Results 101 to 110 of about 2,082 (291)

Synthesis of N,3,5-Substituted 1,4-Phenylenediamines

, 2012
Восстановлением N,3,5-замещенных 4-нитрозоанилинов гидразингидратом на Pd/C получены N-3,5-замещенные 1,4-фенилендиамины. Синтез N-((1-адамантил)метил)-3,5-замещенных 4-нитрозоанилинов впервые осуществлен конденсацией 2-гидроксимино-1,3-дикетонов с ...
Роот, Е.В., Root, Evgeniy V., Gavrilova, Natalya A., Семиченко, Е.С., Kositsyna, Anna S., Suboch, George A., Субоч, Г.А., Косицына, А.С., Гаврилова, Н.А., Semichenko, Elena S.   +9 more
core  

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

Mesityl‐Substituted Azuleno[1′,2′:4,5]pyrrolo[2,3‐b]quinoxalines: Synthesis, Functionalization, Photophysical, and Electrochemical Properties

European Journal of Organic Chemistry, EarlyView.
Azuleno[1′,2′:4,5]pyrrolo[2,3‐b]quinoxaline with a mesityl group as a solubilizing group was synthesized. By synthesizing derivatives in which various functional groups were introduced into two electronically distinct sites, the pyrrole nitrogen atom and the azulene five‐membered ring, we were able to reveal that the photophysical and electrochemical ...
Ryuta Sekiguchi, Hiroki Mizuno, Ikumi Uchiyama, Souta Yuruka, Atsuya Shimizu, Taku Shoji, Shunji Ito   +6 more
wiley   +1 more source

Nationwide distribution, transformation, and risks of p-Phenylenediamines and their quinone transformation products in Chinese agricultural soils

Environment International
p-Phenylenediamines (PPDs) are widely used as antioxidants in tire formulations and are released to the environment via tire wear, where they can be transformed into more toxic p-phenylenediamine-derived quinones (PPD-Qs).
Chao Xu, Lewei He, Wei Wei, Shuren Liu, Xianzhi Huang, Rong Jin, Zili Guo, Shuduan Mao, Dongmei Xu, Xiaohui Sun, Shuang Song, Feng He, Lili Niu, Weiping Liu   +13 more
doaj   +1 more source

Programmable luminescent platform based on carbon quantum dots enables wavelength‐multiplexed optical data storage and encryption

FlexMat, EarlyView.
A carbon‐quantum‐dots (CQDs)‐based programmable luminescent platform is proposed for multidimensional optical information encryption and high‐capacity data storage by leveraging wavelength‐division multiplexing. Furthermore, a prototype tri‐layer optical disk is demonstrated, where data written via laser ablation on different CQD layers are retrieved ...
Honglei Sun, Qingfeng Gui, Yunsong Di, Zihan Ying, Siqi Liu, Mengqi Li, Meng Zhang, Lun Yang, Yushen Liu, Zhixing Gan   +9 more
wiley   +1 more source

The correlations and quantum chemical interpretations of some molecular properties of several p-phenylenediamines and related compounds

, 1987
Quantum chemical calculations of various p-phenylenediamines and related compounds are correlated with different molecular properties, such as electrochemical E1/2-values, ionization potentials, pK-values, UV-VIS spectra, the activation energies of the ...
Günter Grampp, Peter Pluschke
core   +1 more source

Miniaturized Droplet‐Based Adaptation of the Ames Test for High‐Throughput Mutagenicity Assessment

Journal of Applied Toxicology, EarlyView.
ABSTRACT This work presents the first demonstration of a tube‐based droplet microfluidic implementation of the Ames test, bridging single‐droplet resolution with regulatory genotoxicity testing. The Ames test is a cornerstone assay for detecting mutagenicity, but conventional plate‐ and well‐based formats suffer from high reagent consumption, low ...
Jialan Cao, Bayan Nasr, J. Michael Köhler, Sebastian Buchinger   +3 more
wiley   +1 more source

Electrochemical Synthesis and Mechanestic Study of Quinone Imines Exploiting the Dual Character of N,N-Dialkyl-p-phenylenediamines

, 2016
Two one-pot electrochemical approaches for the synthesis of similar quinone imines via either the nucleophilic character of N,N-dialkyl-p-phenylenediamines or electrophilic reactivity of their oxidized forms through Michael-type addition reactions are ...
Abbas Maleki (737724), Davood Nematollahi (1520104)   +1 more
core   +1 more source

Unleashing the power of visible‐near infrared spectroscopy: predicting Golden Delicious apple enzyme activity

Journal of the Science of Food and Agriculture, EarlyView.
Abstract BACKGROUND Enzymatic browning is a significant reaction in fruits that affects their color, appearance, and quality. The quality of apples, as a perishable product, is mainly influenced by the activity of two browning‐related enzymes, polyphenol oxidase (PPO) and peroxidase (POD), during storage.
Tarahom Mesri Gundoshmian, Mahsa Sadat Razavi, Reza Akbari, Mohammad Tahmasebi, Irene Locatelli, Silvia Grassi   +5 more
wiley   +1 more source

Alterations of human lipid profile and mitochondrial DNA copy number induced by PPD exposure

Ecotoxicology and Environmental Safety
As a class of industrial antioxidants, N, N’-substituted p-phenylenediamines (PPDs) find extensive application in rubber product stabilization, leading to significant human exposure and various toxic implications.
Chenchen Wang, Yi Xiong, Hongliang Zheng, Jianli Qu, Weili Mao   +4 more
doaj   +1 more source