Results 101 to 110 of about 76,034 (306)

Condensation of Triethoxysilyl-Terminated Polystyrene by Basic Catalysts.

KOBUNSHI RONBUNSHU, 1992
トリエトキシシリル末端ポリスチレン (TESi-PS) の縮合反応をいろいろなアルカリ触媒を用いて行った. 縮合反応は, アミンのような弱アルカリを触媒とした場合にはほとんど起こらず, 水酸化アルカリなどの強アルカリの場合に進行した. 強アルカリによる縮合反応の時間一縮合物生成率曲線には極大値が存在し, 長時間の反応で縮合物の生成率はゼロとなった. 例えば, NaOH触媒では縮合物の生成率は, 60℃4時間の反応で62%に達するが, 24時間以内には見かけ上ゼロとなった. これは, いったん生成した縮合物からポリスチレン部が脱離する反応が副反応として起こるためであることがわかった.
SUZUKI, Keita, KATSUMURA, Gunpei, KONDO, Yoshiharu, OKU, Jun-ichi, TAKAKI, Mikio   +4 more
openaire   +2 more sources

Tuning Amorphous‐Crystalline Catalytic Interfaces by Mechanochemistry: Cu‐Based Metallic Glasses Coupled with Ceria for CO Oxidation

Advanced Materials, EarlyView.
Ball‐milling Cu‐based metallic glasses with ceria creates a unique nanostructure where metallic glass particles are wrapped by CeO2 nanoparticles. The intimate integration triggers copper state reorganization during reaction and aging, boosting CO oxidation and COPrOx activity.
Maahin Mirzay‐Shahim, Mehran Nabahat, Laia Pascua‐Solé, Isabel Serrano, Ilaria Lucentini, Xènia Garcia, Marina Armengol‐Profitós, Asier Agrelo‐Lestón, Ignasi Burgués‐Ceballos, Núria J. Divins, Ignacio J. Villar‐Garcia, Virginia Pérez‐Dieste, Carlos Escudero, Carlo Marini, Jordi Llorca, Eloi Pineda, Pere Bruna, Lluís Soler   +17 more
wiley   +1 more source

Mesoporous Silica Nanoparticles in Biomedicine: Advances and Prospects

Advanced Materials, EarlyView.
Mesoporous silica nanoparticles offer unique properties like high surface area, tunable pores, and functionalization. They excel in drug delivery, tissue engineering, and stimuli‐responsive therapies, enabling targeted and controlled treatments. With roles in cancer therapy and diagnostics, their clinical translation requires addressing challenges in ...
Miguel Manzano, María Vallet‐Regí
wiley   +1 more source

2D Co‐Mo‐Hydroxide‐Based Multifunctional Material for the Development of H2‐Based Clean Energy Technologies

Advanced Materials, EarlyView.
2D α‐Co(OH)2 interleaved with Mo species displays an appealing dual functionality for the production and use of green hydrogen.Mo incorporation greatly benefits the electrochemical behaviour in Oxygen Evolution Reaction for H2 production, while the magnetocaloric response at liquid H2 temperature paves the way for alternative cryogenic refrigerants ...
Daniel Muñoz‐Gil, Celia Castillo‐Blas, Dawid Krystian Feler, Isabel Gómez‐Recio, Miguel Tinoco, Ana Querejeta‐Fernández, Rodrigo González‐Prieto, Felipe Gándara, Romualdo Santos Silva Jr, Pilar Ferrer, Carlos Prieto, Luc Lajaunie, José Luis Martinez‐Peña, María Luisa Ruiz‐González, José María González‐Calbet   +14 more
wiley   +1 more source

A study of the photocatalytic degradation of the textile dye CI Basic Yellow 28 in water using a P160 TiO2-based catalyst [PDF]

, 2012
The photocatalytic degradation of the synthetic textile dye CI Basic Yellow 28 (BY28) in water, using a recently synthesized P160 TiO2-based catalyst, under Osram ultra-vitalux (R) lamp (300 W) light, was studied.
Marinković, Aleksandar D., Đokić, Veljko R., Janaćković, Đorđe T., Vujovic, Jelena, Petrovic, Rada, Onjia, Antonije E., Mijin, Dušan Ž.   +6 more
core   +1 more source

OTIMIZAÇÃO DO PROCESSO DE TRANSESTERIFICAÇÃO EM DUAS ETAPAS PARA PRODUÇÃO DE BIODIESEL ATRAVÉS DO PLANEJAMENTO EXPERIMENTAL DOEHLERT

Química Nova, 2016
In this work, Doehlert experimental design was used to optimize the Transesterification Double Step Process (TDSP) method of methyl soybean oil biodiesel production which starts with a basic catalysis followed by an acidic catalysis.
Carla F. C. Ruschel, Marco F. Ferrão, Francisco P. Dos Santos, Dimitrios Samios   +3 more
doaj   +1 more source

Azaporphyrinoid‐Based Photo‐ and Electroactive Architectures for Advanced Functional Materials

Advanced Materials, EarlyView.
A long‐standing collaboration between the Torres and Guldi groups has yielded diverse azaporphyrinoid‐based donor‐acceptor nanohybrids with promising applications in solar energy conversion. This conspectus highlights key molecular platforms and structure‐function relationships that govern light and charge management, supporting the rational design of ...
Jorge Labella, Kobra Azizi, Dirk M. Guldi, Tomás Torres   +3 more
wiley   +1 more source

Dynamic combinatorial libraries of complexes with oligopyridine ligands [PDF]

, 2006
Chapter 1 gives a background of some achievements reached in the fields of dynamic combinatorial libraries, 2,2´-bipyridine and 2,2´:6´,2´´-terpyridine chemistry, and ferrocenes compounds in the years preceding the present work.
Brisig, Barbara
core   +1 more source

In Situ Amine Formation to Modulate MOF‐Derived PdIn N‐Doped Carbon Catalysts

Advanced Materials, EarlyView.
An amine‐assisted approach converts PdIn‐MOF into PdIn intermetallic nanoparticles embedded in N‐doped carbon. In situ‐generated amines trigger early Pd nucleation, producing smaller PdIn domains than direct pyrolysis. Amine sterics and basicity tune composition and particle size, while solvent and amine co‐determine textural features.
Gonzalo Egea, Jordan Santiago Martinez, M. Asunción Molina, Jaime Mazarío, Lucy Costley‐Wood, Christian Cerezo‐Navarrete, Carlo Marini, Eduardo Villalobos‐Portillo, Andrew M. Beale, Pascual Oña‐Burgos   +9 more
wiley   +1 more source

A CaMnAl-hydrotalcite solid basic catalyst toward the aldol condensation reaction with a comparable level to liquid alkali catalysts [PDF]

, 2018
A CaMnAl-hydrotalcite solid basic catalyst was prepared based on the memory effect of LDHs, which exhibited extremely high heterogeneous catalytic performance toward the aldol condensation reaction.
Bin Wang, Weihan Bing, Lei Zheng, Deming Rao, Yangdong Wang, Min Wei, Yusen Yang, Lirong Zheng, Huimin Wang   +8 more
core   +1 more source