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Supramolecular Sensor for Astringent Procyanidin C1: Fluorescent Artificial Tongue for Wine Components
Author(s) -
Sasaki Yui,
Ito Satoshi,
Zhang Zhoujie,
Lyu Xiaojun,
Takizawa Shinya,
Kubota Riku,
Minami Tsuyoshi
Publication year - 2020
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202002262
Subject(s) - astringent , wine , chemistry , fluorescence , supramolecular chemistry , electronic tongue , moiety , pyridinium , taste , organic chemistry , biochemistry , food science , molecule , physics , quantum mechanics
An artificial tongue that detects astringent components for a comprehensive evaluation of taste has not been established to date. Herein, we first propose fluorescent polythiophene (PT) derivatives ( S1 – S3 ) modified with 3‐pyridinium boronic acid as supramolecular chemosensors for wine components including astringent procyanidin C1. After numerous attempts for the synthetic conditions, more than 95 mol % of the PT unit was modified with the pyridinium boronic acid moiety. To evaluate the PT derivatives as chemosensors of the artificial tongue, qualitative and quantitative analyses were performed with four types of wine components (i.e., sweet, sour, bitter, and astringent tastes) in combination with pattern recognition models. Notably, procyanidin C1 in the actual wine sample was successfully detected in a quantitative manner. In other words, we have established an authentic artificial tongue using PT based supramolecular chemosensors.