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André A. Vieira
Researcher at Federal University of Bahia
Publications - 44
Citations - 1046
André A. Vieira is an academic researcher from Federal University of Bahia. The author has contributed to research in topics: Liquid crystal & Mesophase. The author has an hindex of 17, co-authored 38 publications receiving 902 citations. Previous affiliations of André A. Vieira include Universidade Federal de Santa Catarina.
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Catalytic chalcogenylation under greener conditions: a solvent-free sulfur- and seleno-functionalization of olefins via I2/DMSO oxidant system.
André A. Vieira,Juliano B. Azeredo,Marcelo Godoi,Claudio Santi,Eufrânio N. da Silva Júnior,Antonio L. Braga +5 more
TL;DR: A solvent- and metal-free methodology for the alkoxy-chalcogenylation of styrenes, using molecular iodine as a catalyst, DMSO as a stoichiometric oxidant, and different nucleophiles under microwave irradiation is reported.
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Synthesis and characterization of luminescent hockey stick‐shaped liquid crystalline compounds
TL;DR: In this paper, a general synthetic strategy based on a convergent approach allowed a series of luminescent unsymmetrical bent core compounds (2,5−(disubstituted)−1,3,4−oxadiazole derivatives) via the Sonogashira crosscoupling reaction, all possessing a similar hockey stick shape.
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Luminescent 2,1,3-benzothiadiazole-based liquid crystalline compounds
TL;DR: A series of fluorescent 2,1,3-benzothiadiazole-based liquid crystals bearing a π-extended aromatic portion through C C triple bond was synthesized and characterized.
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Luminescent columnar liquid crystals based on tristriazolotriazine.
Rodrigo Cristiano,Juliana Eccher,Ivan H. Bechtold,Catarina Nardi Tironi,André A. Vieira,Fernando Molin,Hugo Gallardo +6 more
TL;DR: These compounds based on tristriazolotriazine are quite robust with good optical and thermal properties for application as solid state emitters, and it is anticipated that they may provide an interesting alternative to other discotic molecules based on N-heterocycles, which generally present a high-temperature Col(h) phase.
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Synthesis, optical properties and thermal behaviour of 1,3,4‐oxadiazole‐based twin dimers
Rajendra M. Srivastava,Ricardo A. W. Neves Filho,Ricardo Schneider,André A. Vieira,Hugo Gallardo +4 more
TL;DR: In this paper, the synthesis, optical properties and thermal behaviour of five new 1,3,4,oxadiazole-based light-emitting twin dimers are described.