A bis(aza-18-crown-6)-containing 2,5-di(benzylidene)cyclopentanone and a bis(ammoniopropyl) derivative of 1,2-di(4-pyridyl)ethylene in MeCN were found to form a supramolecular charge-transfer complex, which can act as an "off-on" fluorescent sensor for the Ca and 1,12-dodecanediammonium ions. The molecular structure of this complex in solution was studied by density functional theory calculations.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10579611PMC
http://dx.doi.org/10.3389/fchem.2023.1263440DOI Listing

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