbPy, were designed and synthesized for phosphorescent organic light emitting diodes (PhOLEDs). The successive substitution of quinoline at 2′, 2 and 7′ positions of SFX results in reduced LUMO energy levels while leaving the HOMO energy levels nearly intact. The impact of quinoline substitution in these SFX-based hosts on PhOLED performance was investigated in detail through green and red model devices. For the green emitting devices, the device based on SFX-bPy host showed better performance (23.6 cd A^-1, 23.4 lm W^-1, 6.3%) due to high triplet energy level (T₁) and balanced carriers-transporting ability. In contrast, for the red PhOLED devices, the device hosted by SFX-DbPy displayed higher performance (15.8 cd A^-1, 16.0 lm W^-1, 9.1%), attributable to the well matched T₁ and separated frontier MOs. This work thus sheds light on the rational design of SFX-based bipolar hosts for more efficient PhOLEDs.

Organic Electronics published new progress about 159-62-6. 159-62-6 belongs to naphthyridine, auxiliary class Other Aromatic Heterocyclic,Spiro, name is Spiro[fluorene-9,9′-xanthene], and the molecular formula is C25H16O, Computed Properties of 159-62-6.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Cao, Hong-Tao published the artcileNovel electron acceptor based on spiro[fluorine-9,9′-xanthene] for exciplex thermally activated delayed fluorescence, SDS of cas: 159-62-6, the publication is Dyes and Pigments (2018), 422-429, database is CAplus.

Two cyano-substituted spiro[fluorine-9,9′-xanthene] (SFX) derivatives, 2-carbonitrile-spiro[fluorene-9,9′-xanthene] (CNSFX) and 2,7-dicarbonitrile-spiro[fluorene-9,9′-xanthene] (DCNSFX) were conveniently prepared as electron acceptors to combine with tris(4-carbazoyl-9-ylphenyl)amine (TCTA) as electron donor to form exciplex emitters, resp. Favorable exciplex-TADF was successfully achieved with photoluminescence quantum yield of 31% and electroluminescence efficiency of 8.2 cd A^-1 in TCTA:DCNSFX, which possesses increases of 1.1 and 3.3 times than those (15% and 1.9 cd A^-1) of TCTA:CNSFX, resp. The relatively favorable performance of TCTA:DCNSFX is related to the stronger electron-accepting ability through dicyano-substitution and larger driving force in the exciplex emission. These appealing results reveal that the dicyano-substituted SFX derivative opens interesting perspectives for developing favorable exciplex-TADF organic light-emitting diodes in the future.

Dyes and Pigments published new progress about 159-62-6. 159-62-6 belongs to naphthyridine, auxiliary class Other Aromatic Heterocyclic,Spiro, name is Spiro[fluorene-9,9′-xanthene], and the molecular formula is C25H16O, SDS of cas: 159-62-6.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Ren, Baoyi published the artcileOxybromination of spiro [fluorene-9,9′-xanthene] over 12-tungstophosphoric acid supported on zirconia, HPLC of Formula: 159-62-6, the publication is Yingyong Huaxue (2013), 30(11), 1299-1303, database is CAplus.

A catalyst for the oxybromination of spiro [fluorene-9,9′-xanthene], 12-tungstophosphoric acid (TPA) supported on zirconia, was prepared Effects of TPA loading and activation temperature on the structure of the catalyst and the catalytic performance for oxybromination of spiro [fluorine-9,9′-xanthene] (SFX) have been investigated. The results of XRD and FTIR anal. show that the monoclinic zirconia transformed to tetragonal phase with the increase of TPA loading and calcinations temperature A preliminary study on catalysts with 15% ( mass fraction) TPA indicated that calcination at 300°C could greatly enhance the stability of catalyst. The bromination position of the products was confirmed in the position of 2 of SFX from NMR.

Yingyong Huaxue published new progress about 159-62-6. 159-62-6 belongs to naphthyridine, auxiliary class Other Aromatic Heterocyclic,Spiro, name is Spiro[fluorene-9,9′-xanthene], and the molecular formula is C25H16O, HPLC of Formula: 159-62-6.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Wu, Guohua published the artcileHole-Transport Materials Containing Triphenylamine Donors with a Spiro[fluorene-9,9′-xanthene] Core for Efficient and Stable Large Area Perovskite Solar Cells, SDS of cas: 159-62-6, the publication is Solar RRL (2017), 1(9), 1-9, database is CAplus.

