Tag: M.W=300-350

Sun, Ming-Li published the artcileDimeric SFX host materials for red, green and blue phosphorescent organic light-emitting devices, Name: Spiro[fluorene-9,9′-xanthene], the publication is Synthetic Metals (2014), 321-327, database is CAplus.

Two novel spiro[fluorene-9,9′-xanthene]-based derivatives 23’ODSFX and 3’3’ODSFX, without possessing conventional hole- or electron-transporting units, have been synthesized by a simple reaction procedure and been demonstrated to be host materials for efficient and low-voltage blue, green and red phosphorescent organic light-emitting devices (PHOLEDs). They showed good thermal stability with high glass transition temperatures (T_g) at 210 °C for 23’ODSFX and 138 °C for 3’3’ODSFX. Compared with SFX-based devices, the performance of 23’ODSFX-based devices increased nearly 20 times, although the difference of HOMO/LUMO levels and triplet levels between dimeric SFX and SFX was very small. The blue PHOLEDs based on 23’ODSFX and 3’3’ODSFX exhibited the same low turn-on voltage of ∼2.6 V, and maximum current efficiency (CE) of 21.7/12.9 cd cd A^-1, power efficiency (PE) of 19.5/11.5 lm W^-1, and external quantum efficiency (EQE) of 11.9%/7.2%, resp. It was evident that the different position linkage in host materials was closely relative to the device performance.

Synthetic Metals 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 C19H21N3O3S, Name: Spiro[fluorene-9,9′-xanthene].

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

Wang, Jin published the artcileCharge trapping in the films blended with polystyrene and different cyano-substituted spirofluorenes organic small molecules, HPLC of Formula: 159-62-6, the publication is Applied Physics A: Materials Science & Processing (2020), 126(6), 451, database is CAplus.

We investigated the charges trapping and retention processes of the blend electret films of polystyrene and different cyano-substituted spirofluorenes organic small mol. material (PS/SFXs) by using at. force microscopy and Kelvin probe force microscopy technologies. The series of blend films present a promising charge storage property and a potential application in the charge trapping memory devices. We focused on the influences of the prepared parameters and the storage conditions for the samples on their charge storage properties. We found that water mols. in the films will influence the injection and retention processes of the trapped charges in the blend PS/SFXs films. The enhanced localization ability of the trapped charges is observed in the film prepared with high annealing temperature The thicknesses of the films have an obvious effect on the charge injection process while having no discernible effect on the retention process. These results are very important for the studies of PS/SFXs in memory devices. The results show that the polarization and net charge transfer coexist for charge trapping in PS/SFXs films, while the symmetry of mol. structure of SFXs plays an important role in trapped charges stability.

Applied Physics A: Materials Science & Processing 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 C15H15OP, HPLC of Formula: 159-62-6.

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

Huang, Junmin published the artcilePreparation and evaluation of proline-based chiral columns, Category: naphthyridine, the publication is Analytical Chemistry (2005), 77(10), 3301-3308, database is CAplus and MEDLINE.

Chiral stationary phases made of readily available proline peptides were prepared and evaluated for general chiral separation With the proper structural elements, these columns demonstrated broad chiral selectivity. Among the 53 analytes tested, a tetraproline column resolved 31. The separations achieved for these analytes are comparable to those achieved on Whelk O2 column, while still inferior to those achieved on Daicel AD-H and OD-H columns. Number of proline units proves important for chiral recognition, because a control column made with a single proline unit is largely ineffective.

Analytical Chemistry published new progress about 2960-93-2. 2960-93-2 belongs to naphthyridine, auxiliary class Naphthalene,Ether,Other MOF ligands,Organic ligands for MOF materials, name is 2,2′-Dimethoxy-1,1′-binaphthalene, and the molecular formula is C22H18O2, Category: naphthyridine.

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

Ou-Yang, Jiang-Kun published the artcileUnexpected Self-Assembly of Chiral Triangles from 90° Chiral Di-Pt(II) Acceptors, Formula: C22H18O2, the publication is Organic Letters (2014), 16(3), 664-667, database is CAplus and MEDLINE.

Two unexpected chiral organometallic triangles rather than squares from newly designed 90° chiral di-Pt-(II) acceptors were obtained through coordination-driven self-assembly. Their structures were well characterized by multinuclear NMR (¹H and ³¹P) and variable-temperature NMR experiments, ESI-TOF-MS, and elemental anal. The PM6 semiempirical mol. simulation was employed for the interpretation of the formation and stability of such chiral triangles.

