PERSONAL DE APOYO
CURCIO Sergio Fernando
artículos
Título:
Strongly luminescent and liquid-crystalline π-conjugated 2-methyl[1,2,3]benzotriazoles with a linear donor-acceptor-donor structure
Autor/es:
DA SILVA, ELIAS REGIS; HINOJOSA, ABAD ROGER CASTILLO; ECCHER, JULIANA; TONET, MICHELE DUARTE; BRONDANI, DANIELA; ZAPP, EDUARDO; CURCIO, SERGIO FERNANDO; POSTACCHINI, BRUNA BUENO; CAZATI, THIAGO; VIEIRA, ANDRÉALEXANDRE
Revista:
JOURNAL OF MOLECULAR LIQUIDS
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Año: 2020 vol. 314
ISSN:
0167-7322
Resumen:
Symmetrical 2-methyl[1,2,3]benzotriazole (BZT) derivatives with elongated peripheral units connected via acetylenic triple bonds present calamitic thermotropic mesomorphism with nematic and smectic phases. They show intense photoluminescence with near-unity quantum yields in solution. The peripheral groups significantly influence the excited-state lifetime. Fluorescence quenching is observed in the presence of C60, testifying of charge transfer to the fullerene acceptor. The varying sterical demand of the different substituents considerably influences the efficiency of the charge transfer induced fluorescence quenching. HOMO, LUMO and band gap energies ranged from −5.15 to −5.97 eV (ionization potential), −2.47 to −2.96 eV (electron affinity) and 2.68 to 3.08 eV (optical band gap).
