Simple Vanilla Derivatives for Long-Lived Room-Temperature Polymer Phosphorescence As Invisible Security Inks

Overview

Journal Research (Wash D C)

Specialty Biology

Date 2021 Mar 8

PMID 33681812

Citations 3

Authors

Yongfeng Zhang

Zhonghao Wang

Yan Su

Yan Zheng

Wenji Tang

Chaolong Yang

Hailong Tang

Lunjun Qu

Youbing Li

Yanli Zhao

Affiliations

Soon will be listed here.

Abstract

Developing novel long-lived room-temperature polymer phosphorescence (RTPP) materials could significantly expand their application scope. Herein, a series of RTPP materials based on eight simple vanilla derivatives for security ink application are reported. Attributed to strong mutual hydrogen bonding with polyvinyl alcohol (PVA) matrix, vanilla-doped PVA films exhibit ultralong phosphorescence emission under ambient conditions observed by naked eyes, where methyl vanillate shows the longest emission time up to 7 s. Impressively, when vanilla-doped PVA materials are utilized as invisible security inks, and the inks not only present excellent luminescent emission stability under ambient conditions but also maintain perfect reversibility between room temperature and 65°C for multiple cycles. Owing to the unique RTPP performance, an advanced anticounterfeiting data encoding/reading strategy based on handwriting technology and complex pattern steganography is developed.

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