Photoluminescent coordination polymer bulk glasses and laser-induced crystallization.

Zeyu Fan,Setsuhisa Tanabe,Yong-Sheng Wei,Chinmoy Das,Aude Demessence,Ruilin Zheng,Satoshi Horike

doi:10.1039/d1sc06751f

Abstract

We synthesized luminescent coordination polymer glasses composed of d10 metal cyanides and triphenylphosphine through melt-quenching and mechanical milling protocols. Synchrotron X-ray total scattering measurements and solid-state NMR revealed their one-dimensional chain structures and high structural dynamics. Thermodynamic and photoluminescence properties were tunable by the combination of heterometallic ions (Ag+, Au+, and Cu+) in the structures. The glasses are moldable and thermally stable, and over centimeter-sized glass monoliths were fabricated by the hot-press technique. They showed high transparency over 80% from the visible to near-infrared region and strong green emission at room temperature. Furthermore, the glass-to-crystal transformation was demonstrated by laser irradiation through the photothermal effect of the glasses.

Highlights

Glassy coordination polymers (CPs) and metal-organic frameworks (MOFs) have been of interest as a new class of amorphous materials.[1,2,3,4] Their structure and properties are distinct from conventional glasses and are controlled by the combination of metal ions and bridging molecular ligands
The phase transition from MNMC-g to MNMC has been confirmed by Differential scanning calorimetry (DSC) and Powder X-ray diffraction (PXRD), which inspired us to demonstrate the glass-tocrystal transformation triggered by laser irradiation
We have explored three luminescent CP glasses MNMC-g composed of d10 metal cyanides and triphenylphosphine

Summary

Introduction

Glassy coordination polymers (CPs) and metal-organic frameworks (MOFs) have been of interest as a new class of amorphous materials.[1,2,3,4] Their structure and properties are distinct from conventional glasses and are controlled by the combination of metal ions and bridging molecular ligands. CuAu are similar to that of AgAu, indicating that they have the same 1D chain structures (Fig. S1A, S2A, S3A). The melt phases of CuAu and AgAu are colorless, and that of AgCu is yellow (Fig. S1B, S2B, S3B).

Results

Conclusion