Issue 46, 2021

Molecular engineering towards tunable morphology of metal–organic complex microcrystals for efficient and multicolor electrochemiluminescence

Abstract

Electrochemiluminescence (ECL) of crystalline materials has recently attracted increasing attention due to their unique characteristics and applications, such as crystallization-induced emission, active waveguiding, and biosensing. Tris(2,2′-bipyridine)ruthenium(II), [Ru(bpy)3]2+, a classical metal–organic complex for ECL studies, has been fully investigated in solution as well as its derivatives. However, the dependence of ECL properties on the molecular structure and crystal morphology of these complexes has not been illustrated, partially due to the difficulty in the controlled crystal growth. Here, we adopt a facile molecular engineering strategy to obtain microcrystals of [Ru(bpy)3]2+ derivatives with well-defined morphology (rods, wires, or polyhedrons) and varied phosphorescence emission colors (yellow, orange, and red) by simply changing the position and number of methyl substituents on the bipyridine ligands. The packing modes of molecules influenced by methyl groups play a vital role in crystal growth based on attachment energy analysis. The obtained microcrystals could act as ECL luminophores when modified on glassy carbon electrode surfaces. Those with one-dimensional (1D) morphology generally show superior ECL efficiency and stability to three-dimensional (3D) shaped microcrystals. ECL biosensors made of stable 1D microcrystals show reliable and sensitive responses to hydroxyproline, demonstrating their capacity in recyclable detections. This work demonstrates the great potential of molecular engineering in controlling the morphology, emission colors, and ECL properties of molecular crystals, paving the way for the development of high-performance ECL biosensing and optoelectronic devices.

Graphical abstract: Molecular engineering towards tunable morphology of metal–organic complex microcrystals for efficient and multicolor electrochemiluminescence

Supplementary files

Article information

Article type
Paper
Submitted
22 Ndz 2021
Accepted
26 Nhl 2021
First published
27 Nhl 2021

J. Mater. Chem. C, 2021,9, 16485-16494

Molecular engineering towards tunable morphology of metal–organic complex microcrystals for efficient and multicolor electrochemiluminescence

C. Ding, J. Shao, Z. Gong, Y. Zhong and J. Yao, J. Mater. Chem. C, 2021, 9, 16485 DOI: 10.1039/D1TC04542C

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements