Listar Ciencias Exactas y Naturales por autor "Merlo, Aloir Antonio"
Mostrando ítems 1-15 de 15
-
3-arylisoxazolyl-5-carboxylic acid and 5-(hydroxymethyl)-3-aryl-2-isoxazoline as molecular platforms for liquid-crystalline materials
Tavares, Aline; Livotto, Paolo Roberto; Goncalves, Paulo Fernando Bruno; Merlo, Aloir Antonio (2009) [Artículo de periódico]A síntese de uma plataforma molecular para materiais líquido-cristalinos derivados do ácido 3-arilisoxazolil-5-carboxílico (1) e do 5-(hidroximetil)-3-aril-2-isoxazolina (2) é descrita. Os intermediários 1 e 2 são obtidos ... -
An evaluation of the chalcogen atom effect on the mesomorphic and electronic properties in a new homologous series of chalcogeno esters
Rampon, Daniel da Silveira; Rodembusch, Fabiano Severo; Lourega, Rogerio Vescia; Merlo, Aloir Antonio; Schneider, Paulo Henrique; Goncalves, Paulo Fernando Bruno (2010) [Artículo de periódico]A series of chalcogeno esters 1a, 6a and 6b have been synthesized in a straightforward manner. Polarized-light optical microscopy (POM) and differential scanning calorimetry (DSC) showed that these chalcogeno esters displayed ... -
An old dog with new tricks : schiff bases for liquid crystals materials based on isoxazolines and isoxazoles
Fritsch, Luma; Merlo, Aloir Antonio (2016) [Artículo de periódico]Schiff bases are in action again showing an exuberant mesophase range despite their chemical and thermal weakness. Two series of Schiff bases (SB), based on isoxazolines 9 a–f and isoxazoles 10 a–f, are described. 9 a–f ... -
Chiral liquid-crystalline polyacrilates from (S)-(-)-2-methyl-1-butanol: Synthesis, mesomorphic properties and light scattering
Merlo, Aloir Antonio; Ritter, Olga Maria Schimidt; Pereira, Fabiano Vargas; Vieira, Carolina Helena; Silveira, Nádya Pesce da (2001) [Artículo de periódico]A síntese e o comportamento mesomórfico de dois poliacrilatos quirais líquido cristalinos com cadeia lateral derivados do (S)-(-)-2-metil-1-butanol são descritos. Estes novos poliacrilatos quirais mostram dependência das ... -
Cristais líquidos ferroelétricos CLF : uma abordagem sintética
Merlo, Aloir Antonio; Gallardo, Hugo Alejandro Olmedo; Taylor, Ted Ray (2001) [Artículo de periódico]Synthetic methods used for the synthesis of the Ferroelectric Liquid Crystals (FLCs) will be considered with emphasis on the chiral synthesis methodologies and mesomorphic electrooptical properties. -
Quinolines by three-component reaction : synthesis and photophysical studies
Sales, Eric Souza; Schneider, Juliana Maria Forain Miolo; Santos, Marcos José Leite; Bortoluzzi, Adailton João; Cardoso, Daniel Rodrigues; Santos, Willy Glen; Merlo, Aloir Antonio (2015) [Artículo de periódico]The synthesis of five quinolines 8-octyloxy-4-[4-(octyloxy)phenyl]quinoline and 6-alkoxy- 2-(4-alkoxyphenyl)-4-[(4-octyloxy)aryl]quinolines are described by three-component coupling reaction mediated by Lewis acid FeCl3 ... -
Reação de condensação do glicerol com compostos carbonílicos : síntese, caracterização e aplicação em cristais líquidos
Kautz, Jacqueline; Feltrin, Carlos Willian; Sales, Eric Souza; Eifler-Lima, Vera Lucia; Merlo, Aloir Antonio (2015) [Artículo de periódico]Condensation reactions of glycerol with aldehydes and ketones were performed under thermal heating and microwave irradiation regimes. Homogeneous and heterogeneous catalysts were tested in both conditions. A silica sulfated ... -
Side-chain liquid-crystalline polymer tetrazoles : synthesis and characterization
