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See the Supporting Information for details of the synthesis, structures, and characterization of compounds
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See the Supporting Information for details of the synthesis, structures, and characterization of compounds.
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43
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67650459229
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2, an intense split-type ICD was also observed at around 250 nm probably due to the absorption of the biphenol moieties. However, the addition of ethanol resulted in the disappearance of the ICD in the absorption region of the biphenol moieties as well as the π-conjugated chromophore region (see Figure S2 in the Supporting Information). These results indicate that a preferred-handed axially twisted conformation was also induced in the biphenol moieties upon the formation of a homo-double helix with an excess handedness.
-
2, an intense split-type ICD was also observed at around 250 nm probably due to the absorption of the biphenol moieties. However, the addition of ethanol resulted in the disappearance of the ICD in the absorption region of the biphenol moieties as well as the π-conjugated chromophore region (see Figure S2 in the Supporting Information). These results indicate that a preferred-handed axially twisted conformation was also induced in the biphenol moieties upon the formation of a homo-double helix with an excess handedness.
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44
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67650484384
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1H NMR spectra of (S)-I as a function of the temperature; that is, formation of a small aggregate for (S)-I rather than a specific duplex at high temperature, and this possibility could not be completely excluded, although the MS data support the duplex formation.
-
1H NMR spectra of (S)-I as a function of the temperature; that is, formation of a small aggregate for (S)-I rather than a specific duplex at high temperature, and this possibility could not be completely excluded, although the MS data support the duplex formation.
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45
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67650447099
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From the diffusion-ordered 1HNMR spectroscopy (DOSY) measurements for (S)-1 and 2 in CD2Cl 2 in the presence of the monomeric (S)-11 (see Scheme S1 in the Supporting Information) as the internal standard, the diffusion constants of (S)-1 and 2 were determined to be D≈4.0xl0-10m2s-1; these values were smaller than that of (S)-11 (D≈ 6.0x10-10m2S -1, see Figure S21 and S22 in the Supporting Information, These results indicate that (S)-1 and 2 form a similar aggregate, probably a dimer with an almost identical molecular weight in CH 2Cl2, although their absorption and NMR spectral patterns differ
-
2, although their absorption and NMR spectral patterns differ.
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46
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6 (see Figure S24 in the Supporting Information). 6799-6801
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6 (see Figure S24 in the Supporting Information). 6799-6801
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