Results 81 to 90 of about 3,823 (239)

Investigation and Evaluation of Wax Deposition Treatment Methods in Large Natural Gas Plants

Energy Science &Engineering, EarlyView.
Problem: Wax blockage (Biphenyl, PAHs) in low‐temperature units crippled plant capacity. Solution: A novel Circulating Light Hydrocarbon Injection technology. Mechanism: Light hydrocarbons disrupt wax crystals via “like dissolves like” and are continuously recovered. Outcome: 1. Throughput dropped from 10 MMscmd to 3 MMscmd 2.
Jiahao Wu, Xing Chen, Fanzeng Yang, Kejia Zhang, Zhihan Cao, Xuyang Zhang, Dong Jiang   +6 more
wiley   +1 more source

Hydrogenation of 9-pyridylmethylene- and 9-benzylidene(aza)fluorenes in the presence of rhenium heptasulfide

, 2020
Hydrogenation of 9-pyridylmethylene(aza)fluorenes and 9-benzylidene-4-azafluorene at 250°C and pH2 = 130 atm in the presence of Re2S7 as a catalyst occurs preferably at the exocyclic double bond of the fulvene fragment to yield pyridyl-9-(aza ...
Kolyadina N.M., Ryashentseva M.A., Prostakov N.S., Soldatenkov A.T.   +3 more
core  

Spirobifluorene fusion in multiple resonance frameworks enables efficient pure‐red OLEDs with narrowband emission and suppressed efficiency roll‐off

FlexMat, EarlyView.
An orthogonal spirobifluorene‐fusion strategy is introduced for B/N/O‐alternated MR frameworks, enabling improved kRISC (5.46 × 103 s−1), high ΦPL (97%), and narrow‐band pure‐red emission. Vacuum‐evaporated OLEDs incorporating this emitter achieve an EQEmax >40% (FWHM = 36 nm) and exhibit exceptionally low efficiency roll‐off at high luminance ...
Yan‐Yun Jing, Han Wu, Xiaoling Xu, Sijie Xian, Jingsheng Miao, Xiaojun Yin, Chuluo Yang, Xiaosong Cao   +7 more
wiley   +1 more source

Brönsted Acid-Mediated Intramolecular Cyclization of Biaryl Triazenes for the Synthesis of Fluorenes and 9,10-Dihydro-Phenanthrenes

, 2016
The efficient synthesis of fluorenes from biaryl triazenes is successfully developed. Up to 27 examples of biaryl triazenes are converted into their corresponding fluorene derivatives in the presence of CF3COOH (4.0 equiv).
Xin Xu (11989), Weijun Yang (560411), Lili Zhang (120447), Lijun Xu (195394), Maozhong Miao (560413), Hongjun Ren (560414), Zhigen Yang (560412)   +6 more
core   +1 more source

Copper(I)-Catalyzed Syntheses of Benzo[b]fluorenes by the Cascade Reactions of 2‑Alkynylbenzaldehyde N‑Tosylhydrazones and Aromatic Terminal Alkynes

, 2022
Benzo[b]fluorenes were synthesized via CuI-catalyzed cascade reactions of 2-alkynylbenzaldehyde N-tosylhydrazones and aromatic terminal alkynes in the presence of base including the formation of the benzoenyne–allene intermediate in situ and its ...
Jiaying Lv (14124117), Huixin Liu (569738), Le Lu (5228393), Ruimao Hua (1545895)   +3 more
core   +1 more source

Flexible organic room‐temperature phosphorescent materials

FlexMat, EarlyView.
This review highlights recent advances in flexible organic room‐temperature phosphorescent (RTP) materials, covering both organic crystal and polymer systems. It discusses strategies to overcome the inherent rigidity and enhance the mechanical flexibility of organic RTP materials, aiming to enable their practical applications in anti‐counterfeiting ...
Bolun Zhang, Xiaokang Shao, Wenjie Yin, Jiahui Xu, Beishen Wu, Zhongfu An, Huifang Shi   +6 more
wiley   +1 more source

Cyclo-oligomerization of 6,12-Diethynyl Indeno[1,2‑b]fluorenes via Diradical Intermediates

, 2015
Indeno­[1,2-b]­fluorene derivatives with trimethylsilylethynyl substituents at the 6- and 12-positions were found to undergo cyclo-dimerization, cyclo-trimerization, and higher oligomerizations at room temperature.
Xiangyu Fu (1479364), Dahui Zhao (1342095)   +1 more
core   +2 more sources

Highly fluorescent intramolecular dimmers of two pyrenyl-substituted fluorenes bridged by 1,6-hexanyl : synthesis, spectroscopic, and self-organized properties

, 2010
Highly fluorescent intramolecular dimmers of two pyrenyl-substituted fluorenes bridged by 1,6-hexanyl : synthesis, spectroscopic, and self-organized ...
Q He (7930655), C Deng (13290345), Tong Lin (13098042), J Cheng (7939862), C He (7754612), L Shi (66606), H Cao (5161103)   +6 more
core  

Synthesis and mesomorphic properties of four ring, rod-like fluorene derivatives – the influence of the lateral substitution on mesomorphic properties of 2,7-bis(4-alkylphenyl)-fluorenes

, 2019
This work presents new rod-like compounds being fluorene derivatives linked with other parts of the core at 2 and 7 positions – its synthesis and properties. The fluorene moiety is located in the central position of the four rings molecular core.
Aneta Bombalska (7427294), Ewelina Dmochowska (5958689), Przemysław Kula (5958692)   +2 more
core   +1 more source

Fluorene‐based blue emitters: On the path to electrically pumped organic lasers

FlexMat, EarlyView.
Electrically pumped efficient operation remains unrealized, a major challenge in optoelectronics. Fluorene‐based blue‐emitting semiconductors are promising gain media, thanks to their structural tunability and favorable emission properties. This review summarizes recent advances, highlights their reliability and versatility in lasing, and outlines key ...
Yong Yan, Hao Li, Mengna Yu, Huiyin Wang, Jiangqiang He, Menghan Wu, Quanyou Feng, Linghai Xie   +7 more
wiley   +1 more source