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The H-acid dye intermediate was successfully attached to the SBA-15 mesoporous silica surface in a two-step modification process. Synthesized materials were characterized using several techniques including Fourier transform infrared spectroscopy, N2 adsorption−desorption measurements, small-angle X-ray scattering, transmission electron microscopy, and thermogravimetric analysis. The fluorescent sensing properties were examined in the final product toward several metal ions and showed high selectivity for Hg 2+ . Computational studies were performed in order to obtain a detailed electronic description of the quenching mechanism of H-acid fluorescence by Hg 2+ as well as studying the structure and bonding in the [H-acid]Hg 2+ complex.

Xenon is considered a great inhalation anesthetic gas. However, its worldwide usage is limited because of its shortage and the related high price. Advanced materials, such as metal−organic frameworks (MOFs), used to recover xenon from an exhaled anesthetic gas may open new opportunities and, consequently, result in reduced anesthetic costs. We used state-of-the-art atomistic simulations to investigate five analogues of well-known Cu-BTC (1,3,5-benzenetricarboxylic acid) MOF and unearthed their potential for being used not only in recovering xenon from exhaled anesthetic gas but also for designing new MOFs for this application. The performance of designed materials is demonstrated by simulating single-and multicomponent adsorption isotherms as well as separation factors such as selectivity, working capacity, and adsorbent performance indicator. In addition, boosting the applicability of selected MOFs through affordable lowering of operation temperature is predicted.

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