Organic Letters published new progress about 2960-93-2. 2960-93-2 belongs to naphthyridine, auxiliary class Naphthalene,Ether,Other MOF ligands,Organic ligands for MOF materials, name is 2,2′-Dimethoxy-1,1′-binaphthalene, and the molecular formula is C22H18O2, Formula: C22H18O2.

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

Wu, Ting-Feng published the artcileZirconium-redox-shuttled cross-electrophile coupling of aromatic and heteroaromatic halides, Computed Properties of 2960-93-2, the publication is Chem (2021), 7(7), 1963-1974, database is CAplus and MEDLINE.

Herein, a homogeneous XEC method, which relied on a zirconaaziridine complex as a shuttle for dual palladium-catalyzed processes was reported. The zirconaaziridine-mediated palladium (ZAPd)-catalyzed reaction showed excellent compatibility with various functional groups and diverse heteroaromatic scaffolds. In accord with d. functional theory (DFT) calculations, a redox transmetallation between the oxidative addition product and the zirconaaziridine was proposed as the crucial elementary step. Thus, cross-coupling selectivity using a single transition metal catalyst was controlled by the relative rate of oxidative addition of Pd(0) into the aromatic halide. Overall, the concept of a combined reducing and transmetallating agent offered opportunities for the development of transition metal reductive coupling catalysis.

Chem published new progress about 2960-93-2. 2960-93-2 belongs to naphthyridine, auxiliary class Naphthalene,Ether,Other MOF ligands,Organic ligands for MOF materials, name is 2,2′-Dimethoxy-1,1′-binaphthalene, and the molecular formula is C24H29N5O3, Computed Properties of 2960-93-2.

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

Bi, Dongqin published the artcileFacile synthesized organic hole transporting material for perovskite solar cell with efficiency of 19.8%, COA of Formula: C25H16O, the publication is Nano Energy (2016), 138-144, database is CAplus.

The exploration of alternative mol. hole-transporting materials (HTMs) specifically for high performance perovskite solar cells (PSCs) is a relatively recent research area. Aiming for further increasing the ‘efficiency-cost ratio’ of PSCs, we developed a spiro[fluorene-9,9′-xanthene] based HTM (X59) via two-step synthesis from com. precursors for perovskite solar cells (PSCs) that works as effectively as the well-known HTM-Spiro-OMeTAD-based device under the same conditions. The mol. structure was analyzed by X-ray crystallog. indicating a similar packing regime as for Spiro-OMeTAD. An impressive PCE of 19.8% was achieved by using X59 as HTM in PSC, which can compete with the record PCE of 20.8% by using the state-of-the-art-HTM Spiro-OMeTAD (Tress et al., 2016) [1]. The optimized devices employing X59 as HTM exhibited minimized hysteresis, excellent reproducibility and reasonable stability under dark and dry conditions. The present finding highlights the potential of spiro-type HTM for high performance PSCs and paves the way to a much deceased fabrication cost for potential commercialization of perovskite solar panels.

Nano Energy 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, COA of Formula: C25H16O.

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

Zhang, Jinbao published the artcileThe Importance of Pendant Groups on Triphenylamine-Based Hole Transport Materials for Obtaining Perovskite Solar Cells with over 20% Efficiency, Product Details of C25H16O, the publication is Advanced Energy Materials (2018), 8(2), n/a, database is CAplus.

Tremendous progress has recently been achieved in the field of perovskite solar cells (PSCs) as evidenced by impressive power conversion efficiencies (PCEs); but the high PCEs of >20% in PSCs has so far been mostly achieved by using the hole transport material (HTM) spiro-OMeTAD; however, the relatively low conductivity and high cost of spiro-OMeTAD significantly limit its potential use in large-scale applications. In this work, two new organic mols. with spiro[fluorene-9,9′-xanthene] (SFX)-based pendant groups, X26 and X36, have been developed as HTMs. Both X26 and X36 present facile syntheses with high yields. It is found that the introduced SFX pendant groups in triphenylamine-based mols. show significant influence on the conductivity, energy levels, and thin-film surface morphol. The use of X26 as HTM in PSCs yields a remarkable PCE of 20.2%. In addition, the X26-based devices show impressive stability maintaining a high PCE of 18.8% after 5 mo of aging in controlled (20%) humidity in the dark. We believe that X26 with high device PCEs of >20% and simple synthesis show a great promise for future application in PSCs, and that it represents a useful design platform for designing new charge transport materials for optoelectronic 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 C8H6ClF3, Product Details of C25H16O.

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