Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 1, Pages 1237-1243Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b16050
Keywords
pyridazine; acid sensing; multicolor fluorescence; sensor; patterning
Funding
- National Natural Science Foundation of China [21522405, 51503142]
- National Key Research and Development Program of China [2017YFA0204503, 2017YFA0207800]
- Thousand Youth Talents Plan
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Smart luminescent materials that are responsive to external stimuli have received considerable attention. Here, we report a new D-A type 1,2-pyridiazine derivative (3,4,5,6tetrakis(4-methoxyphenyl)pyridazine (TPP)) exhibiting turn on fluorescence upon acid exposure both in solution and in the solid state. The protonation of the 1,2-pyridiazine ring caused a variation in the emission colors of the acidification species from blue (406 nm) to orange-red (630 nm) with a huge Ailem (224 nm). As a result, a synthetic rainbow of emission in solution could be achieved from one single molecule, and white photoluminescence was readily tuned by controlled protonation. A trifluoroacetic acid (TFA)-sensor film made from TPP was demonstrated as a TFA-sensitive surface with high sensitivity and reversibility. On the basis of these findings, we constructed a solid-state TPP film with a photoacid generator and demonstrated data encryption and decryption via a cascade protonation reaction that was well controlled by UV light.
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