Synthesis and electroluminescent properties of new amorphous cyclohexyl- and hexyl-substituted ter(9,9-dialkylfluorene)s

Eunhee Lim; Byung Jun Jung; Sung Min Kim; Bong Ok Kim; Hong Ku Shim

doi:10.1246/cl.2008.686

Synthesis and electroluminescent properties of new amorphous cyclohexyl- and hexyl-substituted ter(9,9-dialkylfluorene)s

Eunhee Lim, Byung Jun Jung, Sung Min Kim, Bong Ok Kim, Hong Ku Shim

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Abstract

A series of ter(9,9-dialkylfluorene)s (TFs) containing cyclohexyl and hexyl side groups has been synthesized via the Suzuki coupling reaction. Their chemical structures were characterized by ¹HNMR and ¹³CNMR. All TFs were soluble in common organic solvents and showed good thermal stability up to 400 °C. In particular, T(CHC)F composed of two 9,9-bis(cyclohexylmethyl)fluorenes and one dihexylfluorene showed improved thermal stability over T(HHH)F and was found to be amorphous, unlikely with T(CCC)F. A light-emitting diode device fabricated with an ITO/2-TNATA/NPB/TFs/ Alq₃/Liq/ Al configuration exhibited blue light emission with EL maxima at 450 nm and EL efficiency of 1.1 cd/A.

Original language	English
Pages (from-to)	686-687
Number of pages	2
Journal	Chemistry Letters
Volume	37
Issue number	7
DOIs	https://doi.org/10.1246/cl.2008.686
State	Published - 5 Jul 2008

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title = "Synthesis and electroluminescent properties of new amorphous cyclohexyl- and hexyl-substituted ter(9,9-dialkylfluorene)s",

abstract = "A series of ter(9,9-dialkylfluorene)s (TFs) containing cyclohexyl and hexyl side groups has been synthesized via the Suzuki coupling reaction. Their chemical structures were characterized by 1HNMR and 13CNMR. All TFs were soluble in common organic solvents and showed good thermal stability up to 400 °C. In particular, T(CHC)F composed of two 9,9-bis(cyclohexylmethyl)fluorenes and one dihexylfluorene showed improved thermal stability over T(HHH)F and was found to be amorphous, unlikely with T(CCC)F. A light-emitting diode device fabricated with an ITO/2-TNATA/NPB/TFs/ Alq3/Liq/ Al configuration exhibited blue light emission with EL maxima at 450 nm and EL efficiency of 1.1 cd/A.",

author = "Eunhee Lim and Jung, {Byung Jun} and Kim, {Sung Min} and Kim, {Bong Ok} and Shim, {Hong Ku}",

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T1 - Synthesis and electroluminescent properties of new amorphous cyclohexyl- and hexyl-substituted ter(9,9-dialkylfluorene)s

AU - Lim, Eunhee

AU - Jung, Byung Jun

AU - Kim, Sung Min

AU - Kim, Bong Ok

AU - Shim, Hong Ku

PY - 2008/7/5

Y1 - 2008/7/5

N2 - A series of ter(9,9-dialkylfluorene)s (TFs) containing cyclohexyl and hexyl side groups has been synthesized via the Suzuki coupling reaction. Their chemical structures were characterized by 1HNMR and 13CNMR. All TFs were soluble in common organic solvents and showed good thermal stability up to 400 °C. In particular, T(CHC)F composed of two 9,9-bis(cyclohexylmethyl)fluorenes and one dihexylfluorene showed improved thermal stability over T(HHH)F and was found to be amorphous, unlikely with T(CCC)F. A light-emitting diode device fabricated with an ITO/2-TNATA/NPB/TFs/ Alq3/Liq/ Al configuration exhibited blue light emission with EL maxima at 450 nm and EL efficiency of 1.1 cd/A.

AB - A series of ter(9,9-dialkylfluorene)s (TFs) containing cyclohexyl and hexyl side groups has been synthesized via the Suzuki coupling reaction. Their chemical structures were characterized by 1HNMR and 13CNMR. All TFs were soluble in common organic solvents and showed good thermal stability up to 400 °C. In particular, T(CHC)F composed of two 9,9-bis(cyclohexylmethyl)fluorenes and one dihexylfluorene showed improved thermal stability over T(HHH)F and was found to be amorphous, unlikely with T(CCC)F. A light-emitting diode device fabricated with an ITO/2-TNATA/NPB/TFs/ Alq3/Liq/ Al configuration exhibited blue light emission with EL maxima at 450 nm and EL efficiency of 1.1 cd/A.

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JO - Chemistry Letters

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Synthesis and electroluminescent properties of new amorphous cyclohexyl- and hexyl-substituted ter(9,9-dialkylfluorene)s

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