Inside Back Cover: New Transparent Rare‐Earth‐Based Hybrid Glasses: Synthesis, Luminescence, and X‐Ray Imaging Application

A desolvation method below 140 °C was reported for a rapid synthesis of RE(NO3)3(C5H2N4)2 hybrid glasses within an hour. The glasses containing the whole library of rare-earth ions exhibited a high transparency, which opened up a pathway to explore the elusive interactions between metals and organic linker, providing new insights for the design of rare-earth glasses (e70021).