Tag: 384.273

High-performance non-doped near ultraviolet OLEDs with the EQE ∼ 6% and CIEy ∼ 0.03 from high-lying reverse intersystem crossing was written by Peng, Ling;Lv, Jichen;Xiao, Shu;Huo, Yumiao;Liu, Yuchao;Ma, Dongge;Ying, Shian;Yan, Shouke. And the article was included in Chemical Engineering Journal (Amsterdam, Netherlands) in 2022.Synthetic Route of C18N12 This article mentions the following:

Developing high-performance organic fluorophors with short-wavelength emission is both significant and challenging subject in the application of organic light-emitting diodes (OLEDs). A coupling hardness with distortion design concept is proposed to construct an efficient near UV (NUV) fluorophor mP2MPC with 1,4-dimethyl-2,5-diphenylbenzene as a rotatable bridge via the meta-positions linking rigid and bulky phenanthroimidazole and carbazole groups. The nondoped OLED with it as emitter not only exhibits an emission peak at 395 nm with the Commission Internationale de l’ećlairage coordinates of (0.163, 0.028), but also realizes a high forward-viewing external quantum efficiency of 6.09% due to the high-lying reverse intersystem crossing. The value still keeps ≤5.56% at 1000 cd m^-2, showing a small efficiency roll-off. This is 1 of the highest efficiencies among the nondoped devices with the electroluminescence peak <400 nm. The green and red phosphorescent OLEDs with mP2MPC as host can also show excellent electroluminescence performance with the forward-viewing external quantum efficiencies over 21.5%, illustrating that mP2MPC should be a prospective material for OLEDs. In the experiment, the researchers used many compounds, for example, Dipyrazino[2,3-f:2′,3′-h]quinoxaline-2,3,6,7,10,11-hexacarbonitrile (cas: 105598-27-4Synthetic Route of C18N12).

Dipyrazino[2,3-f:2′,3′-h]quinoxaline-2,3,6,7,10,11-hexacarbonitrile (cas: 105598-27-4) belongs to quinoxaline derivatives. Condensed heterocycles of quinoxalines have become attractive targets in synthetic and medicinal chemistry due to their significant biological activities. Modifying quinoxaline structure it is possible to obtain a wide variety of biomedical applications, namely antimicrobial activities and chronic and metabolic diseases treatment.Synthetic Route of C18N12

Referemce:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

2,3-Disubstituted Fluorene Scaffold for Efficient Green Phosphorescent Organic Light-Emitting Diodes was written by Wei, Jia-Jia;Yang, Yong-Jian;Liu, Xiang-Yang;Li, Runlai;Li, Shu-an. And the article was included in Chemistry – A European Journal in 2022.Related Products of 105598-27-4 This article mentions the following:

A simple and efficient strategy for the derivatization at the 2- and 3- positions in fluorene unit was explored. By introducing different types of substituents, 2 pairs of 2,3-disubstituted fluorene isomers were designed and used as host materials for phosphorescent organic light-emitting diodes (PHOLEDs). The green PHOLEDs hosted by these fluorene derivatives realize high external quantum efficiencies (EQE) >20% with low efficiency roll-off. The devices hosted by 2TRz3TPA and 2TPA3TRz achieve nearly 24% EQE and 104 lm W^-1 power efficiency. The 2,3-disubstituted fluorene platforms are potentially useful for constructing host materials. In the experiment, the researchers used many compounds, for example, Dipyrazino[2,3-f:2′,3′-h]quinoxaline-2,3,6,7,10,11-hexacarbonitrile (cas: 105598-27-4Related Products of 105598-27-4).

Dipyrazino[2,3-f:2′,3′-h]quinoxaline-2,3,6,7,10,11-hexacarbonitrile (cas: 105598-27-4) belongs to quinoxaline derivatives. Condensed heterocycles of quinoxalines have become attractive targets in synthetic and medicinal chemistry due to their significant biological activities. Quinoxaline-1,4-di-N-oxide derivatives have shown to improve the biological results and are endowed with anti-viral, anti-cancer, anti-bacterial, and anti-protozoal activities with application in many other therapeutic areas.Related Products of 105598-27-4

Referemce:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

High-Performance Narrowband Pure-Red OLEDs with External Quantum Efficiencies up to 36.1% and Ultralow Efficiency Roll-Off was written by Zou, Yang;Hu, Jiahao;Yu, Mingxin;Miao, Jingsheng;Xie, Ziyang;Qiu, Yuntao;Cao, Xiaosong;Yang, Chuluo. And the article was included in Advanced Materials (Weinheim, Germany) in 2022.Category: quinoxaline This article mentions the following:

High-color-purity blue and green organic light-emitting diodes (OLEDs) have been resolved thanks to the development of B/N-based polycyclic multiple resonance (MR) emitters. However, due to the derivatization limit of B/N polycyclic structures, the design of red MR emitters remains challenging. Herein, a series of novel red MR emitters is reported by para-positioning N-π-N, O-π-O, B-π-B pairs onto a benzene ring to construct an MR central core. These emitters can be facilely and modularly synthesized, allowing for easy fine-tuning of emission spectra by peripheral groups. Moreover, these red MR emitters display excellent photophys. properties such as near-unity photoluminescence quantum yield (PLQY), fast radiative decay rate (kr) up to 7.4 x 107 s-1, and most importantly, narrowband emission with full-width at half-maximum (FWHM) of 32 nm. Incorporating these MR emitters, pure red OLEDs sensitized by phosphor realize state-of-the-art device performances with external quantum efficiency (EQE) exceeding 36%, ultralow efficiency roll-off (EQE remains as high as 25.1% at the brightness of 50 000 cd m^-2), ultrahigh brightness over 130 000 cd m^-2, together with good device lifetime. In the experiment, the researchers used many compounds, for example, Dipyrazino[2,3-f:2′,3′-h]quinoxaline-2,3,6,7,10,11-hexacarbonitrile (cas: 105598-27-4Category: quinoxaline).

