Diarylethene-based conjugated polymer networks for ultrafast photochromic films
Diarylethene polymers are an emerging class of photochromic materials which offer new opportunities for the development of optical data recording and storage. This work reports two diarylethene-based conjugated polymer networks DPP-1 and DPP-2 constructed by Schiff-base polymerization of two-connect...
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Published in | New journal of chemistry Vol. 43; no. 39; pp. 15797 - 1583 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
CAMBRIDGE
Royal Soc Chemistry
2019
Royal Society of Chemistry |
Subjects | |
Online Access | Get full text |
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Summary: | Diarylethene polymers are an emerging class of photochromic materials which offer new opportunities for the development of optical data recording and storage. This work reports two diarylethene-based conjugated polymer networks
DPP-1
and
DPP-2
constructed by Schiff-base polymerization of two-connected photochromic unit 1,2-bis(5-formyl-2-methylthiophen-3-yl)perfluorocyclopentene (DEA-CHO) and tetrahedral four-connected unit tetra(
p
-aminophenyl)methane (TAPM) or plane three-connected unit 1,3,5-tris(4-aminophenyl)triazine (TAPT). The molecular structures of
DPP-1
and
DPP-2
were characterized by FT-IR and
13
C CP-MAS solid state NMR spectroscopy, and the morphology was investigated through scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The model compound was used to indicate the possibility of constructing
DPP-1
and
DPP-2
.
DPP-1
and
DPP-2
exhibited high chemical stability in the presence of strong acid (6 M HCl) and strong base (6 M NaOH) for 5 days.
DPP-1
and
DPP-2
showed ultrafast photochromic transformation between the open form (yellow) and closed form (green) with alternate irradiation of ultraviolet and visible light in 50 seconds, which were measured through UV-vis-NIR experiments. X-ray photoelectron spectroscopy (XPS) demonstrated that the electronic arrangement around the sulfur atoms changed during the process of the open form to the closed form. Moreover,
DPP-1
and
DPP-2
displayed excellent fatigue resistance that the absorbance only lost
ca.
5% after three cycles.
DPP-1
/PMMA and
DPP-2
/PMMA films fabricated by dispersing diarylethene-based conjugated polymer networks in the poly(methyl methacrylate) (PMMA) matrix also exhibited great photochromic reversibility and fatigue resistance, which provide potential applications towards the development of optical rewritable patterning and information storage devices.
Two new diarylethene-based conjugated polymers were synthesized, and their films exhibited ultrafast photochromism properties and excellent fatigue resistance. |
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Bibliography: | 1912118 1912117 For ESI and crystallographic data in CIF or other electronic format see DOI 10.1039/c9nj02596k Electronic supplementary information (ESI) available: Additional experimental figures, general characterization, and X-ray crystallographic data. CCDC and |
ISSN: | 1144-0546 1369-9261 |
DOI: | 10.1039/c9nj02596k |