Publications by authors named "En-Qin Fu"
[Synthesis and spectral characterization of novel chiral macrocyclic dioxopolyamines].
Guang Pu Xue Yu Guang Pu Fen Xi
July 2007
Two novel chiral macrocyclic dioxopolyamines, which can be used as NMR chiral solvating agents (CSAs) for chiral carboxylic acids, were synthesized from L-proline through esterification, bridging and ring-closing reaction. With the aid of orthogonal experiments the optimum reaction conditions were determined: for (8S, 18S)-1, 4, 10, 13, 16-pentaaza-tricyclo [16.3.
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- The FT-Raman and UV-visible spectra of a specific tetraazadicyclo compound and its derivatives were analyzed, with calculated harmonic vibrational wavenumbers compared to experimental data.
- The study found that the derivatives exhibited different amide characteristics, with minimal impact from various substituents on the vibrational modes of the macrocyclic structure.
- The use of different functional models for electronic excitation calculations revealed that the BLYP functional provided the best fit for UV-vis absorption data, highlighting the significance of strong hydrogen bonding in the compounds analyzed.