Modulated self-assembly of three flexible Cr(iii) PCPs for SO2 adsorption and detection†
Valeria B.
López-Cervantes, 
‡a
Dominic
Bara,
‡b
Ana
Yañez-Aulestia,
‡a
Yoarhy A.
Amador-Sánchez,
a
Diego
Solis-Ibarra,
*a
Ilich A.
Ibarra
*a
and
Ross S.
Forgan
*b
‡a
Dominic
Bara,
‡b
Ana
Yañez-Aulestia,
‡a
Yoarhy A.
Amador-Sánchez,
a
Diego
Solis-Ibarra,
*a
Ilich A.
Ibarra
*a
and
Ross S.
Forgan
*b
Abstract
Modulated self-assembly protocols are used to develop facile, HF-free syntheses of the archetypal flexible PCP, MIL-53(Cr), and novel isoreticular analogues MIL-53(Cr)-Br and MIL-53(Cr)-NO2. All three PCPs show good SO2 uptake (298 K, 1 bar) and high chemical stabilities against dry and wet SO2. Solid-state photoluminescence spectroscopy indicates all three PCPs exhibit turn-off sensing of SO2, in particular MIL-53(Cr)-Br, which shows a 2.7-fold decrease in emission on exposure to SO2 at room temperature, indicating potential sensing applications.
- This article is part of the themed collections: Celebrating our 2024 Prizewinners and 2023 Pioneering Investigators
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