科研之友
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摘要
Two isostructural one-dimensional lanthanide coordination polymers, with the general formula {[Ln(aip)(H2O)(5)]center dot 0.5(bdc)center dot 3H(2)O}(n) [Ln = Eu (1), Tb (2); H(2)aip 5-aminoisophthalic acid, H(2)bdc = 1,4-benzenedicarboxylic acid], have been synthesized by a diffusion technique at room temperature. Their structures were identified by X-ray diffraction. Complex 2 exhibits green emission, corresponding to the D-5(4) -> F-7(J) (J = 6-3) transitions of the Tb3+ ion. Significantly, when 2 was immersed in different organic solvents, it had a unique response to methanol compared to other solvents. Furthermore, 2 displayed highly sensitive and selective luminescence quenching to methanol with the ignorable interference of other small-molecule organics. This makes it a potential luminescence sensor for actual application in recognizing methanol.