Tariq, Muhammad; Hameed, Shahid; Magnago, Rachel Faverzani; Bechtold, Ivan Helmuth; Merlo, Aloir Antonio (2014) [Artículo de periódico]The synthesis and phase behavior of three new side-chain liquid crystal polymers with short and long flexible alkyl spacers are described. These new materials show smectic C (SmC) mesophase. X-ray analysis for two samples ... -
Síntese e caracterização de copolímeros de cadeia lateral derivados de acrilatos de 4,5-di-hidroisoxazol e do (-)-mentol
Passo, Joel Aparecido; Merlo, Aloir Antonio; Eccher, Juliana; Bechtold, Ivan Helmuth; Kelly, Stephen M. (2012) [Artículo de periódico]Five monomers 5-[4-(5-cyano-4,5-dihydroisoxazol-3-yl)phenoxy]undecyl acrylate (7a); n-alkyl 3-{4-[5-(acryloyloxyundecyl) oxyphenyl]}-4,5-dihydroisoxazole-5-carboxylate (7b,c for n-butyl and n-hexyl, respectively); ... -
Structure-property relationships of smectic liquid crystalline polyacrylates as revealed by SAXS
Pereira, Fabiano Vargas; Borsali, Redouane; Ritter, Olga Maria Schimidt; Goncalves, Paulo Fernando Bruno; Merlo, Aloir Antonio; Silveira, Nádya Pesce da (2006) [Artículo de periódico]A influência da estrutura química dos grupos mesogênicos e do tamanho dos grupos espaçadores, no comportamento de fase de uma série de cristais líquidos poliméricos de cadeia lateral (SCLCP), foram estudados utilizando-se ... -
Synthesis and characterization of some novel tetrazole liquid crystals
Tariq, Muhammad; Hameed, Shahid; Bechtold, Ivan Helmuth; Bortoluzzi, Adailton João; Merlo, Aloir Antonio (2013) [Artículo de periódico]The synthesis and characterization of new 4-[(2-alkyl)-2H-tetrazol-5-yl]phenyl 4-alkyloxybenzoates (5a–i) and 5-{4-[(4-substituted)benzyloxy]phenyl}-2-alkyl-2H-tetrazoles (7a–e) are reported. The reported tetrazoles contain ... -
Synthesis and mesomorphic properties of side chain liquid-crystalline biphenyl-phenyl polyacrylates
Ritter, Olga Maria Schimidt; Silveira, Nádya Pesce da; Merlo, Aloir Antonio (2006) [Artículo de periódico]A síntese e a caracterização de dois cristais líquidos poliacrilatos, de cadeia lateral contendo o sistema bifenil-fenila como unidade central são descritos. A cadeia terminal é derivada da L-isoleucina. Em cada caso, o ... -
Synthesis and thermal behavior of new liquid crystals arylaldoxime esters
Tavares, Aline; Arruda, Bárbara Campiol; Böes, Elvis Sidnei; Stefani, Valter; Stassen, Hubert Karl; Campo, Leandra Franciscato; Bechtold, Ivan Helmuth; Merlo, Aloir Antonio (2012) [Artículo de periódico]Uma série de cristais líquidos derivados de ésteres arilaldoximas foi sintetizada e caracterizada via espectroscopia de 1H, 13C RMN, ATR/IV-FT e análise elementar. A estabilidade química e fotofísica desses compostos foram ... -
Synthesis of new family of thiazoline and thiazole esters and investigation of their thermal properties
Schneider, Juliana Maria Forain Miolo; Sales, Eric Souza; Livotto, Paolo Roberto; Schneider, Paulo Henrique; Merlo, Aloir Antonio (2014) [Artículo de periódico]A new family of thiazoline and thiazole esters has been synthesized and their thermal properties are presented and discussed. Thiazoline esters were obtained by cyclization reaction from 4-substituted benzenenitrile and ... -
The 1,3-dipolar cycloaddition of nitrile oxide to vinylacetic acid : computational study of transition states selectivity, solvent effects, and bicyclo formation
Toldo, Josene Maria; Merlo, Aloir Antonio; Goncalves, Paulo Fernando Bruno (2016) [Artículo de periódico]The 1,3-dipolar cycloaddition reaction is a powerful tool for the cycloaddition of nitrile oxides to olefins, and this reaction is of considerable interest to obtain isoxazolines. Density functional theory (DFT) was used ...