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Synthesis of bifluorene-based molecular materials: effect of C-9 spirocyclohexane functionalization and end-group tailoring |
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| Authors: | Roberto Grisorio Pinalysa Cosma Piero Mastrorilli Gian Paolo Suranna Cosimo Francesco Nobile |
| Institution: | a Dipartimento di Ingegneria delle Acque e di Chimica (DIAC), Politecnico di Bari, via Orabona 4, I-70125 Bari, Italy b National Nanotechnology Laboratories (NNL) of CNR-INFM, Lecce, Italy c Istituto Superiore Universitario di Formazione Interdisciplinare (ISUFI)-sezione Nanoscienze, Lecce, Italy d Dipartimento di Ingegneria dell'Innovazione, Università del Salento, Lecce, Italy e Dipartimento di Chimica dell'Università di Bari, Campus Universitario, Bari, Italy f IPCF-CNR, c/o Dipartimento di Chimica, Bari, Italy |
| Abstract: | The preparation and properties of the first spirocyclohexane-functionalized bifluorene-based monodispersed molecular materials is described. The obtained compounds were characterized by 1H NMR, 13C{1H} NMR, IR, DSC, UV-vis and photoluminescence both in solution and in the solid state. The molecules show emissions ranging from the blue to the blue-green region, and higher glass transition temperatures and spectral stability with respect to the analogous compounds containing 9,9,9′,9′-tetrahexyl-2,2′]-bifluorene core. The materials were used as active layers in electroluminescent devices with ITO/PEDOT-PSS/SB1-4/Ca/Al and ITO/PEDOT-PSS/SB1-4/BCP/Ca/Al configurations. |
| Keywords: | Spiro compounds Alkynes Fluorene Carbazole OLED |
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