Si-assisted N, P Co-doped room temperature phosphorescent carbonized polymer Dots: Information Encryption, graphic Anti-counterfeiting and biological imaging

Yang Liu; Weihua Chen; Lehui Lu; Bai Yang

doi:10.1016/j.jcis.2021.11.120

Si-assisted N, P Co-doped room temperature phosphorescent carbonized polymer Dots: Information Encryption, graphic Anti-counterfeiting and biological imaging

J Colloid Interface Sci. 2022 Mar:609:279-288. doi: 10.1016/j.jcis.2021.11.120. Epub 2021 Dec 3.

Authors

Yang Liu¹, Weihua Chen², Lehui Lu², Bai Yang³

Affiliations

¹ State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, PR China.
² State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, University of Science and Technology of China, Changchun 130022, PR China.
³ State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, PR China. Electronic address: byangchem@jlu.edu.cn.

PMID: 34902671
DOI: 10.1016/j.jcis.2021.11.120

Abstract

Room temperature phosphorescence (RTP) materials have been widely noticed due to their superior optical properties in the past decade. Herein, we report the Si-assisted N, P co-doped RTP carbonized polymer dots (CPDs), prepared by one-step microwave assisted heating of 3-(2-Aminoethylamino)propyldimethoxymethylsilane and phosphoric acid aqueous solution. The obtained CPDs exhibit bright RTP with an absolute photoluminescence quantum yield 34.17%, absolute phosphorescence quantum yield 11.42% and long lifetime of 1.42 s, which lasts for about 16 s to the naked eyes. We apply the obtained CPDs into information encryption and Polyethyleneterephthalate (PET) film graphic anti-counterfeiting with facile way. Additionally, we make more efforts to realize aqueous RTP CPDs composite. The obtained aqueous CPDs composite exhibits bright aqueous RTP with absolute photoluminescence quantum yield (QY) of 12.61%, absolute phosphorescence quantum yield (QY) of 5.08% and RTP lifetime of 1.46 s, which lasts for about 10 s to the naked eyes. The RTP CPDs composite is nontoxic and biocompatible. These brilliant characteristics allow CPDs composite to be applicable in biological imaging. Thisstudy affords a new RTP material which can be easily prepared and used for information encryption, graphic anti-counterfeiting and biological imaging.

Keywords: Anti-counterfeiting; Biological imaging; Information encryption; P co-doped; Room temperature phosphorescence; Si-assisted N.

MeSH terms

Diagnostic Imaging
Polymers*
Quantum Dots*
Temperature

Substances

Polymers