＜正＞The design and synthesis of host molecules for neutral guests continues to be an area of great interest in ...
ZHOU, Bao-Han CHEN, Yun-Feng WU, An-Xin (Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, Department of Chemistry, Central China Normal University, Wuhan 430079)
The title compound 4-azido-2,2,6,6-tetramethylpiperidine-l-oxyl （C9H17N4O, Mr = 197.27） has been synthesized and its structure was determined by single-crystal X-ray diffraction. The crystal belongs to triclinic, space group P1^- with a = 5.8464（12）, b = 8.2476（17）, c = 11.954（2） A°, a = 101.973（4）, β = 97.186（3）, γ, = 100.232（3）°, V = 546.98（19） ,A°^3, Z = 2, Dc= 1.198 g/cm^3, μ（MoKa） = 0.082 mm^-1, F（000） = 214, R = 0.0495 and wR = 0.1355 for 1677 observed reflections with I 〉 2σ（I）. X-ray analysis reveals that the six-membered ring adopts a chair conformation and the bond length of N（1）-O（1） is 1.2838（19）A°.
The title compound 6H,7H,13H,14H-5a,6a,7a,12a,13a,14a-hxaazbenz[f]indeno[2,1,8- ija]naphth[2,3-f]azulene- 14b, 14c-dicarboxylic-5,8,12,15-tetrahydro-6,8,14-trioxo-diethyl ester （C27H26N6OT, Mr = 546.54） has been synthesized and its crystal structure was determined by single-crystal X-ray diffraction. The crystal belongs to monoclinic, space group P211c with a = 8.8129（6）, b = 17.9883（13）, c = 16.2623（11）A, β = 98.770（2）°, V = 2547.9（3）A3, Z = 4, De= 1.425 g/cm3, p（MoKa） = 0.105 mm-1, F（000） = 1144, the final R = 0.0672 and wR = 0.1162 for 2275 observed reflections with I 〉 2σ（I）. The crystal structural analysis shows that intermolecular C-H...O hydrogen bonds and π-π stacking interactions result in a three-dimensional framework. The binding study by fluorescence spectroscopy titration showed that he title compound can selectively recognize Fe3＋ with fluorescence quenching.
