Layered Zinc Phosphates with Photoluminescence and Photochromism: Chemistry in Deep Eutectic Solvents

Abstract

A metal‐activator‐free orange phosphor was synthesized from ZnO/H3PO3/diamine in choline chloride/oxalic acid deep eutectic solvent, which also acted as methylating agent and source of ethylene glycol (EG) by dissociation of choline ions. Interlayer incorporation of a dimethylated amine made the resulting layered zinc phosphate (“ZnPO”, see picture) photochromic, and their interaction with EG formed fluorophores with orange photoluminescence.

A Multifunctional MnII Phosphonate for Rapid Separation of Methyl Orange and Electron‐Transfer Photochromism

“…[17b,c] The fast photoresponse rate relates to the distance of the pathway for charge transfer.A se stablished in the aforementioned structure and XPS analyses, the pathway is from the phosphate group to imidazole;t he presence of the NÀH···O hydrogen bond facilitates electron transfer (Figure 1c). [29] The O···N distance is 2.847 , shorter than those previously reported (3.01-4.82 ) for light-activated donor (O)-acceptor (N) systems, [17] indicating af easible framework for electron transfer. [29] Furthermore,i ti sn oteworthy that the colored sample 1G provedtobestable in the dark for several months, with no obvious color bleaching.…”

“…[29] The O···N distance is 2.847 , shorter than those previously reported (3.01-4.82 ) for light-activated donor (O)-acceptor (N) systems, [17] indicating af easible framework for electron transfer. [29] Furthermore,i ti sn oteworthy that the colored sample 1G provedtobestable in the dark for several months, with no obvious color bleaching. This phenomenon indicates that an ultra-long-lived charge-separated state exists in the irradiated sample, which is vital for converting solare nergy into chemical energy.…”

Synthesis, Crystal Structure, Magnetic Property and Photo-Induced Coloration of a One-Dimensional Chain Complex

“…It is worth pointing out that the coordination arrangements make the distances between the oxygen atoms of the carboxyl groups and the N atom of the phen ligand as follows: 3.0261(37), 3.0615(39), 3.0428(37) and 4.1927(37) Å, respectively. According to the previous reports [13,21], the distance (smaller than 3.7 Å) satisfies the requirements for an inter-ligand charge transfer. The carboxylate group in complex 1 adopts µ 1 -η 1 -η 0 bridging modes to link two Co(II) ions …”

Nanoribbon‐Structured Organo Zinc Phosphite Polymorphs with White‐Light Photoluminescence

“…[8] Other examples are the polymorphs of interpenetration MOFs, in which open or catenated channels can lead to contrasting gas sorption properties. [9] However, compared with the more often encountered isomorphic phases (similar in structure but different in chemical composition), [10] true polymorphic phases are less explored and difficult to isolate, particularly those with open-framework structures. In this study, we show that the "mesitylene strategy" leads to purephase polymorph formation (Scheme 1).…”