Next Article in Journal
A Convenient, Rapid, Sensitive, and Reliable Spectrophotometric Assay for Adenylate Kinase Activity
Previous Article in Journal
Profiling Volatile Constituents of Homemade Preserved Foods Prepared in Early 1950s South Dakota (USA) Using Solid-Phase Microextraction (SPME) with Gas Chromatography–Mass Spectrometry (GC-MS) Determination
Previous Article in Special Issue
Mechanoresponsive Material of AIE-Active 1,4-Dihydropyrrolo[3,2-b]pyrrole Luminophores Bearing Tetraphenylethylene Group with Rewritable Data Storage
Article Menu
Issue 4 (February-2) cover image

Export Article

Open AccessArticle
Molecules 2019, 24(4), 662;

Triboluminescence of Centrosymmetric Lanthanide β-Diketonate Complexes with Aggregation-Induced Emission

Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hung Hom, Kowloon 999077, Hong Kong, China
Author to whom correspondence should be addressed.
Academic Editor: Gregor Drummen
Received: 11 January 2019 / Revised: 4 February 2019 / Accepted: 5 February 2019 / Published: 13 February 2019
(This article belongs to the Special Issue Lumino and Fluorophores—Illuminating Science and Technology)
Full-Text   |   PDF [2837 KB, uploaded 13 February 2019]   |  


Triboluminescence (TL) is a form of light emission induced upon mechanical forces on the material. However, our understanding of this phenomenon is still unclear and more examples are therefore needed in order to elucidate its mechanism. In this work, two types of TL complexes, [Eu(pp-dbm-Cl2)3phen] and [Eu(mm-dbm-Cl2)3phen], which also displays aggregation-induced emission (AIE) were synthesized and investigated for its photo-physical and crystal structural properties. These complexes were crystallized in a centro-symmetric space group P21/n, and remarkably, displayed TL upon grinding that may be due to the presence of extensive π···π, C-H···π and C-H···Cl-C interactions in the close molecular packing of its structure. This rare example deviates from the widely accepted mechanism of TL, hence widening the scope of our understanding in the area. View Full-Text
Keywords: triboluminescence; lanthanide; β-diketonate triboluminescence; lanthanide; β-diketonate

Graphical abstract

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Supplementary materials

  • Supplementary File 1:

    ZIP-Document (ZIP, 4142 KB)

  • Externally hosted supplementary file 1
    Link: http://N/A
    Description: SI and x ray crystal data

Share & Cite This Article

MDPI and ACS Style

Wong, H.-Y.; Chan, W.T.K.; Law, G.-L. Triboluminescence of Centrosymmetric Lanthanide β-Diketonate Complexes with Aggregation-Induced Emission. Molecules 2019, 24, 662.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Molecules EISSN 1420-3049 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top