A1 Journal article (refereed)
Selective encapsulation and enhancement of the emission properties of a luminescent Cu(I) complex in mesoporous silica (2018)

Donato, L., Atoini, Y., Prasetyanto, E. A., Chen, P., Rosticher, C., Bizzarri, C., Rissanen, K., & De Cola, L. (2018). Selective encapsulation and enhancement of the emission properties of a luminescent Cu(I) complex in mesoporous silica. Helvetica Chimica Acta, 101(2), e1700273. https://doi.org/10.1002/hlca.201700273

JYU authors or editors

Rissanen, Kari

Publication details

All authors or editors: Donato, Loïc; Atoini, Youssef; Prasetyanto, Eko Adi; Chen, Pengkun; Rosticher, Céline; Bizzarri, Claudia; Rissanen, Kari; De Cola, Luisa

Journal or series: Helvetica Chimica Acta

ISSN: 0018-019X

eISSN: 1522-2675

Publication year: 2018

Volume: 101

Issue number: 2

Pages range: e1700273

Publisher: Wiley-VCH

Publication country: Switzerland

Publication language: English

DOI: https://doi.org/10.1002/hlca.201700273

Publication open access: Not open

Publication channel open access:

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/57192

Abstract

We describe a synthetic approach to prepare new luminescent silica‐based materials through the encapsulation of a neutral copper(I) complex inside the pores of mesoporous silica nanoparticles (MSN). The copper(I) complex is present, in the solid state, as two polymorphs, blue and yellow emissive, and in solution it shows a pale yellow color that is also mirrored by an emission in the yellow‐orange region of the electromagnetic spectrum. The X‐ray structures of single crystals have been obtained for both polymorphs. The complex encapsulation in MSN is achieved by its entrapment inside micelles followed by condensation of the silica source. Interestingly, the entrapment leads to the isolation of only one species. Indeed, the compound inside the MSN exhibits remarkable photophysical properties, showing an intense blue emission in solution and in the solid state. Powder X‐ray diffraction of the hybrid materials proves that the complex entrapped in MSN is indeed the blue polymorph. The confinement provides not only a method to isolate only one form of the complex, but also a certain rigidity, more stability of the system by protection of the complex from undesirable oxidation, leading to a highly emissive material possessing a photoluminescence quantum yield of 65%.

Keywords: luminescence; nanoparticles; silicon

Free keywords: copper complex; silica; encapsulation; polymorph

Fields of science: