Research ArticleMATERIALS SCIENCE

Large-scale preparation for efficient polymer-based room-temperature phosphorescence via click chemistry

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Science Advances  20 May 2020:
Vol. 6, no. 21, eaaz6107
DOI: 10.1126/sciadv.aaz6107
  • Fig. 1 Schematic representation for the polymer-based RTP.

    Facile and large-scale approach of RTP through B─O click reaction between phosphors with boronic acid and polymer with hydroxyl groups.

  • Fig. 2 Luminescent behaviors of TPEDB-PVA polymeric materials.

    (A) Fluorescent excitation (black), emission (blue), and RTP emission (green) spectra of TPEDB-PVA polymeric material. (B) Photographs of TPEDB-PVA polymeric material under 365-nm ultraviolet (UV) irradiation and at different time intervals after removal of UV irradiation. Photo credit: Rui Tian (first author), Beijing University of Chemical Technology. (C) RTP intensities of TPEDB-PVA polymeric materials with different contents of TPEDB.

  • Fig. 3 Luminescent performances of TPEDB-PVA polymeric materials with varied alcoholysis degree of PVA.

    (A) Fluorescent emission, (B) phosphorescent emission spectra, and (C) RTP lifetime of TPEDB-PVA polymeric materials (TPEDB of 0.08 mg) with alcoholysis degree of PVA ranged from 87%, 92%, to 98%, and the inset shows the radiative curve of TPEDB-PVA72 polymeric material (black) and the instrumental reference (blue).

  • Fig. 4 Structural studies for TPEDB-PVA polymeric materials.

    (A) XRD patterns and (B) FTIR spectra for TPEDB-PVA polymeric material (TPEDB of 0.08 mg) with alcoholysis degree of PVA ranging from 72%, 87%, 92%, to 98%. a.u., arbitrary units.

  • Fig. 5 DFT calculations of TPEDB-PVA polymeric materials.

    (A) Gibbs free energy change of the click reaction (TPEDB + PVA → TPEDB-PVA + H2O). (B) Molecular orbitals and energy levels of the ground state (S0), first singlet excited state (S1), and first triplet excited state (T1) for TPEDB molecule and PVA. (C) Definition of the dihedral angle (d) between the phenyl ring and C═C planes. (D) Distribution of dihedral angle d during AIMD for TPEDB-PVA (100, 67, and 50) and TPEDB with hydroxyl-free polymers (PDDA, PSS, and PVDF).

  • Fig. 6 Practicability of TPEDB-PVA RTP polymeric materials.

    (A) Solubility in water (the inset shows the photos captured under UV irradiation) [photo credit: Rui Tian (first author), Beijing University of Chemical Technology], (B) photostability under UV irradiation, (C) photographs of scalable preparation of TPEDB-PVA polymeric materials (radii of 0.5, 1.0, and 2.5 cm) [photo credit: Qi Xu (coauthor), Beijing University of Chemical Technology], (D) lifetime-dependent data encryption, and (E) digital coding written by TPEDB ink on PVA under and after UV irradiation.

Supplementary Materials

  • Supplementary Materials

    Large-scale preparation for efficient polymer-based room-temperature phosphorescence via click chemistry

    R. Tian, S.-M. Xu, Q. Xu, C. Lu

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