Abstract
Covalent Organic Frameworks (COFs), an emerging class of crystalline porous materials, are a new type of support for grafting lanthanide ions (Ln3+), which can be employed as ratiometric luminescent thermometers. In this work we have shown that COFs co‐grafted with lanthanide ions (Eu3+, Tb3+) and Cu2+ (or potentially other d‐metals) can
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