Dipyrazino[2,3-f:2′,3′-h]quinoxaline-2,3,6,7,10,11-hexacarbonitrile (cas: 105598-27-4) belongs to quinoxaline derivatives. Quinoxalines have received a significant amount of attention due to their potential use in fighting various pathophysiological conditions like epilepsy, Parkinson’s, and Alzheimer’s diseases. Quinoxalines are used in the treatment of bacterial, cancer, and HIV infections. Moreover, varenicline, a clinical drug is used for treating nicotine addiction, also contains quinoxaline moiety.Category: quinoxaline

Referemce:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

Cobalt(II)-Hexaazatriphenylene Hexacarbonitrile Coordination Compounds Based Cathode Materials with High Capacity and Long Cycle Stability was written by Wang, Yifan;Poldorn, Preeyaporn;Wongnongwa, Yutthana;Jungsuttiwong, Siriporn;Chen, Chong;Yu, Le;Wang, Zhuyi;Shi, Liyi;Zhao, Yin;Yuan, Shuai. And the article was included in Advanced Functional Materials in 2022.Computed Properties of C18N12 This article mentions the following:

Organic cathode materials are plagued by their low cycle stability and poor electronic conductivity, even though they have attracted increasing attention in the context of lithium-ion batteries (LIBs). Herein, a coordination polymer cobalt-hexaazatriphenylene hexacarbonitrile (Co(HAT-CN)) is prepared via a facile solvothermal method, which is composed of the redox-active HAT-CN linker and the Co(II) ion center. The fabricated material shows excellent structural stability and high conductivity Moreover, graphene oxide (GO) is introduced as a substrate, and in-situ loading of Co(HAT-CN) on its surface shows enhanced cycling stability. For Co(HAT-CN)/GO, a high specific capacity of 204 mAh g^-1 can be retained even after 200 cycles at a c.d. of 40 mA g^-1 in a voltage window of 1.2-3.9 V. Ex situ and in situ analyses are applied to probe the reversibility of the pyrazine redox-active center during the cycling process and the lithium storage process. D. functional theory calculations reveal that the high conductivity of Co(HATCN) should be ascribed to the narrow LUMO-HOMO gap (0.61 eV), and strong binding of lithiated mols. In the experiment, the researchers used many compounds, for example, Dipyrazino[2,3-f:2′,3′-h]quinoxaline-2,3,6,7,10,11-hexacarbonitrile (cas: 105598-27-4Computed Properties of C18N12).

Dipyrazino[2,3-f:2′,3′-h]quinoxaline-2,3,6,7,10,11-hexacarbonitrile (cas: 105598-27-4) belongs to quinoxaline derivatives. Compounds possessing quinoxaline derivatives were bestowed with a variety of significant biological properties such as antiviral, antimalarial, anticancer, DNA intercalation, DNA duplex stabilization, and many others. Quinoxaline and its analogues may also be formed by reduction of amino acids substituted 1,5-difluoro-2,4-dinitrobenzene (DFDNB),One study used 2-iodoxybenzoic acid (IBX) as a catalyst in the reaction of benzil with 1,2-diaminobenzene.Computed Properties of C18N12

Referemce:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

Role of Guest Materials in the Lower Stability of Solution-Coated versus Vacuum-Deposited Phosphorescent OLEDs was written by Samaeifar, Fatemeh;Aziz, Hany. And the article was included in ACS Applied Materials & Interfaces in 2022.Reference of 105598-27-4 This article mentions the following:

Utilizing different phosphorescent materials as emitter guests, this work investigates the root causes of the lower electroluminescence (EL) stability of solution-coated (SOL) organic light-emitting devices (OLEDs) relative to their vacuum-deposited (VAC) counterparts. The results show that emitter guest mols. aggregate under elec. stress, leading to the emergence of new longer-wavelength bands in the EL spectra of the devices over time. However, the intensity of these aggregation emission bands is much stronger in the case of SOL host:guest systems than that of their VAC counterparts, indicating that guest aggregation occurs much faster in the former. The results reveal that the phenomenon arises from differences in the initial morphologies and are likely associated with the use of solvents in the solution-coating process. Moreover, although excitons can drive this aggregation in the case of SOL emissive layer (EML) devices, the coexistence of excitons and polarons accelerates this phenomenon significantly. The results uncover one of the main causes of the lower stability of OLEDs made by solution coating and reveal the importance of adopting new mol. designs that make them less susceptible to aggregation for the development of SOL OLEDs with high performance. In the experiment, the researchers used many compounds, for example, Dipyrazino[2,3-f:2′,3′-h]quinoxaline-2,3,6,7,10,11-hexacarbonitrile (cas: 105598-27-4Reference of 105598-27-4).

Dipyrazino[2,3-f:2′,3′-h]quinoxaline-2,3,6,7,10,11-hexacarbonitrile (cas: 105598-27-4) belongs to quinoxaline derivatives. Quinoxalines are important class of heterocyclic compounds, associated with wider pharmacological applications. Modifying quinoxaline structure it is possible to obtain a wide variety of biomedical applications, namely antimicrobial activities and chronic and metabolic diseases treatment.Reference of 105598-27-4

Referemce:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider