Catching chloride: A tetrazole-based ligand without long alkyl chains is used to form a coordination polymer gel with CoBr2 (1). Gel 1 has a spherical structure with a 20–30 nm diameter. More interestingly, gel 1 selectively recognizes toxic gases, such as HCl, SOCl2, (COCl)2, and COCl2 that contain chloride atoms.
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Lee et al. (2011) studied this question.
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