Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 22nd May 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.

Functionalized Periodic Mesoporous Organosilicas: From Metal Free Catalysis to Sensing


In this work a widely usable post-modification route for Periodic Mesoporous Organosilicas (PMOs) was developed. Using the developed method, two diverse ligands, picolinic acid (Pic) and 4,4',4'',4'''-porphyrin-5,10,15,20-tetrayltetrabenzoic acid (Porph), were successfully covalently coupled onto the PMO material and well characterized. Both obtained materials still show high BET surface areas (565 m2/g for Pic@PMO, 483 m2/g for Porph@PMO and 548 m2/g for the unmodified PMO) and pore size (5.1 nm). The materials were subsequently tested for their catalytic activity in the cycloaddition of epoxide and CO2, a frequently studied carbon capture and utilization reaction. Interestingly, both materials showed very good reactivity (with conversions up to 90%) as metal free heterogeneous catalysts and proved to be perfectly stable in recyclability and aging tests. Moreover, by (co-)grafting Eu3+ and Tb3+ ions onto Pic@PMO and Yb3+ ions onto Porph@PMO strong emission was observed in the visible and near-infrared (NIR) range, respectively. Eu,Tb@Pic@PMO showed potential for use as a temperature sensor in the physiological range (a maximum Sr value of 2.11 %K-1 was obtained at 273 K), while Yb@Porph@PMO could efficiently be excited within the human tissue penetrat-ing window showing characteristic Yb3+ luminescence (with decay times around 10 μs). These findings prove that simple modifications of this PMO can provide smart materials for very diverse applications.

Back to tab navigation

Supplementary files

Publication details

The article was received on 12 Mar 2019, accepted on 13 May 2019 and first published on 15 May 2019

Article type: Paper
DOI: 10.1039/C9TA02712B
J. Mater. Chem. A, 2019, Accepted Manuscript

  •   Request permissions

    Functionalized Periodic Mesoporous Organosilicas: From Metal Free Catalysis to Sensing

    L. Bourda, H. S. Jena, R. Van Deun, A. M. Kaczmarek and P. Van Der Voort, J. Mater. Chem. A, 2019, Accepted Manuscript , DOI: 10.1039/C9TA02712B

Search articles by author