نتایج جستجو برای: copolyamide imides

تعداد نتایج: 737  

2004
Erin K. Todd Sheng Wang Xinhua Wan Zhi Yuan Wang

A series of chiral aromatic imides and diimides were synthesized and their electrochemical, absorption, fluorescent, and chiroptical properties were examined for their potential application as molecular chiroptical switches. These compounds exhibit strong UV–vis absorptions, and can be electrochemically reduced to radical anions that absorb in the near infrared (NIR) region. Further reduction t...

Journal: :Chemistry, an Asian journal 2012
Toshihiro Okamoto Tsuyoshi Suzuki Hideyuki Tanaka Daisuke Hashizume Yutaka Matsuo

We have designed and synthesized a new donor/acceptor-type tetracene derivative by the introduction of dicarboxylic imide and disulfide groups as electron-withdrawing and -donating units, respectively. The prepared compounds, tetracene dicarboxylic imide (TI) and its disulfide (TIDS) have high chemical and electrochemical stability as well as long-wavelength absorptions of up to 886 nm in the t...

Journal: :Chemical communications 2015
Annike Weissenstein Frank Würthner

Two new perylene bisimide (PBI) derivatives possessing crown ether receptors at the 1,7 bay-positions and solubilizing ionic imide substituents were synthesized and their self-assembly properties in the presence of different metal ions were studied, revealing highly selective barium ion templated self-assembly of 15-crown-5 functionalized PBI into H-type dimer aggregates.

Journal: :Chemical communications 2012
Amanda L Smeigh Loïc Le Pleux Jérôme Fortage Yann Pellegrin Errol Blart Fabrice Odobel Leif Hammarström

Ultrafast recombination observed from several perylene imide sensitizers bound to NiO appears to align with Marcus normal region behaviour; this indicates recombination to intra-bandgap states.

Journal: :Organic & biomolecular chemistry 2009
Grzegorz Cholewinski Jaroslaw Chojnacki Jerzy Pikies Janusz Rachon

2-Amino-2-seleno-5,5-dimethyl-1,3,2-dioxaphosphorinane reacts with acyl chlorides (4-chlorobenzoyl chloride or pivaloyl chloride) yielding the respective N-acyl selenophosphoramides. These derivatives do not isomerise to the related selenocarbonyl imides. X-ray study of N-(4-chlorobenzoyl)-2-amino-2-seleno-5,5-dimethyl-1,3,2-dioxaphosphorinane indicates that the selenium atom is placed in the e...

Journal: :Chemical communications 2011
Riccardo Mossetti Tracey Pirali Dèsirèe Saggiorato Gian Cesare Tron

Up to now, the synthesis of quinazolinones has required lengthy synthetic procedures. Here, we describe an innovative one-pot multicomponent reaction leading to highly substituted quinazolinones. We believe that this novel transformation may open the door for the generation of new and pharmacologically active quinazolinones, but, most important of all, the resurrection of the imide-Ugi scaffold...

2013
Ray J. Butcher Solomon Berhe Alan J. Anderson Oladapo Bakare

In the title compound, C18H18ClNO4, the imide group with its two alkyl substituents is approximately perpendicular to the plane of the naphtho-quinone ring system [dihedral angle = 78.5 (1)°]. Further, the imide carbonyl groups are oriented in an anti sense. In the crystal, the substituted naphtho-quinone rings form π-π stacks in the a-axis direction [perpendicular centroid-centroid distance = ...

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