Synthesis, structures, and properties of a fluoranthene-based biphenol polymer as a fluorescent nano-thermometer

Yanzhen Guo, Xue Yu, Wenwei Xue, Shuaishuai Huang, Jing Dong, Liuhe Wei, Mark Maroncelli, Hongping Li

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

In this work, we explored a direct way of labeling poly(N-isopropylacrylamide) (PNIPAm) and developed a fluorescent thermometer with desired feature of aggregation-enhanced emission. A fluoranthene-based biphenol polymer, PNIPAm MAh-4 (PN4), consisting of N-isopropylacrylamide (NIPAm) and 4-(9-(2-(4-hydroxyphenyl)ethynyl)-7,10-diphenylfluoranthen-8-yl)-phenol (4) units as temperature-responsive and fluorescent signaling parts, respectively, was synthesized. The aqueous solution of PN4 exhibits weak fluorescence (FL) below 30. °C, whereas shows FL enhancement above 30. °C. The FL intensity increases with temperature monotonically until 50. °C, and the maximum FL intensity at 50. °C is about 7-fold higher than that at 15. °C. The FL enhancement is found to be associated with a heat-induced polymer chain conformation transition from hydrated coil to dehydrated globule. And the possible mechanisms for emission responses of PN4 against temperature, concentration and aggregation are suggested, respectively. The plausible mechanism of the sensitivity of the emission intensity to temperature or polymer state involves the deprotonation equilibrium and formation of the less fluorescent form of PN4. Meanwhile, the polymer possesses high reversibility of the FL response. Therefore the polymer PN4 is expected to have great potential as a fluorescent thermometer with high sensitivity and reversibility, and our work explores its utilities in molecular probes, biotechnology, multistimuli-responsive nanomaterials and smart polymer machines.

Original languageEnglish (US)
Pages (from-to)319-330
Number of pages12
JournalChemical Engineering Journal
Volume240
DOIs
StatePublished - Mar 15 2014

Fingerprint

fluoranthene
Thermometers
Polymers
fluorescence
polymer
Fluorescence
Agglomeration
temperature
Molecular Probes
Temperature
Deprotonation
biotechnology
Biotechnology
Phenol
Nanostructured materials
Labeling
Phenols
Conformations
phenol
aqueous solution

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

Cite this

Guo, Yanzhen ; Yu, Xue ; Xue, Wenwei ; Huang, Shuaishuai ; Dong, Jing ; Wei, Liuhe ; Maroncelli, Mark ; Li, Hongping. / Synthesis, structures, and properties of a fluoranthene-based biphenol polymer as a fluorescent nano-thermometer. In: Chemical Engineering Journal. 2014 ; Vol. 240. pp. 319-330.
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Synthesis, structures, and properties of a fluoranthene-based biphenol polymer as a fluorescent nano-thermometer. / Guo, Yanzhen; Yu, Xue; Xue, Wenwei; Huang, Shuaishuai; Dong, Jing; Wei, Liuhe; Maroncelli, Mark; Li, Hongping.

In: Chemical Engineering Journal, Vol. 240, 15.03.2014, p. 319-330.

Research output: Contribution to journalArticle

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T1 - Synthesis, structures, and properties of a fluoranthene-based biphenol polymer as a fluorescent nano-thermometer

AU - Guo, Yanzhen

AU - Yu, Xue

AU - Xue, Wenwei

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AU - Dong, Jing

AU - Wei, Liuhe

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AU - Li, Hongping

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