Three viologen-derived Zn-organic materials: photochromism, photomodulated fluorescence, and inkless and erasable prints

Abstract

Three zinc–viologen materials exhibit reversible photochromism, photomodulated fluorescence and the capability as inkless and erasable print media.

Assembled synthesis of luminescent mono/double‐layered 2D and 3D Zn (II)‐based coordination polymers tuned by flexible bis (pyridyl)propane‐1,2‐diamines and diverse organic dicarboxylates

“…In view of the good photoluminescent properties of Zn (II)‐based CPs, herein, the luminescent properties of nine polymers, free L1 and L2 ligands, as well as four organic dicarboxylic acids were carried out in solid state at room temperature. As shown in Figure , the free L1, L2 ligands, m ‐H 2 BDC and p ‐H 2 BDC molecules exhibit emission maximum at 395, 380, 382 and 393 nm upon excitation at 335, 328, 340 and 346 nm, respectively.…”

“…These potential properties are beneficial to form novel CPs with various topologies. Meanwhile, the unique d 10 configuration of Zn (II) cation enables the Zn (II)‐based CPs to exhibit excellent properties, such as luminescence . In view of the coordination spheres of Zn (II) cation, how to modulate the topological structures and properties through ligand design is particularly important for constructing target CPs.…”

Ionothermal synthesis of a photochromic inorganic–organic complex for colorimetric and portable UV index indication and UVB detection

“…S8 †). [36][37][38][39][40] The diverse machinability indicated that NEU20 could be used as a portable UV detector and could be applied as an inkless and erasable printing medium.…”

Chromic Properties of Carboxyphenyl Viologen Induced by Complexation in Cucurbit[7]uril

“…Chromic materials, whose colors change in response to external stimuli such as light, electricity, heat, and chemical species, [1–10] are of great current interest due to their practical applications in various fields. Among various organic chromic materials, substituted 4,4’‐bipyridinium derivatives (viologens) are particularly attractive because of their excellent redox properties, their stabilities, and their highly adjustable geometric structures, which enable the synthesis of the viologen‐derived ligands and the preparation of viologen‐derived metal‐organic materials [11–21] . In the past decade, many viologen‐derived crystalline materials have been synthesized, and a considerable number of them demonstrate fascinating chromic properties [11–23] .…”