Columnar liquid crystals are composed of disk-shaped aromatic molecules surrounded by flexible si... more Columnar liquid crystals are composed of disk-shaped aromatic molecules surrounded by flexible side chains, where molecules self-assemble in columns and thereby form large surface-oriented domains. These systems are known for their good charge and exciton transport along the columns, with mobilities approaching those of aromatic single crystals. Such semiconducting materials are promising for devices applications, since the output efficiency can be tuned by properly aligning columns. In the work presented here, the synthesis and characterization of a new Zn-phthalocyanine (ZnPc) is described which exhibits remarkable properties, such as hexagonal columnar order, achieved by cooling down from the isotropic phase to room temperature. Such order was confirmed by optical microscopy and X-ray diffraction experiments. Diodes were constructed using spin-coated films, and the conductive properties were investigated by current versus voltage analysis, where mobilities of 10(-3) and 10(-2) cm(2)/(V s) were obtained for the nonannealed and annealed films, respectively.
... Hugo Gallardo a , Corresponding Author Contact Information , E-mail The Corresponding Author ... more ... Hugo Gallardo a , Corresponding Author Contact Information , E-mail The Corresponding Author ,Emerson Meyer a , Adailton J. Bortoluzzi a , Fernando Molin a and Antônio S. Mangrich b. a Departamento de Quı́mica, Universidade Federal de Santa Catarina, CEP-88040-900 ...
New fluorescent liquid crystalline (LC) compounds containing the 2,1,3-benzothiadiazole chromopho... more New fluorescent liquid crystalline (LC) compounds containing the 2,1,3-benzothiadiazole chromophore as the central core substituted with 1,2,4-oxadiazole, 1,2,3-triazole and 1,2-isoxazole heterocycles were synthesised and their mesophases characterised by polarised optical microscopy, differential scanning calorimetry and X-ray diffraction. We observed that the bent angles of the five-membered heterocyclic substituents are crucial in determining the thermal stability of the LC phases formed,
Columnar liquid crystals are composed of disk-shaped aromatic molecules surrounded by flexible si... more Columnar liquid crystals are composed of disk-shaped aromatic molecules surrounded by flexible side chains, where molecules self-assemble in columns and thereby form large surface-oriented domains. These systems are known for their good charge and exciton transport along the columns, with mobilities approaching those of aromatic single crystals. Such semiconducting materials are promising for devices applications, since the output efficiency can be tuned by properly aligning columns. In the work presented here, the synthesis and characterization of a new Zn-phthalocyanine (ZnPc) is described which exhibits remarkable properties, such as hexagonal columnar order, achieved by cooling down from the isotropic phase to room temperature. Such order was confirmed by optical microscopy and X-ray diffraction experiments. Diodes were constructed using spin-coated films, and the conductive properties were investigated by current versus voltage analysis, where mobilities of 10(-3) and 10(-2) cm(2)/(V s) were obtained for the nonannealed and annealed films, respectively.
... Hugo Gallardo a , Corresponding Author Contact Information , E-mail The Corresponding Author ... more ... Hugo Gallardo a , Corresponding Author Contact Information , E-mail The Corresponding Author ,Emerson Meyer a , Adailton J. Bortoluzzi a , Fernando Molin a and Antônio S. Mangrich b. a Departamento de Quı́mica, Universidade Federal de Santa Catarina, CEP-88040-900 ...
New fluorescent liquid crystalline (LC) compounds containing the 2,1,3-benzothiadiazole chromopho... more New fluorescent liquid crystalline (LC) compounds containing the 2,1,3-benzothiadiazole chromophore as the central core substituted with 1,2,4-oxadiazole, 1,2,3-triazole and 1,2-isoxazole heterocycles were synthesised and their mesophases characterised by polarised optical microscopy, differential scanning calorimetry and X-ray diffraction. We observed that the bent angles of the five-membered heterocyclic substituents are crucial in determining the thermal stability of the LC phases formed,
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Papers by F. Molin