Synthesis and optoelectronic properties of a series of novel spirobifluorene derivatives starting from the readily available reagent 4,4′-bisalkylated biphenyl

[Display omitted] ► Novel spirobifluorene derivatives were synthesized starting from the readily available reagent 4,4′-bisalkylated biphenyl. ► These compounds possess high thermal stability. ► SPF-MB and SPF-BB can be used as optical pH sensors of a wide pH range. ► SPF-BB is highly selective in r...

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Bibliographic Details
Published in:	Organic electronics Vol. 13; no. 9; pp. 1553 - 1564
Main Authors:	Xiao, Haibo, Yin, Hongyao, Wang, Lei, Ding, Lei, Guo, Songkui, Zhang, Xiaoying, Ma, Dongge
Format:	Journal Article
Language:	English
Published:	Amsterdam Elsevier B.V 01-09-2012 Elsevier
Subjects:	Ag(I) Applied sciences Electroluminescent property Electronics Exact sciences and technology Fluorescent sensor General equipment and techniques Instruments, apparatus, components and techniques common to several branches of physics and astronomy Optoelectronic devices pH sensor Physics Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing Spirobifluorene derivatives Synthesis Electroluminescent property Ag(I) Spirobifluorene derivatives Fluorescent sensor Synthesis pH sensor Water White light Brightness Fluorescence Molybdenum oxide Thermal stability Cyclic voltammetry Low voltage Light emission Tin addition Fluorene derivatives Optoelectronic properties Lithium fluoride Measurement sensor Thermal behavior Doped materials Optical sensor Indium oxide Thermal properties Optical measurement Biphenyl derivatives Yellow light Chromaticity Spectral sensitivity Blue light Redox potential Recognition
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Summary:	[Display omitted] ► Novel spirobifluorene derivatives were synthesized starting from the readily available reagent 4,4′-bisalkylated biphenyl. ► These compounds possess high thermal stability. ► SPF-MB and SPF-BB can be used as optical pH sensors of a wide pH range. ► SPF-BB is highly selective in recognizing Ag+. ► Organic light emitting diodes were fabricated by using these compounds as the emitting layer. Five novel spirobifluorene derivatives, SPF-DM, SPF-MB, SPF-BB, BSPF-NA1 and BSPF-NA2 were synthesized starting from the readily available reagent 4,4′-bisalkylated biphenyl. Their linear absorption, fluorescence and thermal properties were examined and their redox potential levels were estimated by cyclic voltammetry. These compounds possess high thermal stability. SPF-MB and SPF-BB possess excellent spectral sensitivities to pH changes and can be used as optical pH sensors of a wide pH range. The recognition behavior of SPF-BB toward various metal ions has been evaluated in a acetonitrile/water (15:1, v/v) solvent system. SPF-BB is highly selective in recognizing Ag+. The electroluminescent properties of SPF-DM, SPF-MB, BSPF-NA1 and BSPF-NA2 are demonstrated with a device configuration of ITO/MoO3 (6nm)/NPB (80nm)/EML (30nm)/TPBI (40nm)/LiF (1nm)/Al (100nm). The devices of BSPF-NA1 and BSPF-NA2 display a yellow emission in the EL spectra and their maximum brightness reached 380 and 311cdm−2, respectively. At low turn-on voltage (7.9V) a light blue emission was observed in the device of SPF-DM and its maximum brightness reached 391cdm−2. Notably, the device of SPF-MB has a white emission with CIE coordinates (0.293, 0.307).
ISSN:	1566-1199 1878-5530
DOI:	10.1016/j.orgel.2012.05.002