Results 31 to 40 of about 1,448,570 (154)

Green Electrochromic Film Formation via Phenylcarbazole Polymerization in Ionic Liquids

Chemistry – A European Journal, Volume 32, Issue 31, 18 August 2026.
The scheme depicts the three‐step electropolymerization of two electrochromic polycarbazole derivatives, 4‐(9H‐carbazol‐9‐yl)phenol and 4‐(3‐methoxy‐9H‐carbazol‐9‐yl)phenol, performed at constant potential using the green ionic liquid BMIM TFSI. This medium enables controlled polymer growth and enhances electrochromic performance, yielding robust and ...
Carolina Gascó, Sara Santiago, Rosa Maria Sebastián, Gonzalo Guirado   +3 more
wiley   +1 more source

Uso da espectroscopia de ressonância magnética nuclear de 1He 13C na análise de uvas e vinhos brasileiros [PDF]

, 2005
Tese (doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências e Matemáticas. Programa de Pós-Graduação em QuímicaUm dos objetivos da química analítica moderna é o desenvolvimento de técnicas capazes de identificar e quantificar diferentes
Amaral, Fabiana Mortimer
core  

A Dynamic Overview of Antimicrobial Peptides and Their Complexes

Molecules, 2018
In this narrative review, we comprehensively review the available information about the recognition, structure, and dynamics of antimicrobial peptides (AMPs).
Viviane Silva de Paula, Ana Paula Valente   +1 more
doaj   +1 more source

Manganese Porphyrin‐Catalyzed One‐Pot Oxidation of Lupeol: Efficient Conversion of Its Terminal Alkene Into Carboxylic Acids

Chemistry &Biodiversity, Volume 23, Issue 5, May 2026.
Manganese porphyrin catalyst enables green PhI(OAc)2 oxidation of lupeol in ethyl acetate, achieving 94% conversion and the formation of eight products, including selective C20 olefin transformations and one‐pot conversion of the isopropenyl group to carboxylic acids, all without the need of C3‐OH protection step.
Leila Renan Oliveira, Pedro Fonseca‐Pinheiro, Lucienir Pains Duarte, Diogo Montes Vidal, Grasiely Faria de Sousa, Dayse Carvalho da Silva Martins   +5 more
wiley   +1 more source

Preparação e caracterização de compostos heterociclicos nitrogenados [PDF]

, 1994
Dissertação (Mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas.A síntese de compostos heterociclos nitrogenados foi desenvolvida através da reação de di e poliaminas com reagentes eletrofílicos como dióxido de ...
Dall'Oglio, Evandro Luiz
core  

Influence of Hornification Treatment and Fiber Length on the Performance of Recycled Polypropylene Composites

Polymer Composites, Volume 47, Issue 5, Page 4793-4803, 10 March 2026.
Study of the influence of hornification treatment and jute and mallow fiber length on the physical, thermal, and mechanical properties of recycled polypropylene (PP) composites. ABSTRACT The growing accumulation of plastic waste has driven its reuse in the development of new composites, with natural fibers emerging as promising reinforcements. However,
Raquel de Sousa Freire, Gabrielle Machado dos Santos, João de Almeida Melo Filho, Holmer Savastano Junior, Virginia Mansanares Giacon   +4 more
wiley   +1 more source

Acompanhamento do amadurecimento e análise do grão de arroz por ressonancia magnética nuclear - RMN [PDF]

, 2009
TCC (graduação) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas, Curso de Química.O arroz é um dos principais cereais cultivados no mundo e a região sul do Brasil se destaca nacionalmente em sua produção.
Savi, Julisse Oker
core  

Aplicações da tomografia de ressonância magnética nuclear como método não-destrutivo para avaliar os efeitos de injúrias mecânicas em goiabas 'Paluma' e 'Pedro Sato' [PDF]

Revista Brasileira de Fruticultura, 2002
Objetivou-se determinar o potencial do uso da tomografia de ressonância magnética, como método não-destrutivo, para avaliar os efeitos das injúrias mecânicas em goiabas.
Ben-Hur Mattiuz, Clovis Isberto Biscegli, José Fernando Durigan   +2 more
doaj   +1 more source

Continuous‐Wave (CW) Photo‐CIDNP NMR Spectroscopy: A Tutorial

Magnetic Resonance in Chemistry, Volume 63, Issue 12, Page 1020-1034, December 2025.
ABSTRACT Photo‐chemically induced dynamic nuclear polarisation (photo‐CIDNP) is a nuclear spin‐selective magnetic resonance phenomenon that has traditionally been used to mechanistically study chemical reactions involving the (transient) formation of radical molecular species, extract EPR observables of short‐lived radicals, probe biomolecular ...
Lars T. Kuhn, Míriam Pérez‐Trujillo
wiley   +1 more source

Mechanistic Insights and Catalytic Efficiency of a 2,2′‐Bipyridine–Coordinated Peroxidovanadium Complex as a Haloperoxidase Biomimetic

ChemPlusChem, Volume 90, Issue 11, November 10, 2025.
A peroxidovanadium(V) complex mimics vanadium haloperoxidases for eco‐friendly halogenation of organic substrates. Density functional theory studies reveal two major reaction pathways for iodide/bromide oxidation. The catalyst offers high‐yield bromination/iodination of 8‐hydroxyquinoline (73/86%) under mild conditions (30 °C, pH 5.8), and it also ...
Lucas G. Fachini, Enzo V. S. Elisandro, Gabriel B. Baptistella, Rúbia C. R. Bottini, Matteo Briganti, Giovana G. Nunes, Eduardo L. de Sá   +6 more
wiley   +1 more source