Nickel Schiff-base complexes immobilized on boehmite nanoparticles and their application in the oxidation of sulfides and oxidative coupling of thiols as novel and reusable nano organometal catalysts
Ni-complex-boehmite was prepared in water at room temperature using commercially available materials and applied as an efficient nanocatalyst in the oxidation of sulfides and thiols.
Guanidine complex of copper supported on boehmite nanoparticles as practical, recyclable, chemo and homoselective organic–inorganic hybrid nanocatalyst for organic reactions
Afterwards, a newcomplex of copper was immobilized on BO‐NPs (Cu‐Guanidine@BO‐NPs). This heterogeneous nanocatalyst was used as a practical, recyclable, chemo and homoselectivenanocatalyst in the organic processes, i.e. the preparation of tetrazole five‐membered heterocycles and chemoselective sulfoxidation of sulfides using H2O2 as oxidant. In this sense, the prepared nanocatalyst was characterized
通过在室温下将NaOH水溶液注入硝酸铝水溶液中来制备勃姆石(BO)纳米粒子(NPs)。之后,将新的铜络合物固定在BO-NP上(Cu-Guanidine @ BO-NPs)。这种非均相纳米催化剂在有机过程中被用作实用,可回收,化学和均选择性的纳米催化剂,即使用H 2 O 2作为氧化剂制备四唑五元杂环和硫化物的化学选择性硫氧化。从这个意义上讲,制备的纳米催化剂的特征在于AAS,N 2吸附-解吸等温线,WDX,EDS,SEM和TGA技术。在描述的有机反应中对这种催化剂的可重复使用性进行了几次试验,没有明显降低其催化活性。此外,所有四唑和亚砜衍生物均以高周转数(TON)和周转频率(TOF)数分离,表明在上述反应中Cu-Guanidine @ BO-NPs具有高活性和选择性。
Modification of boehmite nanoparticles with Adenine for the immobilization of Cu(II) as organic–inorganic hybrid nanocatalyst in organic reactions
applied as highlyefficient and reusable nanocatalyst in carbon–carbon coupling reactions between various aryl halides and sodium tetraphenyl borate, phenylboronic acid, or 3,4-diflorophenylboronic acid under aerobic conditions, palladium-free and phosphine-free ligand. Also this catalyst was applied for the synthesis of polyhydroquinolinederivatives. In continuation, selective oxidation of sulfides to sulfoxides
DIBENZORYLENETETRACARBOXIMIDES AS INFRARED ABSORBERS
申请人:Koenemann Martin
公开号:US20100048904A1
公开(公告)日:2010-02-25
Dibenzorylenetetracarboximides of the general formula I
in which the variables are each defined as follows:
R′ are identical or different radicals:
hydrogen; optionally substituted aryloxy, arylthio, hetaryloxy or hetarylthio;
R are identical or different radicals:
hydrogen; optionally substituted C
1
-C
30
-alkyl, C
3
-C
8
-cycloalkyl, aryl or hetaryl;
m, n are each independently 0 or 1.
LIQUID CRYSTALLINE RYLENE TETRACARBOXYLIC ACID DERIVATIVES AND USE THEREOF
申请人:Koenemann Martin
公开号:US20110042651A1
公开(公告)日:2011-02-24
The present invention relates to liquid-crystalline rylenetetracarboxylic acid derivatives, to processes for their preparation and to their use as n-type organic semiconductors for producing organic field-effect transistors and solar cells.