Three low-cost triphenylamine-based hole-transport materials (HTMs) with spiro[fluorene-9,9-xanthene] (SFX) skeleton are synthesized through a facile three-step procedure. The effect of the chem. structure of the HTMs on the optical property, energy levels, H₂O/HTM interface, as well as the perovskite solar cell performance are studied. With the increasing bulkiness of attached groups on the SFX skeleton, the charge recombination resistance at the TiO₂/perovskite/HTMs interfaces is gradually increased, leading to increased open-circuit voltages. The device based on the bulkiest HTM (named BTPA-6) exhibits a better solar cell performance (11.57%, area: 1.02 cm²) than those with BTPA-4 and BTPA-5 in the forward scan. BTPA-6 also exhibits a power conversion efficiency of 14.4% (area: 0.375 cm²) which nearly matches spiro-OMeTAD (15.0%) in the reverse scan. Furthermore, all the three cost-effective (∼1/3 of that of spiro-OMeTAD) HTMs exhibit better long-term stabilities than spiro-OMeTAD.

Solar RRL published new progress about 159-62-6. 159-62-6 belongs to naphthyridine, auxiliary class Other Aromatic Heterocyclic,Spiro, name is Spiro[fluorene-9,9′-xanthene], and the molecular formula is C6H16OSi, SDS of cas: 159-62-6.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Ren, Baoyi published the artcileSynthesis and characterization of bromo and acetyl derivatives of spiro [fluorene-9, 9′-xanthene], Related Products of naphthyridine, the publication is Huaxue Tongbao (2013), 76(6), 512-516, database is CAplus.

Bromination and acetylation of spiro [fluorene-9, 9′-xanthene] (SFX) as substrate have been described. As a result, six SFX-based derivatives I(R¹ = Br, CH₃CO, R² = R³ = H; R¹ = R² = Br, CH₃CO; R¹ = R² = R³ = Br, CH₃CO) have been obtained under the condition of either bromo source from potassium bromate, potassium bromide with sulfuric acid at 0°C or acetylchloride as acylation reagent at room temperature The attacked positions of substituted SFX have been confirmed by the characterization of NMR, in which the bromination reaction in turn occur at the position of 2′, 7′ and 2 while the acetylation reaction in turn at the position of 2′, 2 and 7′. These results offer the basic platform to design the new-concept SFX-based organic semiconductors.

Huaxue Tongbao published new progress about 159-62-6. 159-62-6 belongs to naphthyridine, auxiliary class Other Aromatic Heterocyclic,Spiro, name is Spiro[fluorene-9,9′-xanthene], and the molecular formula is C25H16O, Related Products of naphthyridine.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Xu, Bo published the artcileTailor-Making Low-Cost Spiro[fluorene-9,9′-xanthene]-Based 3D Oligomers for Perovskite Solar Cells, SDS of cas: 159-62-6, the publication is Chem (2017), 2(5), 676-687, database is CAplus.

The power-conversion efficiencies (PCEs) of perovskite solar cells (PSCs) have increased rapidly from about 4% to 22% during the past few years. One of the major challenges for further improvement of the efficiency of PSCs is the lack of sufficiently good hole transport materials (HTMs) to efficiently scavenge the photogenerated holes and aid the transport of the holes to the counter-electrode in the PSCs. In this study, we tailor-made two low-cost spiro[fluorene-9,9′-xanthene] (SFX)-based 3D oligomers, termed X54 and X55, by using a one-pot synthesis approach for PSCs. One of the HTMs, X55, gives a much deeper HOMO level and a higher hole mobility and conductivity than the state-of-the-art HTM, Spiro-OMeTAD. PSC devices based on X55 as the HTM show a very impressive PCE of 20.8% under 100 mW·cm^-2 AM1.5G solar illumination, which is much higher than the PCE of the reference devices based on Spiro-OMeTAD (18.8%) and X54 (13.6%) under the same conditions.

Chem published new progress about 159-62-6. 159-62-6 belongs to naphthyridine, auxiliary class Other Aromatic Heterocyclic,Spiro, name is Spiro[fluorene-9,9′-xanthene], and the molecular formula is C14H12N2S, SDS of cas: 159-62-6.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem