A simple AIE-active salicylideneaniline towards bimodal encryption-decryption with unique ESIPT-inhibited amorphous state

[Display omitted] •Bulky TPA is favorable for photochromism in the crystalline state.•Bulky TPA can help to form amorphous materials during fast precipitation procedure.•Excited-state intramolecular proton transfer is inhibited in the amorphous state for inactive photochromism.•Distinguished photoch...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2023-06, Vol.466, p.143353, Article 143353
Hauptverfasser: Cai, Xu-Min, Zhong, Weiren, Deng, Ziwei, Lin, Yuting, Tang, Zhenguo, Zhang, Xuedan, Zhang, Jianyu, Wang, Wenjin, Huang, Shenlin, Zhao, Zheng, Tang, Ben Zhong
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:[Display omitted] •Bulky TPA is favorable for photochromism in the crystalline state.•Bulky TPA can help to form amorphous materials during fast precipitation procedure.•Excited-state intramolecular proton transfer is inhibited in the amorphous state for inactive photochromism.•Distinguished photochromism is utilized for bimodal encryption-decryption. Multimodal encryption-decryption with photochromism has been proved to ensure information security with great feasibility and operability. However, most of the photochromic materials are applied in single-mode encryption-decryption and highly dependent on crystallization, requiring long manufacturing time and lacking of controllability. Hence, amorphous materials with simple preparation and bimodal encryption-decryption are of good alternates. Herein, we have succeeded in developing an aggregation-induced emission-active and photochromic ATPA-SAB with crystalline form via introduction of the propeller-like and bulky triphenylamine (TPA). Expectedly, the amorphous materials can be obtained by fast precipitation. Examining its amorphous structures, the intramolecular N‧‧‧H distances of around 4.000 Å is largely over the normal intramolecular hydrogen bond of circa 1.800 Å, impeding the intrinsic excited-state intramolecular proton transfer process (ESIPT) for the first time, hence prohibiting photochromism. This work not only provides a strategy to construct amorphous materials and inhibit ESIPT process with TPA, but also applies both crystalline and amorphous materials for bimodal encryption-decryption to upgrade information security.
ISSN:1385-8947
1873-3212
DOI:10.1016/j.cej.2023.143353