Results 111 to 120 of about 24,479 (307)

Invisible near‐infrared thermo‐stimulated luminescence from carbon dots enabled by stepwise energy transfer for concealed information encryption

Responsive Materials, EarlyView.
A fully metal‐free near‐infrared (NIR) thermo‐stimulated luminescent system is developed by embedding carbon dots into a carbon nitride matrix and integrating multistage Förster resonance energy transfer. The system exhibits long‐term charge retention, rewritable optical memory, and highly concealed NIR readout, promising for secure data encryption and
Kai Jiang, Jun Jiang, Zihan Cheng, Hao Cui, Jingmin Zhang, Hengwei Lin   +5 more
wiley   +1 more source

Synthesis and NMR spectroscopic studies of Allylsulfanyl-N1-alkyl-N4-phenyl-1,4-phenylenediamines and their Cyclization Products, 2,3-Dihydro-1-benzothiophenes and Thiochromans [PDF]

, 2004
Regioselective addition of allylmercaptan at the C-3 position adjacent to the nitrogen carrying phenyl group of the 1,4-phenylenediamine moiety of 1−4 was rigorously confirmed by the 1D NOE difference in combination with gHMBC experiments.
Steel, P.J., Akhmedov, N.G., Katritzky, A.R., Rostek, C.J., Wang, M.   +4 more
core   +1 more source

Efficient water‐soluble blue/red‐emissive carbon dots matching plant absorption spectra: Synthesis, tunable control, and their applications in promoting plant growth

Responsive Materials, EarlyView.
Guided by the spectral demand of plant photosystems, this review summarizes the synthesis, emission regulation, dual‐emission design, and gram‐scale production of CDs for agricultural applications. Spectrally matched blue‐ and red‐emissive CDs enhance plant light utilization by converting underutilized light into photosynthetically active radiation and
Yijing Chen, Ziyue Mu, Haoran Zhang, Xuejie Zhang, Wei Li, Bingfu Lei   +5 more
wiley   +1 more source

Efficient TCT-catalyzed Synthesis of 1,5-Benzodiazepine Derivatives under Mild Conditions

Molecules, 2008
2,4,6-Trichloro-1,3,5-triazine (TCT) efficiently catalyzed the condensation reactions between 1,2-diamines and various enolizable ketones to afford 1,5-benzodiazepines in good to excellent yields.
Ching-Fa Yao, Veerababurao Kavala, Chun-Chao Wang, Chun-Wei Kuo   +3 more
doaj   +1 more source

Experimental validation of Marcus theory for outer-sphere heterogeneous electron-transfer reactions: the oxidation of substituted 1,4-phenylenediamines.

, 2004
Rate constants depend on molecular size: Results are presented to validate the relationship between molecular size and the standard electrochemical rate constant predicted by Marcus theory (see graphic).
Clegg, A.D., Coles, B.A., Clegg, AD, Compton, RG, Rees, NV, Klymenko, OV, Compton, R.G., Rees, N.V.; id_orcid, Klymenko, O.V., Coles, BA, Compton, Richard   +10 more
core   +1 more source

Carbonized polymer dots with aqueous‐stable room‐temperature phosphorescence: Mechanism, matrix engineering, and application

Responsive Materials, EarlyView.
This review focuses on inorganic and organic matrices that enable aqueous‐stable room‐temperature phosphorescence (RTP) in carbonized polymer dots (CPDs). It explains the underlying RTP mechanisms, highlights how matrix engineering provides spatial confinement and bonding interactions to stabilize triplet excitons in water, and demonstrates key ...
Yuhan Hou, Chengyu Zheng, Songyuan Tao, Yuzhuo Wang, Bai Yang   +4 more
wiley   +1 more source

Metal-catalyzed coupling/carbonylative cyclizations for accessing dibenzodiazepinones: an expedient route to clozapine and other drugs

Beilstein Journal of Organic Chemistry
A sequential strategy to access 10,11-dihydro-5H-dibenzo[b,e][1,4]diazepinones (DBDAPs) is disclosed in this article through a palladium and copper-catalyzed amination (Buchwald–Hartwig (B–H) or Chan–Lam (C–L)) followed by a palladium-catalyzed ...
Amina Moutayakine, Anthony J. Burke
doaj   +1 more source

Carbon dots in electrochemiluminescence: Mechanisms, interface engineering, and bioanalytical applications

Responsive Materials, EarlyView.
Carbon dots are emerging as versatile electrochemiluminescent nanomaterials whose structure, surface states, and interfacial design jointly determine ECL pathways and performance. This review highlights how mechanistic understanding and materials engineering enable programmable CD‐ECL systems for bioanalysis, imaging, and future intelligent analytical ...
Yuhan Zhao, Zixuan Chen, Jun‐Jie Zhu
wiley   +1 more source

Network Toxicology and Molecular Docking to Elucidate the Mechanisms of Intestinal Toxicity Induced by P-Phenylenediamine Antioxidants and Their Quinone Derivatives

Toxics
P-phenylenediamines (PPDs) and their quinone derivatives (PPDQs), emerging pollutants widespread in urban environments, exhibit biotoxicological risks.
Hui Zou, Yumei Tan, Xiyi Ren, Zhu Li, Yongxiang Liu   +4 more
doaj   +1 more source

Carbon dots as a smart nanoplatform for the blood‐brain barrier penetration and ischemic stroke therapy

Responsive Materials, EarlyView.
This review presents the structure and transport routes of the blood‐brain barrier, summarizes the ischemic stroke pathophysiological cascade, and discusses the BBB‐crossing mechanisms and multitarget therapeutic effects of carbon dots, demonstrating their promising theranostic potential for ischemic stroke.
Yanhan Huang, Xuan Hou, Haiping Zhao, Qi Kong, Xiayan Wang, Xiaokun Geng, Zaicheng Sun   +6 more
wiley   +1 more source