Results 201 to 210 of about 46,521 (243)

Nucleophilic Vinylic Substitution of 2,2‐Diaryl‐Substituted 1‐Chlorovinyl p‐Tolyl Sulfoxides With Alkynyllithiums

European Journal of Organic Chemistry, EarlyView.
A nucleophilic vinylic substitution (SNV) reaction of 1‐chlorovinyl p‐tolyl sulfoxides with alkynyllithiums provides a direct route to conjugated enynes. The transformation proceeds with stereochemical retention. Experimental studies and DFT calculations support a concerted SNVπ mechanism. Nucleophilic vinylic substitution (SNV) reactions of 2,2‐diaryl‐
Tsutomu Kimura, Saya Yamamoto, Chie Takase, Yuka Nishimura, Koto Sekiguchi, Tsuyoshi Satoh   +5 more
wiley   +1 more source

A Programmable Cut-and-Sew Strategy for Trisulfide Transfer in the Synthesis of Cyclic Architectures. [PDF]

J Am Chem Soc
Tian Q, Dai Z, Chen X, Li Z, Li Y.
europepmc   +1 more source

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

Enantio- and regioselective nickel/photoredox-catalyzed cross-electrophile coupling of benzylic aziridines with alkynyl bromides. [PDF]

Sci Adv
Lan H, Xu ZD, Shi Z, Ackermann L, Wang D.   +4 more
europepmc   +1 more source

Counter‐ion modulation: A facile approach toward quenching‐resistant multi‐resonance emitters for efficient narrowband electroluminescence

FlexMat, EarlyView.
Quenching‐resistant carbocation‐based multi‐resonance emitters are developed via a facile counter‐ion modulation strategy, giving much narrowed emission bands under high doping concentrations, and greatly improved device efficiency for solution‐processed narrowband OLEDs by simply increasing the size of counter ions.
Tao Li, Guimin Zhao, Yuanyuan Li, Zhihua Ma, Zhicai Chen, Fangfang Huang, Ronghao Yang, Wei Jiang, Xin Ai, Shiyang Shao   +9 more
wiley   +1 more source

Bridged scaffold editing of carbocycles and heterocycles. [PDF]

Nat Commun
Li J, Yang Y, Dai Z, Chen S, Xiong S, Li G, Zeng L, Cui S.   +7 more
europepmc   +1 more source

Architecting nano‐Al/HMX/CuO energetic micro‐units unlocks superior interface and highly efficient combustion

InfoMat, EarlyView.
Improving the dispersion of nano‐aluminum is of great importance in explosives and propellants. The spherical Al/HMX/CuO energetic micro‐units were prepared using microchannel technology, which significantly improved the uniformity and dispersion of nano‐Al. It also enhanced the mass and heat transfer efficiency between the fuel and oxidizer components,
Gazi Hao, Tianxu Xi, Yong Kou, Cheng Zhang, Ronghuan Yang, Jiahao Yu, Qiangqiang Lu, Hongyu Yang, Chong Chen, Lei Xiao, Jun Di, Fengqi Zhao, Wei Jiang   +12 more
wiley   +1 more source

Tryptophan triggers the production of anthranilamide and quinazolinone derivatives in <i>Streptomyces</i> sp. PC4-3. [PDF]

RSC Adv
Pooprasert T, Feliciano MA, Sureram S, Aree T, Leerach N, Chutiwitoonchai N, Tanasupawat S, Yao Y, Liu G, Mahidol C, Ruchirawat S, Kittakoop P.   +11 more
europepmc   +1 more source

1 W Single‐Mode Large‐Area Edge‐Emitting Laser via Non‐Hermitian Spatial Mode Filtering

Laser &Photonics Reviews, EarlyView.
We demonstrate a non‐Hermitian spatial mode filtering approach for achieving high‐power single‐mode operation in large‐area edge‐emitting laser diodes. By symmetrically coupling passive filter arrays to the main lasing waveguide, higher‐order transverse modes are effectively suppressed while preserving the fundamental mode.
Ece Karabey, Babak Olyaeefar, Mohammadmahdi Alizadeh, Ramy El‐Ganainy, Abdullah Demir   +4 more
wiley   +1 more source

Non-macrocyclic molecular design enables cavity-adaptive cocrystals with high elasticity and low-threshold lasing. [PDF]

Nat Commun
Feng Z, Zhu Y, Han C, Ni H, Zhang L, Wei C, Chen X, Meng Z, Zhao Y, Zhao Y, Lei Y.   +10 more
europepmc   +1 more source