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Geometry optimizations and followed frequency calculations were performed for PbI (PbI+, PbI, and PbI−), PbI2 (PbI2+, PbI2, and PbI2−), PbI3 (PbI3+, PbI3, and PbI3−), PbI4 (PbI4, PbI4−, and PbI42−), PbI5 (PbI5, PbI5−, PbI52−, and PbI53−), and PbI6 (PbI6−, PbI62−, PbI63−, and PbI64−) at the CCSD(T) level with aug-cc-pVDZ pseudopotentials and valence basis sets. Both PbI6− and PbI64− are unstable while...
The triazine‐based bisbinaphthyl crown ethers oxacalix[2]arene[2]bisbinaphthes R-1, R-2, R-3 and S-1, S-2, S-3 were synthesized. The interactions of these compounds with various α‐aminocarboxylic acid anions were studied. The crown ethers were found to carry out highly enantioselective fluorescent recognition of α‐aminocarboxylic acid anions. It is observed that within a certain concentration range,...
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