Abstract
A multichannel device for information encryption that uses two fluorescent positional isomers of quinoxaline derivatives is reported. The asymmetry in their electron distribution results in distinguishable acid-/pH-responsive emissions that can be separately collected in different fluorescent channels. Thus, the reliability of the encryption can be improved by a minimal compositional difference and responsive mechanism on the molecular level. More information can be found in the Communication by N. Merbouh, F. F. Loeffler, et al. (DOI: 10.1002/chem.202103441).
Highlights
Fluorescence signals have been widely used in information encryption for a few decades, but still suffer from limited reliability
By using physically or chemically responsive fluorophores, the information presented by fluorescent signals can be readily decrypted and reencrypted, which reduces the accidental release of sensitive information.[3]
Merbouh Department of Chemistry, Simon Fraser University Burnaby, B.C. (Canada) E-mail: nmerbouh@sfu.ca stored in one single fluorescence channel, a repeated matter of trial and error will eventually lead to the key.[4]
Summary
Fluorescence signals have been widely used in information encryption for a few decades, but still suffer from limited reliability. The aggregation showed limited influence on the fluorescence properties for protonated fluorophores, where only a ~ 5 nm red-shift was observed in the excitation range. As displayed in the density functional theory (DFT) calculation results (Figure 2), the highest occupied molecular orbital (HOMO) located on the whole diphenylquinoxaline moiety in both Alk-DQ-1 and AlkDQ-2, showed a symmetric distribution, indicating a fully conjugated structure.
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