Pyridine‐Based Rigidochromic Fluorescent Security Ink DOI Open Access

M. Zuo,

Cong Zeng, Jie Liu

et al.

Chinese Journal of Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: March 21, 2025

Comprehensive Summary Traditional fluorescent probes typically display blueshifted emission in rigidifying media; however, a newly developed class of rigidochromic fluorophores derived from phenanthridine demonstrates remarkable redshifted under similar conditions. Pyridine, with N‐heterostructure to those group, is considered promising candidate for achieving comparable rigidity‐induced redshift behavior. In this work, we synthesized eight organic featuring diverse functional units and substitutes by systematically combining pyridine carbazole, triazatruxene (TAT), tetraphenylethylene (TPE), respectively. These molecules exhibit significant redshifts (up 225 nm, record high value ever reported) or notable intensity changes as the rigidity polymer matrix increases, along unique acid responsiveness. The differences polar‐π interactions between polymers diversify behavior, advancing development secure printing intelligent optical materials. By embedding these into films helical phase structures, tunable chirality was achieved. Notably, leveraging acid‐responsive properties fluorophores, time‐dependent light‐controlled dynamic encryption system constructed, successfully enabling multi‐level information encryption. This research greatly expands scope their applications anti‐counterfeiting storage.

Language: Английский

Pyridine‐Based Rigidochromic Fluorescent Security Ink DOI Open Access

M. Zuo,

Cong Zeng, Jie Liu

et al.

Chinese Journal of Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: March 21, 2025

Comprehensive Summary Traditional fluorescent probes typically display blueshifted emission in rigidifying media; however, a newly developed class of rigidochromic fluorophores derived from phenanthridine demonstrates remarkable redshifted under similar conditions. Pyridine, with N‐heterostructure to those group, is considered promising candidate for achieving comparable rigidity‐induced redshift behavior. In this work, we synthesized eight organic featuring diverse functional units and substitutes by systematically combining pyridine carbazole, triazatruxene (TAT), tetraphenylethylene (TPE), respectively. These molecules exhibit significant redshifts (up 225 nm, record high value ever reported) or notable intensity changes as the rigidity polymer matrix increases, along unique acid responsiveness. The differences polar‐π interactions between polymers diversify behavior, advancing development secure printing intelligent optical materials. By embedding these into films helical phase structures, tunable chirality was achieved. Notably, leveraging acid‐responsive properties fluorophores, time‐dependent light‐controlled dynamic encryption system constructed, successfully enabling multi‐level information encryption. This research greatly expands scope their applications anti‐counterfeiting storage.

Language: Английский

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