Professor Hongbin Liang’s group: “Host differential sensitization toward color/lifetime-tuned lanthanide coordination polymers for optical multiplexing”
Source: School of Chemistry
Written by: School of Chemistry
Edited by: Tan Rongyu, Wang Dongmei
Optical multiplexing has attracted wide attention due to its potential applications in biological detection, information storage and security. The increasing demand for optical multiplexing applications also requires higher performance of materials, such as tunable emission color and lifetime, good physical and chemical stabilities, small particle sizes, high luminous efficiency and so on. Some reported luminescent materials, such as up-conversion nanoparticles and perovskite quantum dots, have shown good application prospects, but they still face such problems as low luminous efficiency and poor physical and chemical stability.
Lanthanide coordination polymers (LCPs) have become a new candidate for optical multiplexing applications due to their stable structure and antenna effect of ligands on lanthanide luminescence. Recently, based on the simple Y-BTC coordination polymers, Professor Hongbin Liang’s research group from School of Chemistry, Sun Yat-sen University, has proposed a “host differential sensitization” strategy, in which the large-scale color tunability from green to red and lifetime tunability of green emission in a range of 300-600 μs can be realized with different sensitization effects from ligand to different lanthanide ions (Tb
3+, Eu
3+, Sm
3+) and the energy transfer between lanthanide ions. Meanwhile, with the aids of inkjet printing, concepts of lifetime imaging and time-gated imaging technologies, the potential applications in information storage and security in spatial and temporal domain are also well demonstrated. This work puts forward a new choice of LCPs for optical multiplexing.
Figure 1. (a) Schematic illustration of the design strategy for color/lifetime-tuned LCPs. (b) Coordination environment of the lanthanide ions in Y-BTC host and the energy transfer between lanthanide ions and organic ligands. (c) Jablonski diagram with detailed energy levels and energy transfer processes in color/lifetime-tuned lanthanide-ions-activated Y-BTC.
This work has been accepted for publication in
Angewandte Chemie International Edition recently. Hongbin Liang (School of Chemistry, Sun Yat-sen University) is the corresponding author, PhD candidate Yiyi Ou and Dr. Weijie Zhou from School of Chemistry, Sun Yat-sen University are joint first authors. This work is financially supported by the National Natural Science Foundation of China (Grants 21671201, U1632101 and 61905289).
Link to the paper:
https://onlinelibrary.wiley.com/doi/10.1002/anie.202011559
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