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- W2003886186 abstract "Three-dimensionally organized amide groups have been demonstrated to show a high sensitivity toward anionic guests using poly(phenylacetylene)s with l-leucine and amide functionalities (poly-PA-Leu). The poly-PA-Leu was prepared from the N-(4-ethynylphenylcarbonyl)-l-leucine ethyl ester (PA-Leu) using Rh+(2,5-norbornadiene)[(η6-C6H5)B−(C6H5)3] (Rh(nbd)BPh4) as a catalyst. The biased helical conformation of poly-PA-Leu was demonstrated through Cotton effects in the circular dichroism (CD) spectra. The addition of ammonium salts including acetate, fluoride, benzoate, azide, and bromide (CH3COO−, F−, C6H5COO−, N3−, and Br−, respectively) into the poly-PA-Leu solution intensified the CD responses of the poly-PA-Leu, indicative of the polyacetylene helicity changes triggered by anion recognition of the amide groups. The efficient anion binding was observed for poly-PA-Leu with CH3COO−, whose apparent binding constant was estimated to be 1.1 × 103 (mol−1·L). On the other hand, the anions including perchlorate (ClO4−), nitrate (NO3−), chloride (Cl−), and iodide (I−) had essentially no effects on both the CD and UV profiles of poly-PA-Leu. The guest specificity observed in the CD spectra of poly-PA-Leu with counteranions clearly correlated with the guest-basicity." @default.
- W2003886186 created "2016-06-24" @default.
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- W2003886186 date "2009-02-12" @default.
- W2003886186 modified "2023-10-14" @default.
- W2003886186 title "Efficient Anion Recognition Property of Three Dimensionally Clustered Amide Groups Organized on a Poly(phenylacetylene) Backbone" @default.
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- W2003886186 doi "https://doi.org/10.1021/ma8025892" @default.
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