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The synthesis of 1,6-disubstituted pyrene-based conjugated microporous polymers for reversible adsorbing and fluorescent sensing to iodine

Abstract

Here we present detailed evidence of highly efficient iodine capture and sensing in 1,6-disubstituted pyrene-based fluorescent conjugated microporous polymers, which were synthesized by a Sonogashira–Hagihara polycondensation reaction (TDP), trimerization reaction of bi-cycano compound (CPP) catalyzed using trifluoromethanesulfonic acid (PCPP), and Friedel-Crafts reaction catalyzed with CH3SO3H (TTPDP and TDTPAP), respectively. TDP, PCCP, TTPDP, and TDTPAP have specific surface areas of 261.9, 43.0, 187.5, and 695.2 m2 g-1, and display reversible guest uptake of 0.61, 3.07, 3.49, 4.19 g g-1 in iodine vapor. The four CMPs exhibit high sensitivity and selectivity to iodine via fluorescence quenching. Furthermore, PCPP exhibited extremely high detection sensitivity to I2 with Ksv of 1.40×105 L mol-1 and detection limit of 3.14×10-13 mol L-1. To the best of our knowledge, it displays the highest reported Ksv value and the lowest detection limit value to iodine to date.

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Supplementary files

Article information


Submitted
04 Nov 2019
Accepted
10 Jan 2020
First published
10 Jan 2020

New J. Chem., 2020, Accepted Manuscript
Article type
Paper

The synthesis of 1,6-disubstituted pyrene-based conjugated microporous polymers for reversible adsorbing and fluorescent sensing to iodine

T. Geng, C. Zhang, C. Hu, M. Liu, Y. Fei and H. Xia, New J. Chem., 2020, Accepted Manuscript , DOI: 10.1039/C9NJ05509F

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